Настройки

Укажите год
-

Небесная энциклопедия

Космические корабли и станции, автоматические КА и методы их проектирования, бортовые комплексы управления, системы и средства жизнеобеспечения, особенности технологии производства ракетно-космических систем

Подробнее
-

Мониторинг СМИ

Мониторинг СМИ и социальных сетей. Сканирование интернета, новостных сайтов, специализированных контентных площадок на базе мессенджеров. Гибкие настройки фильтров и первоначальных источников.

Подробнее

Форма поиска

Поддерживает ввод нескольких поисковых фраз (по одной на строку). При поиске обеспечивает поддержку морфологии русского и английского языка
Ведите корректный номера.
Ведите корректный номера.
Ведите корректный номера.
Ведите корректный номера.
Укажите год
Укажите год

Применить Всего найдено 1351. Отображено 100.
20-09-2012 дата публикации

Functionalizing implantable devices with a poly (diol citrate) polymer

Номер: US20120237443A1
Автор: Guillermo Ameer, Jian Yang
Принадлежит: Northwestern University

The present invention is directed to a novel poly (diol citrates)-based coating for implantable devices. More specifically, the specification describes methods and compositions for making and using implantable devices coated with citric acid copolymers or citric acid copolymers impregnated with therapeutic compositions and/or cells.

Подробнее
04-10-2012 дата публикации

Methods of generating a tendon tissue

Номер: US20120253463A1

Methods of generating and expanding proliferative, multipotent connective tissue progenitor cells from adult stem cells are provided. Also provided are methods of generating functional tendon grafts in vitro and bone, cartilage and connective tissues in vivo using the isolated cell preparation of connective tissue progenitor cells.

Подробнее
27-12-2012 дата публикации

Cell construct comprising polymer blocks having biocompatibility and cells

Номер: US20120329157A1
Автор: Kentaro Nakamura
Принадлежит: Fujifilm Corp

It is an object of the present invention to provide a cell three-dimensional construct that has a thickness sufficient for tissue regeneration and comprises cells uniformly distributed therein. The present invention provides a cell construct comprising polymer blocks having biocompatibility and cells, wherein the plural polymer blocks are arranged in spaces between the plural cells.

Подробнее
07-03-2013 дата публикации

Isolated populations of adult renal cells and methods of isolating and using same

Номер: US20130059325A1
Автор: Benjamin Dekel

A method of generating a nephrospheroid is disclosed. The method comprises culturing human adult kidney cells in a culture medium under non-adherent conditions. Uses thereof and other renal cell populations are also disclosed.

Подробнее
14-03-2013 дата публикации

Synthetic scaffolds and organ and tissue transplantation

Номер: US20130066438A1
Принадлежит: Individual

Articles, compositions, and methods for growing tissues and organs using bioreactors, including rotating bioreactors, are provided. Synthetic scaffolds for growing artificial tissue and organ transplants are also provided.

Подробнее
16-05-2013 дата публикации

Method for Preparing a Degradable Polymer Network

Номер: US20130123384A1
Принадлежит: Twente Universiteit

The present invention relates to methods for preparing a degradable polymer network. The methods for preparing a degradable polymer network comprise a) preparing a polymer composition comprising monomers of cyclic carbonates and/or cyclic esters and/or linear carbonates and/or linear esters and/or cyclic ethers and/or linear hydroxycarboxylic acids at a temperature between 20° C. and 200° C.; b) adding a cross-linking reagent comprising at least one double or triple C—C bond and/or a cross-linking radical initiator; c) processing the polymer composition (that contains the crosslinking reagentj into a desired shape; d) Crosslinking by irradiating the mixture. Further, the present invention relates to a degradable polymer network. Furthermore, the present invention relates to the use of the degradable polymer network.

Подробнее
25-07-2013 дата публикации

Automated cell culture system and process

Номер: US20130189723A1
Принадлежит: Global Cell Solutions Llc

The present invention relates generally to the field of cell culture, which is a laboratory process used primarily for the growth, propagation, and production of cells for analysis and the production and harvesting of cell products. The present invention comprises functionalized and/or engineered hydrogel microcarriers that exhibit any or all of the following properties: controllable buoyancy, ferro- or paramagnetism, molecular or fabricated reporting elements, and optical clarity. The microcarriers are used in a bioreactor that employs external forces to control said microcarrier kinetic energy and translational or positional orientation in order to facilitate cell growth and/or cellular analysis. The bioreactor can be part of an automated system that employs any or all of the following; a microcarrier manufacturing method, a monitoring method, a cell culture method, and an analytical method. Either a single bioreactor or a plurality of bioreactors are used in the automated system to enable cell culture and analysis with a minimum of human intervention.

Подробнее
29-08-2013 дата публикации

Three-dimensional fibrous scaffolds for cell culture

Номер: US20130224860A1
Принадлежит: UNIVERSITY OF SOUTH FLORIDA

Provided herein is a three-dimensional scaffold composition comprising randomly oriented fibers, wherein the fibers comprise a polyethylene glycol-polylactic acid block copolymer (PEG-PLA) and a poly(lactic-co-glycolic acid) (PLGA). Also provided are methods for using the three-dimensional scaffolds described herein.

Подробнее
20-02-2014 дата публикации

Pdgf induced cell homing

Номер: US20140050771A1
Автор: Jeremy J. Mao, Wenli Zhao
Принадлежит: Columbia University of New York

Provided is a method of causing a cell to migrate to a scaffold. Also provided is a method of treating a mammal that has a tissue defect. Further provided is a tissue scaffold comprising platelet-derived growth factor (PDGF). Additionally, a method of making a tissue scaffold capable of recruiting a cell is provided.

Подробнее
27-02-2014 дата публикации

Synthetic scaffolds and organ and tissue transplantation

Номер: US20140058508A1
Принадлежит: UCL BUSINESS LTD

Articles, compositions, and methods for growing tissues and organs using bioreactors, including rotating bioreactors, are provided. Synthetic scaffolds for growing artificial tissue and organ transplants are also provided.

Подробнее
08-01-2015 дата публикации

SYNTHETIC ATTACHMENT MEDIUM FOR CELL CULTURE

Номер: US20150010999A1
Принадлежит:

An aqueous cell culture medium composition includes an aqueous cell culture solution configured to support the culture of mammalian cells. The composition further includes a synthetic polymer conjugated to a polypeptide dissolved in the aqueous cell culture solution. The synthetic polymer conjugated to a polypeptide is configured to attach to the surface of a cell culture article under cell culture conditions. Incubation of the aqueous cell culture medium composition on a cell culture surface under cell culture conditions results is attachment to the surface of the synthetic polymer conjugated to the polypeptide. 1. An aqueous cell culture medium composition , comprising:an aqueous cell culture solution configured to support the culture of mammalian cells; and 'wherein the synthetic polymer conjugated to a polypeptide is configured to attach to the surface of a cell culture article under cell culture conditions, and', 'a synthetic polymer conjugated to a polypeptide dissolved in the aqueous cell culture solution;'}wherein incubation of the aqueous cell culture medium composition on a cell culture surface under cell culture conditions results in attachment to the surface of the synthetic polymer conjugated to the polypeptide.2. The composition of claim 1 , wherein the cell culture medium composition is a chemically defined composition.3. The composition of claim 1 , wherein the polymer has a linear backbone and is crosslink free claim 1 , wherein the synthetic polymer conjugated to the polypeptide is soluble in water at 20° C. or less claim 1 , andwherein the composition is substantially free of organic solvents.4. The composition of claim 1 , wherein the polymer is formed from at least one monomer comprising a conjugated polypeptide.5. The composition of claim 4 , wherein the at least one monomer comprising a conjugated polypeptide is methacrylic acid.6. The composition of claim 1 , wherein the polymer is formed from polymerization of (i) methacrylic acid conjugated ...

Подробнее
08-01-2015 дата публикации

TUBULAR TISSUE-ENGINEERED CONSTRUCTS

Номер: US20150012083A1
Принадлежит:

The present invention provides constructs including a tubular biodegradable polyglycolic acid scaffold, wherein the scaffold may be coated with extracellular matrix proteins and substantially acellular. The constructs can be utilized as an arteriovenous graft, a coronary graft, a peripheral artery bypass conduit, or a urinary conduit. The present invention also provides methods of producing such constructs. 1. A tubular construct comprising extracellular matrix proteins and polyglycolic acid having thickness greater than about 200 μm at the thinnest portion of the construct and having an internal diameter of ≧3 mm , wherein the construct is intimal hyperplasia and calcification resistant , wherein the polyglycolic acid comprises less than 33% of the cross-sectional area of said construct and wherein the construct is substantially acellular comprising less than 5% intact cells.2. The tubular construct of claim 1 , wherein the construct is substantially acellular comprising less than 1% intact cells.3. The tubular construct of claim 1 , wherein the construct is impermeable to fluid leakage up to at least 200 mm Hg.4. The tubular construct of claim 1 , wherein the construct is selected from the group consisting of an arteriovenous graft claim 1 , a coronary graft claim 1 , diseased peripheral artery bypass conduit claim 1 , fallopian tube replacement and a urinary conduit.5. The tubular construct of claim 1 , wherein the extracellular matrix proteins comprise hydroxyproline at >40 μg/mg dry weight.6. The tubular construct of claim 1 , wherein the construct comprises trace amounts of double stranded genomic DNA.7. The tubular construct of claim 1 , wherein the construct induces than 1% calcification within 6 months of implantation.8. The tubular construct of claim 1 , wherein the construct induces less than 1 mm of intimal hyperplasia thickening in native vasculature at anastomoses with the construct at 6 months of implantation.9. The tubular construct of claim 1 , ...

Подробнее
17-01-2019 дата публикации

Laminous Vascular Constructs Combining Cell Sheet Engineering And Electrospinning Technologies

Номер: US20190015558A1
Принадлежит:

Vascular scaffolds and methods of fabricating the same are disclosed for tissue engineering of vascular constructs. By combining electrospun matrices with cell sheet technologies, vascular constructs with more mature cell layers can be obtained for reconstruction of blood vessels, heart valves and the like. A engineered smooth muscle cell sheet, wrapped around an electrospun vascular scaffold, is able to provide a mature SMC layer that expresses strong cell-to-cell junction markers and contractile proteins. In addition, preconditioning of the cell sheet covered vascular scaffold maintained cell viability and infiltration into the scaffold. 125.-. (canceled)26. A method of producing a tissue engineered vascular construct comprising:forming a tubular biocompatible matrix;culturing a cell population comprising smooth muscle cells to form a cell sheet and applying the cell sheet to the outside of the matrix to form a vascular construct.27. The method of claim 26 , wherein at least two cell sheets are applied to the outside of the matrix to form the vascular construct.28. The method of claim 26 , further comprising seeding the inside of the matrix with a population of endothelial cells.29. The method of claim 26 , wherein the tubular matrix comprises at least one natural polymer.30. The method of claim 26 , wherein the tubular matrix comprises an electrospun matrix and the method further comprises forming a charged solution comprising at least one natural component claim 26 , or at least one synthetic polymer component claim 26 , or a combination thereof claim 26 , and streaming the electrically charged solution through an opening or orifice towards a rotating mandrel to deposit a tubular matrix of fibers on the mandrel.31. The method of claim 30 , wherein the natural component comprises collagen.32. The method of claim 30 , wherein the synthetic polymer component comprises poly(ε-caprolactone) (PCL).33. The method of wherein the fibers of at least an outer portion of ...

Подробнее
03-02-2022 дата публикации

DEVICES AND METHODS FOR SINGLE CELL ANALYSIS

Номер: US20220034867A1
Принадлежит:

The present disclosure provides systems, methods, and devices for the simultaneous determination of a single cell's response to a stimuli and characterization of its cell response. The present disclosure further provides methods for detection of disease state, clinical management of a subject suffering from a disease, drug screening, prediction of drug response, and stands to help direct drug and diagnostic development for the treatment of disease. 1. (canceled)2. A method of agent transfer comprising:providing a plurality of cells from a biological sample comprising a heterogenous population of cells from a patient positioned on a surface of a first solid substrate at a plurality of cell-philic sites;immobilizing a portion of the cells in a hydrogel concentration at their respective cell-philic sites thereby creating a plurality of three-dimensional cell microenvironments comprising the hydrogel composition and the cells, the hydrogel composition of each three-dimensional cell microenvironment being sized and positioned so as to extend upward with a dome shape from the surface of the solid substrate;dispending an agent onto an agent transfer device comprising a plurality of agent transfer array elements positioned on a surface of a second solid substrate; andcontacting the plurality of agent transfer array elements to the plurality of three-dimensional cell microenvironments, such that each agent transfer array element corresponds to a three-dimensional cell microenvironment, wherein the contacting allows the agent to be transferred to the plurality of three-dimensional cell microenvironments,3. The method of claim 2 , wherein the agent transfer device transfers at least 50% of the original concentration of the agent on the agent transfer device to the plurality of three-dimensional cell microenvironments.4. The method of claim 2 , wherein the plurality of cells comprise a clinical sample.5. The method of claim 2 , wherein the plurality of cells comprise a tumor ...

Подробнее
21-01-2016 дата публикации

SURFACE IMMOBILIZATION OF VARIOUS FUNCTIONAL BIOMOLECULES USING MUSSEL ADHESIVE PROTEIN

Номер: US20160017279A1
Принадлежит:

The present invention relates to technology of immobilizing or coating various functional bioactive substances on various surfaces without physical chemical treatment using mussel adhesive protein. More specifically, the present invention relates to a functional scaffold for tissue engineering comprising artificial extracellular matrix, manufactured by coating various functional bioactive substances on the surface of nanofiber and metal scaffold using mussel adhesive protein, and a method of manufacturing the same.

Подробнее
17-01-2019 дата публикации

SUPPORTED IN VITRO DEVELOPED TISSUE CULTURE AND CULTURING METHODS

Номер: US20190017016A1
Принадлежит:

An elongated or fiber-supported multicellular aggregation of multipotent cells, wherein multipotent cells are arranged in an oblong or longish arrangement with an aspect ratio of a prolate dimension to a perpendicular dimension of at least 2:1, or supported by a fibrous structure, and wherein the aggregate contains cells at different stages of differentiation, and the aggregate contains polar cells; methods of generating such aggregates; methods of developing the aggregates further into tissue organoids and kits for such methods. 115-. (canceled)16. A method of generating an elongated or fiber-supported multicellular aggregation of neural lineage with neuronal differentiated cells comprising the steps of:a) providing a plurality of pluripotent or non-human totipotent cells (i) that are located in an oblong or longish arrangement adhered to a support, said support has a length of 20 μm to 20 mm and a diameter of 1 μm to 60 μm, wherein said support is a biocompatible polymer that is not a biopolymer or wherein said support is a protein, or (ii) that are arranged on a fibrous structured support, and said support has a length of 20 μm to 20 mm and a diameter of 1 μm to 60 μm, wherein said fibrous structured support is a biocompatible polymer that is not a biopolymer or wherein said fibrous structured support is a protein; andb) letting said cells grow and differentiate in said arrangement, wherein said cells form intercellular bonds and adhere to each other;wherein said cells are stimulated to differentiate by a contacting the cells with a neuronal growth or differentiation factor.17. The method of claim 16 , wherein the arrangement has an aspect ratio of a prolate dimension to a perpendicular dimension of at least 2:1.18. The method of claim 16 , wherein said support is non-porous or has a porosity of less than 5% (v/v) of the supports volume.19. The method of claim 16 , wherein said support is a polymer microfilament and/or is biocompatible but not bioactive.20. The ...

Подробнее
21-01-2021 дата публикации

BIODEGRADABLE ELASTIC HYDROGELS FOR BIOPRINTING

Номер: US20210017319A1
Принадлежит:

Disclosed herein are hydrogel compositions comprising a triblock copolymer having a formula A-B-A, wherein A is a polycaprolactone (PCL) block or a polyvalerolactone (PVL) block and B is a polyethylene glycol (PEG) block. Also disclosed are methods of making a hydrogel comprising providing a photoinitiator and a triblock copolymer having a formula A-B-A, wherein the triblock copolymer comprises one or more ethylenically unsaturated moieties; and photocrosslinking the triblock copolymer, thereby forming a hydrogel. Also disclosed are methods of printing a three-dimensional (3D) article comprising extruding a printing composition from a deposition nozzle moving relative to a substrate, the printing composition comprising a photoinitiator and any herein disclosed triblock copolymer, wherein the triblock copolymer comprises one or more ethylenically unsaturated moieties; depositing one or more layers comprising the printing composition on the substrate; and photocrosslinking the triblock copolymer to form the printed 3D article. 1. A hydrogel composition comprising a triblock copolymer having a formula A-B-A , wherein A is a polycaprolactone (PCL) block or a polyvalerolactone (PVL) block and B is a polyethylene glycol (PEG) block.2. The hydrogel composition of claim 1 , wherein the PEG block B has a molecular weight ranging from 2 claim 1 ,000 Da to 100 claim 1 ,000 Da.3. The hydrogel composition of claim 1 , wherein A is a polycaprolactone (PCL) block.4. The hydrogel composition of claim 1 , wherein the block A has a molecular weight ranging from 200 Da to 10 claim 1 ,000 Da.5. The hydrogel composition of claim 4 , wherein the PEG block is a linear PEG polymer.6. The hydrogel composition of claim 1 , wherein the triblock copolymer comprises one or more acrylate claim 1 , methacrylate claim 1 , crotonate claim 1 , vinyl claim 1 , or norbornene moieties.7. The hydrogel composition of claim 1 , wherein the triblock copolymer is crosslinked by a free radical polymerization ...

Подробнее
21-01-2021 дата публикации

CELL EXPANSION SYSTEM

Номер: US20210017485A1
Автор: Lei Yuguo, Viljoen Hendrik
Принадлежит:

A cell expansion system for culturing and expanding cells in hydrogel tubes is disclosed herein. The cell expansion system allows for expanding cells that can significantly reduce the production time and cost, while increase the production capacity. 1. A cell expansion system for expanding cells , the system comprising:a cap comprising: an extruder comprising at least a first inlet and at least a second inlet, the first inlet operable for introducing a cell solution into the extruder, the second inlet operable for introducing a hydrogel-forming solution into the extruder; anda tubular housing in fluid connection with the extruder of the cap, wherein the tubular housing comprises a cell compatible buffer.2. The system of claim 1 , wherein the tubular housing further comprises a mesh.3. The system of claim 1 , wherein the cell solution comprises cells selected from the group consisting of mammalian embryonic stem cells claim 1 , mammalian induced pluripotent stem cells claim 1 , mammalian naive pluripotent stem cells claim 1 , cells differentiated from mammalian embryonic stem cells claim 1 , mammalian induced pluripotent stem cells and mammalian naive pluripotent stem cells claim 1 , mammalian cells reprogrammed from other cell types claim 1 , mammalian primary cells claim 1 , human umbilical vein endothelial cells claim 1 , cancer cells claim 1 , T cells claim 1 , mammalian tissue stem cells claim 1 , mammalian cell lines claim 1 , insert cells claim 1 , plant cells claim 1 , yeast and bacterial cells.4. The system of claim 1 , wherein the hydrogel-forming solution is an alginate solution comprising alginate polymer material selected from the group consisting of alginate acid polymers claim 1 , sodium alginate polymers claim 1 , modified alginate polymers claim 1 , and combinations thereof.5. The system of claim 4 , wherein the alginate solution comprises from about 0.01% (w/v) to about 20% (w/v) alginate.6. The system of claim 1 , wherein the hydrogel-forming ...

Подробнее
25-01-2018 дата публикации

Adipose tissue-derived stem cells for veterinary use

Номер: US20180021381A1
Принадлежит: CELL4VET CORP

The invention provides for compositions and methods for making and using adipose-derived stem cells for treating non-human mammals for various medical conditions.

Подробнее
22-01-2015 дата публикации

DEVICE-BASED METHODS FOR LOCALIZED DELIVERY OF CELL-FREE CARRIERS WITH STRESS-INDUCED CELLULAR FACTORS

Номер: US20150023911A1

The present invention relates to an in vitro or ex vivo method of preparing a cell-free composition, said method comprising or consisting of (a) subjecting cells to stress; and (b) collecting factors produced, preferably secreted by said cells when subjected to said stress, thereby obtaining said cell-free composition; wherein said cells are comprised in or form at least one first carrier and said collecting is effected by means of at least one second carrier which second carrier(s) is/are cell-free and concomitantly present with and spatially distinct from said first carrier; and said collecting is effected using a device comprising or consisting of (i) said first carrier(s) which first carrier(s) comprise(s) said cells or is/are suitable to hold said cells; (ii) said second carrier(s) which is cell-free; and (iii) means of subjecting said cells in said first carrier to stress; wherein first carrier(s) and second carrier(s) are positioned such that factors secreted by said cells when subjected to stress are collected in said second carrier(s), wherein means are positioned between said first and second carrier which prevent any cells and/or pathogens present in (any of) said first carrier(s) from entering into said second carrier(s). 1. An in vitro or ex vivo method of preparing a cell-free composition , said method comprising(a) subjecting cells to stress; and(b) collecting factors produced, thereby obtaining said cell-free composition;whereinsaid cells are comprised in or form at least one first carrier and said collecting is effected by means of at least one second carrier which at least one second carrier is cell-free and concomitantly present with and spatially distinct from said first carrier; and (i) said at least one first carrier which at least one first carrier comprises said cells or is suitable to hold said cells;', '(ii) said at least one second carrier which is cell-free; and', '(iii) at least one of said means of subjecting said cells in said first ...

Подробнее
10-02-2022 дата публикации

CELL CULTURE SUBSTRATE MADE OF NONWOVEN FABRIC MANUFACTURED USING ELECTROSPINNING AND METHOD OF MANUFACTURING THE SAME

Номер: US20220041970A1
Принадлежит: ORTHOREBIRTH CO. LTD.

A cell culture substrate used for growing mesenchymal stem cells (MSC) while maintaining the differentiation potency of the mesenchymal stem cells includes a nonwoven fabric made of resin fibers spun using an electrospinning method. The nonwoven fabric includes a plurality of resin fibers having outer diameters of 10-50 μm. The plurality of resin fibers are intertangled in random directions. A mesh structure is formed by the intertangled plurality of resin fibers adhering and joining together at locations where the resin fibers contact one another. The mesh structure forms mesh openings that have a substantially elliptical shape with a diameter of 100-200 μm and that are surrounded by curved fibers. Innumerable air bubble pores having diameters of 0.1-3 μm are formed over the entire surface of the fibers making up the nonwoven fabric. 1. A cell culture substrate made of a nonwoven fabric produced by using an electrospinning method ,the nonwoven fabric comprises a plurality of resin fibers having an outer diameter of 10 to 50 μm, wherein the plurality of resin fibers entangle each other in random directions,the plurality of resin fibers adhere and connect with each other at a plurality of locations to constitute a network structure, the network structure comprises substantially oval-shaped mesh holes having a diameter of 100-200 μm surrounded by curved resin fibers,the resin fibers constituting the nonwoven fabric do not contain an inorganic filler, and the resin fibers have numerous bubble pores with a diameter of 0.1 to 3 μm formed over an entire surface of the resin fibers.2. The cell culture substrate of claim 1 , wherein a thickness of the nonwoven fabric is 0.1 mm to 0.4 mm.3. The cell culture substrate according to claim 1 , wherein the resin fiber comprises a PLGA resin having a molecular weight of 0.2 million to 0.4 million.4. The cell culture substrate according to claim 1 , wherein the resin fibers constituting the nonwoven fabric do not contain an ...

Подробнее
24-01-2019 дата публикации

Phage-Based Matrix for Inducing Stem Cell Differentiation and Method for Preparing the Same

Номер: US20190024042A1
Автор: Yoo So Young
Принадлежит:

The present disclosure relates to a phage-based matrix for inducing stem cell differentiation and a method for preparing the same. More specifically, the present disclosure relates to a composition for inducing differentiation of stem cells, which includes a phage-based matrix in which a gradient of stiffness is controlled by crosslinking a recombinant phage with a polymer, and a method for preparing a phage-based matrix for stem cell differentiation. According to the present invention, the method of the present disclosure provides a physical and mechanical niche environment created by the formation of a nanofibrous structure of the phage whose stiffness is controlled, thereby promoting the differentiation of stem cells into target cells. Therefore, it can be applied to a tissue matrix platform as a variety of conventional tissue engineering materials. 1. A composition for inducing differentiation of stem cell into osteocyte or endothelial cells (EC) , comprising a phage-based matrix in which a gradient of stiffness is controlled by crosslinking a recombinant phage with a polymer ,wherein the recombinant phage is a recombinant phage displaying a cell delivery peptide on major coat protein and displaying HPQ on minor coat protein.2. A method of preparing a phage-based matrix for inducing differentiation of stem cell into osteocyte or endothelial cells (EC) , comprising the steps of:(a) preparing a recombinant phase displaying a cell delivery peptide on major coat protein and displaying HPQ on minor coat protein;(b) crosslinking the recombinant phage of the step (a) and the polymer to generate a phage-based matrix that gradient of stiffness is controlled; and(c) culturing stem cells in the phage-based matrix of the step (b) to induce differentiation into osteocyte or endothelial cells (EC).3. The method according to claim 2 , wherein the cell delivery peptide of the step (a) is selected from the group consisting of: RGD (Arg-Gly-Asp) claim 2 , RGDS (Arg-Gly-Asp-Ser) ...

Подробнее
28-01-2021 дата публикации

PACKED-BED BIOREACTOR SYSTEMS AND METHODS OF USING THE SAME

Номер: US20210024868A1
Принадлежит:

A packed-bed bioreactor system for culturing cells is provided, the system including a cell culture vessel having at least one interior reservoir, an inlet fluidly connected to the reservoir, and an outlet fluidly connected to the reservoir; and a cell culture matrix disposed in the reservoir. The cell culture matrix includes a structurally defined multi-layered substrate for adhering cells thereto, and each layer of the multi-layered substrate has a physical structure and a porosity that are substantially regular and uniform. 1. A packed-bed bioreactor system for culturing cells , the system comprising:a cell culture vessel comprising at least one interior reservoir, an inlet fluidly connected to the reservoir, and an outlet fluidly connected to the reservoir; anda cell culture matrix disposed in the reservoir, the cell culture matrix comprising a structurally defined multi-layered substrate configured for adhering cells thereto,wherein each layer of the multi-layered substrate comprises a physical structure and a porosity that are substantially regular and uniform.2. The packed-bed bioreactor system of claim 1 , wherein the cell culture matrix comprises a substantially uniform porosity.3. The packed-bed bioreactor system of claim 2 , wherein the cell culture matrix is configured for uniform fluid flow therethrough.4. The packed-bed bioreactor system of claim 1 , wherein the reservoir is defined by a length and a width claim 1 , the length extending from a first end of the reservoir adjacent to the inlet to a second end of the reservoir adjacent to the outlet claim 1 , the substrate layers each having a width extending substantially across a width of the reservoir.5. The packed-bed bioreactor system of claim 1 , wherein the structurally defined multi-layered substrate comprises a plurality of substrate disks stacked in the reservoir.6. The packed-bed bioreactor system of claim 5 , wherein the stack of the plurality of substrate disks is configured to exhibit ...

Подробнее
29-01-2015 дата публикации

Instruments and methods for the implantation of cell-seeded substrates

Номер: US20150032207A1
Принадлежит: Individual

Disclosed herein are instruments and methods for delivery of substrates, including cell-seeded substrates, to target tissues requiring treatment for various diseases that induce cell death, damage or loss of function. The substrates are configured to provide cells, including stem cells, with a structural support that allows interconnection with and transmission of biological signals between the cells and the target tissue.

Подробнее
31-01-2019 дата публикации

MICROSCAFFOLD

Номер: US20190032007A1
Принадлежит:

The invention provides a microscaffold comprising a porous particle, which particle: (a) comprises a three dimensional network of fibres, which fibres comprise a polymer, and (b) has a particle size of less than or equal to 2000 μm. Further provided is a composition, which composition comprises a microscaffold of the invention or a plurality of microscaffolds of the invention. The invention also provides a multi-well assay plate comprising: a plurality of sample wells, and a composition of the invention in at least one of the sample wells. The microscaffold, composition or multi-well plate may be used for regenerative medicine, tissue engineering, screening compounds for biological use or drug screening. The microscaffold may further comprise a magnetic material, and the invention additionally provides a method of manipulating one or more such microscaffolds. The method comprises exposing a composition that comprises one or more such microscaffolds to a magnetic field of a magnet, and thereby causing the one or more microscaffolds in the composition to be attracted to said magnet by magnetic attraction. 1. A microscaffold comprising a porous particle , which particle:(a) comprises a three dimensional network of fibres, which fibres comprise a polymer, and(b) has a particle size of less than or equal to 2000 μm.2. A microscaffold according to wherein the particle size is less than or equal to 500 μm.3. A microscaffold according to wherein the fibres are electrospun fibres.4. A microscaffold according to wherein the mean diameter of the fibres is from 500 nm to 10 μm claims 1 , preferably from 2 μm to 6 μm.5. A microscaffold according to wherein the relative standard deviation from said mean is less than or equal to 25%.6. A microscaffold according to wherein the particle has the shape of a cylinder or a polygonal prism.7. A microscaffold according to whereinthe height of the cylinder or polygonal prism is from 10 μm to 200 μm; andthe diameter of the cylinder or ...

Подробнее
05-02-2015 дата публикации

TISSUE SCAFFOLD

Номер: US20150037884A1
Принадлежит:

A tissue engineered construct made totally or in part from biocompatible materials and mammalian cells and/or cell products is provided. These constructs are useful in regenerating complex tissues such as bone, ligament and tendon, which may fabricated into medical devices suitable for use in the treatment of injuries and maladies such as rotator cuff injuries, periodontal disease and hernia. 1. A three-dimensional tissue comprising a biocompatible scaffold, a bioabsorbable material encasing or layered with the scaffold, and an extracellular matrix. This application is a continuation of U.S. application Ser. No. 11/890,989 filed Aug. 9, 2007, now U.S. Pat. No. 8,864,844, which is a continuation of International Application PCT/US05/16393 filed May 11, 2005, which claims priority to U.S. Provisional Patent Application No. 60/570,204 filed May 11, 2004, the entire disclosure of each of which is incorporated herein by this reference.A structure useful as an implantable device made totally or in part from biocompatible materials and mammalian cells and/or mammalian cell products is provided.Many complex tissues in the adult mammal fail to regenerate following injury or disease. For example, a critical sized defect in bone will fail to regenerate. Ligaments do not regenerate if destroyed by disease or injury such as the dental ligament in periodontal disease. Dermal ulcers in the elderly, diabetic, or individuals with venous stasis pathology can become chronic wounds that fail to heal. One approach to repair damage of this sort is referred to as Tissue Engineering wherein cells on matrices are used to affect tissue repair that would not occur without such an intervention. Tissue scaffolds are known in the art, see for example U.S. Pat. No. 6,451,060, 5,830,708, 6,284,284, 6,143,293, 6,306,169, 6,319,712, 6,228,117, and 5,916,585, and PCT and U.S. Patent Applications WO 99/03979, WO 01/03750, WO 01/85226, and US2003/0023316.U.S. Pat. No. 4,963,489 discloses a living ...

Подробнее
09-02-2017 дата публикации

CELL CULTURE DEVICE AND METHOD OF MANUFACTURING THE SAME

Номер: US20170037353A1
Принадлежит:

A cell culture device comprises a cell culture membrane and a substrate fixed to the cell culture membrane. The cell culture membrane is made from a thermosetting resin and has a plurality of pores that are open to at least one surface including a surface on a side that is in contact with the substrate. The substrate is made from a thermoplastic resin. In a contact region between the cell culture membrane and the substrate, part of the substrate is extended to form bulges in the pores of the cell culture membrane that are open in the contact region. This configuration suppresses reduction of the strength of the cell culture membrane and reduction of the flatness of the cell culture membrane (membrane accuracy) in the cell culture device in which the cell culture membrane and the substrate are fixed to each other. 1. A cell culture device comprising a cell culture membrane and a substrate fixed to the cell culture membrane , whereinthe cell culture membrane is made from a thermosetting resin and has a plurality of pores that are open to at least one surface including a surface on a side that is in contact with the substrate,the substrate is made from a thermoplastic resin, andin a contact region between the cell culture membrane and the substrate, part of the substrate is extended to form bulges in the pores of the cell culture membrane that are open in the contact region.2. The cell culture device according to claim 1 ,wherein the thermosetting resin from which the cell culture membrane is made is polyurethane.3. The cell culture device according to claim 1 ,wherein the thermoplastic resin from which the substrate is made is a resin selected from the group consisting of polyethylene, polypropylene, polystyrene, AS resin, ABS resin, polyvinyl chloride, acrylic resin, polyethylene terephthalate, polybutylene terephthalate polyvinyl alcohol, polyvinylidene fluoride, nylon 6, nylon 66, nylon 12, polyacetal, polycarbonate, polyether imide, polysulfone, ...

Подробнее
24-02-2022 дата публикации

HOST-GUEST INTERACTIONS FOR PA SUPERSTRUCTURE FORMATION

Номер: US20220056219A1
Принадлежит:

The disclosure relates to compositions and superstructures comprising peptide amphiphiles. In some aspects, the disclosure relates to compositions and superstructures comprising host and guest peptide amphiphiles, wherein the host and guest moieties of the peptide amphiphiles interact via non-covalent interactions to form a supramolecular assembly, such a superstructure. In some aspects, the superstructure further comprises a bioactive moiety. Suitable bioactive moieties may be selected to promote cell growth, migration, and/or differentiation. 1. A composition comprising:a. one or more host peptide amphiphiles comprising a hydrophobic segment, a structural peptide segment, a charged peptide segment, and a host moiety; andb. one or more guest peptide amphiphiles comprising a hydrophobic segment, a structural peptide segment, a charged peptide segment, and a guest moiety; andc. one or more diluent peptide amphiphiles, wherein each of the one or more diluent peptide amphiphiles comprises a hydrophobic segment, a structural peptide segment, and a charged peptide segment, and does not comprise a host moiety or a guest moiety,wherein the host moiety and the guest moiety interact non-covalently to form a host-guest complex within the composition.2. The composition of claim 1 , wherein the host moiety is β-cyclodextrin and the guest moiety is adamantane.3. The composition of claim 1 , wherein the hydrophobic segment comprises an 8-24 carbon alkyl chain (C) claim 1 , the structural peptide segment has propensity to form β-sheet-like structures with adjacent structural peptide segments claim 1 , and the charged peptide segment comprises an acidic claim 1 , basic claim 1 , or zwitterionic peptide segment.4. The composition of claim 1 , wherein the structural peptide segment comprises VA claim 1 , VA claim 1 , VA claim 1 , or VAand the charged peptide segment comprises E.5. The composition of claim 2 , wherein the β-cyclodextrin is conjugated to the charged peptide segment by ...

Подробнее
18-02-2021 дата публикации

INJECTABLE OFF-THE- SHELF CARTILAGE, TENDON, AND LIGAMENT REPAIR COMPOSITIONS AND METHODS OF USE

Номер: US20210047612A1
Принадлежит: EpiBone, Inc.

Compositions comprising a condensed mesenchymal cell body and a hydrogel are provided. The compositions may further include drugs or growth factors. The condensed mesenchymal cell body may include a connective tissue cell, or even a progenitor cell capable of producing connective tissue extracellular matrices such collagen and glycosaminoglycan. Also provided are methods of treating connective tissue defects, cartilage injury, and cartilage degradation. 1. A composition comprisinga) a condensed mesenchymal cell body (CMB); andb) a hydrogel.2. The composition of claim 1 , further comprisingc) one or more drugs or growth factors.3. The composition of claim 1 , further comprising a polymer microsphere claim 1 , wherein one or more of the drugs or the growth factors is encapsulated in the polymer microsphere.4. The composition of claim 3 , wherein the polymer microsphere comprises poly(lactic-co-glycolic acid) (PLGA) claim 3 , poly(lactic acid) (PLA) claim 3 , or a combination of PLGA and PLA.5. The composition of claim 1 , wherein the CMB comprises a cell selected from a connective tissue cell and a progenitor cell capable of forming a cartilage cell claim 1 , a tendon cell claim 1 , a ligament cell claim 1 , or a meniscal cell.6. The composition of claim 1 , wherein the CMB comprises a cell isolated from cartilage claim 1 , tendon claim 1 , ligament claim 1 , or meniscus.7. The composition of claim 6 , wherein the cell is a chondrocyte claim 6 , a tenocyte claim 6 , a tenoblast claim 6 , a fibrocyte or a fibroblast.8. The composition of claim 5 , wherein the CMB comprises a stem cell selected from a mesenchymal stem cell (MSC) claim 5 , an adipose-derived stem cell (ADSC) claim 5 , a bone-marrow derived stem cell (BMSC) claim 5 , an umbilical cord blood stem cell (UB-MSCs) claim 5 , a neural-crest stem cell claim 5 , an induced pluripotent stem cell claim 5 , an embryonic stem cell claim 5 , a primary chondrocyte claim 5 , and a neural-crest stem cell.9. The ...

Подробнее
16-02-2017 дата публикации

ACTIVE-ESTER-GROUP-CONTAINING COMPOSITION FOR PRODUCING FIBERS, AND CELL CULTURE SCAFFOLD MATERIAL USING FIBERS PRODUCED FROM ACTIVE-ESTER-GROUP-CONTAINING COMPOSITION

Номер: US20170044491A1
Принадлежит:

A composition for producing a fiber, containing (A) a polymer compound containing a unit structure represented by the formula (1) and a unit structure represented by the formula (2), (B) a crosslinking agent, (C) an acid compound, and (D) a solvent 3. The composition according to claim 1 , wherein the above-mentioned polymer compound has a weight average molecular weight of 1 claim 1 ,000-1 claim 1 ,000 claim 1 ,000.4. The composition according to claim 1 , wherein the above-mentioned solvent is a polar solvent.5. A production method of a fiber claim 1 , comprising a step of spinning the composition according to .6. The method according to claim 5 , wherein the above-mentioned spinning is electrospinning.7. The method according to claim 5 , comprising a step of heating a spun fiber at 70-300° C.8. The method according to claim 5 , further comprising a step for immobilizing a cell adhesion substance.9. A fiber produced by the method according to .10. A cell culture scaffold material comprising the fiber according to . The present invention relates to a composition for producing a fiber, which comprises a polymer compound having an active ester group and a hydroxy group in a side chain, a crosslinking agent, an acid compound, and a solvent, a fiber superior in organic solvent resistance, which is obtained by spinning (preferably, further heating) the composition, and a cell culture scaffold material using the fiber.In the bone marrow and basal lamina in the body, cells grow and proliferate in an extracellular matrix constituted of a fiber-like structure of a nano level such as collagen and the like. To provide cells necessary for cell medicine and regenerative medicine, a scaffold material for cell culture that enables efficient culture of cells ex vivo is desired. It is preferable that such cell culture scaffold material mimic as much as possible the in vivo environment surrounding the cell.It has conventionally been studied to process matrix constituent materials ...

Подробнее
25-02-2021 дата публикации

NANOPARTICULATE MINERALIZED COLLAGEN GLYCOSAMINOGLYCAN SCAFFOLD WITH AN ANTI-RESORPTION FACTOR

Номер: US20210052771A1

Compositions including a collagen glycosaminoglycan scaffold and osteoprotegerin are described. The compositions are useful in methods for promoting osteogenesis and attenuating bone resorption. 1. A composition comprising a collagen glycosaminoglycan scaffold and one or more of an osteoprotegerin (OPG) , an OPG fragment or an equivalent of each thereof.2. The composition of claim 1 , wherein the collagen glycosaminoglycan scaffold is a nanoparticulate mineralized collagen glycosaminoglycan (MC-GAG) scaffold.3. (canceled)4. The composition of claim 1 , wherein the OPG claim 1 , the OPG fragment or an equivalent of each thereof;is provided by a mesenchymal stem cell (MSC) or a cell differentiated from a MSC, that expresses the (OPG), the OPG fragment or the equivalent of each thereof; oris expressed at a level above endogenously expressed OPG; oris expressed at about 5 ng/mL to about 20 ng/mL; oris recombinant; or (i) a polynucleotide of SEQ ID NO: 1 or a polynucleotide that encodes SEQ ID NO: 2;', '(ii) a polynucleotide comprising a biological equivalent of SEQ ID NO: 1 or a polynucleotide that encodes SEQ ID NO: 2;', '(iii) a polynucleotide having at least 80% sequence identity to SEQ ID NO: 1 or a polynucleotide that encodes SEQ ID NO: 2; or', '(iv) a fragment of the polynucleotide of any one of (i)-(iii) that encodes functional OPG., 'is encoded by a nucleic acid, wherein the nucleic acid comprises58.-. (canceled)9. The composition of claim 4 , wherein the nucleic acid is operatively linked to one or more regulatory elements that provide for expression of the nucleic acid claim 4 , optionally wherein the nucleic acid and the one or more regulatory elements are comprised within a vector.10. The composition of claim 9 , wherein the vector is a eukaryotic vector or a prokaryotic vector.11. The composition of claim 10 , wherein the eukaryotic vector is selected from the group of: an adenoviral vector an alphaviral vector claim 10 , an adeno-associated viral vector ( ...

Подробнее
13-02-2020 дата публикации

CD34+,CD45- PLACENTAL STEM CELL-ENRICHED CELL POPULATIONS

Номер: US20200048603A1
Принадлежит: CELULARITY, INC.

Provided herein are methods and compositions for the production of hepatocytes from placenta stem cells. Further provided herein is the use of such hepatocytes in the treatment of, and intervention in, for example, trauma, inflammation, and degenerative disorders of the liver. Also provided herein are compositions and methods relating to combinations of nanofibrous scaffolds and adherent placental stem cells and methods of using the same in cartilage repair. Finally, provided herein are compositions and methods relating to nonadherent, CD34CD45stem cells from placenta. 1. A method of producing a hepatocyte , comprising contacting a CD10 , CD34 , CD105 and CD200 placental stem cell with sodium butyrate under conditions and for a time sufficient for said stem cell to exhibit a characteristic of a hepatocyte.2. The method of claim 1 , wherein said characteristic is production of asialogylcoprotein receptor claim 1 , alpha-1-antitrypsin claim 1 , albumin claim 1 , cytochrome P450 activity claim 1 , or the increased production of cytokeratin 18 relative to an undifferentiated placental stem cell.3. The method of claim 1 , wherein said culturing comprises encapsulating said stem sell in alginate-poly-L-lysine.4. A hepatocyte or hepatocytic cell produced by the method of .5. A method of treating a subject having a disease claim 4 , disorder or condition associated with liver inflammation claim 4 , comprising introducing the hepatocyte or hepatocytic cell of to said subject.6. The method of claim 5 , wherein said disease claim 5 , disorder or condition is cirrhosis or viral infection.7. A mouse comprising human placental stem cell-derived hepatocytes or hepatogenic cells claim 5 , wherein said mouse is produced by a method comprising the steps of:a. irradiating said mouse with gamma radiation sufficient to kill substantially all of the endogenous bone marrow cells;b. administering to said mouse sufficient bone marrow or bone marrow-derived cells from a NOD/SCID mouse to ...

Подробнее
22-02-2018 дата публикации

PROTEINASE-FREE COATINGS FOR COLONY PASSAGING

Номер: US20180051247A1
Принадлежит:

A cell culture article includes a substrate having a polymer coating that is conducive to colony passaging of cells cultured on the coating. Example polymer coatings are formed from polygalacturonic acid (PGA), alginate, or combinations thereof. Cells cultured on the polymer coating can be separated from the substrate as a colony or layer of cells by exposing the polymer coating to (i) a chelating agent, (ii) a proteinase-free enzyme, or (iii) a chelating agent and a proteinase-free enzyme. 1. A substrate for culturing cells , comprising:a polymer coating disposed on a surface of the substrate, wherein the polymer coating is cross-linked or grafted to the substrate and comprises at least one of PGA and alginate.2. The substrate according to claim 1 , wherein the polymer coating is cross-linked with calcium ions.3. The substrate according to claim 1 , wherein the polymer coating thickness ranges from 10 nm to 1000 microns.4. The substrate according to claim 1 , wherein the substrate is selected from the group consisting of microcarriers claim 1 , dishes claim 1 , bottles claim 1 , beakers and flasks.5. The substrate according to claim 1 , wherein the degree of cross-linking is uniform across the polymer coating thickness.6. The substrate according to claim 1 , wherein the degree of cross-linking decreases across the polymer coating thickness in the direction of the substrate.7. The substrate according to claim 1 , further comprising a cell adhesion layer on the polymer coating.8. The substrate according to claim 1 , further comprising a cell adhesion layer on the polymer coating selected from the group consisting of ECM proteins and synthetic molecules.9. A method for making an article for culturing cells claim 1 , comprising:forming a polymer coating on a substrate surface, wherein the polymer coating is cross-linked or grafted to the substrate and comprises at least one of PGA and alginate.10. The method according to claim 9 , wherein the degree of cross-linking is ...

Подробнее
10-03-2022 дата публикации

Fiber sheet, method for manufacturing fiber sheet, and cell culture chip

Номер: US20220073864A1

A fiber sheet of the present disclosure includes: a first fiber layer including a plurality of first fibers, the plurality of first fibers comprising a thermoplastic polymer and arranged side by side in a first direction; a second fiber layer including a plurality of second fibers, the plurality of second fibers comprising a thermoplastic polymer and arranged side by side in a second direction intersecting the first direction, and disposed to face the first fiber layer; and a nanofiber layer including nanofibers, the nanofibers comprising any one of a thermoplastic polymer, a thermosetting polymer, a biodegradable polymer, and a biological polymer, the nanofiber layer disposed to be in contact with the first fiber layer and the second fiber layer, in which the nanofiber layer is heat-welded to the first fiber layer and the second fiber layer.

Подробнее
10-03-2022 дата публикации

SYSTEMS AND METHODS FOR CULTURING CELLS IN SUSPENSION

Номер: US20220073868A1
Принадлежит:

A method of culturing adherent cells in suspension is provided that includes culturing adherent cells on a first substrate in a first suspension, harvesting the adherent cells from the first substrate, and transfecting the harvested adherent cells using electro-poration. The method also includes, after the step of transfecting, suspending the transfected adherent cells in a second suspension. A dissolution process for dissolving the second microcarrier particle to harvest the cells or cell products is also provided. This dissolution process includes adding a chelator, such as EDTA, to the second suspension for a predetermined time to separate the cells from the second microcarrier; and isolating the cells or cell products from a remainder of the second suspension after the predetermined time. The dissolution process is performed without enzymes such as pectinase or protease. 1. A method of culturing adherent cells in suspension , comprising:culturing adherent cells on a first substrate in a first suspension;harvesting adherent cells from the first substrate;transfecting the harvested adherent cells using electroporation;after the step of transfecting, suspending the transfected adherent cells in a second suspension.2. The method of claim 1 , wherein claim 1 , after electroporation claim 1 , the cells are recovered on a second substrate in suspension or in another suspension format.3. The method of claim 1 , the method further comprising harvesting the cells or products of the cells from the second suspension.4. The method of claim 1 , wherein the first substrate comprises a first microcarrier particle.5. The method of claim 1 , wherein the transfected adherent cells are suspended in the second suspension on a second substrate.6. The method of claim 5 , wherein the second substrate comprises a second microcarrier particle.7. The method of claim 6 , the method further comprising a dissolution process for dissolving the second microcarrier particle to harvest the cells ...

Подробнее
04-03-2021 дата публикации

TISSUE-ENGINEERED MEDICAL DEVICE

Номер: US20210060208A1
Принадлежит: UNIVERSITAT ZURICH

The present invention concerns a tissue-engineered medical device, as well as a method for the production said medical device, comprising the following steps: providing a polymer scaffold comprising a mesh comprising polyglycolic acid, and a coating comprising poly-4-hydroxybutyrate; application of a cell suspension containing preferably human cells to the polymer scaffold; placement of the seeded polymer scaffold in a bioreactor and mechanical stimulation by exposure to a pulsatile flux of incremental intensity, thereby forming an extracellular matrix; mounting of the graft on a conduit stabilizer and incubation in cell culture medium; decellularisation of the graft in a washing solution; nuclease treatment of the graft; and rinsing of graft. The invention further comprises and various steps of quality control of the tissue-engineered medical device. 1. A method for the production of a tissue-engineered medical device , comprising the following steps:A.) providing a polymer scaffold, said polymer scaffold comprising a substrate comprising polyglycolic acid, and a coating comprising poly-4-hydroxybutyrate;B.) application of a cell suspension containing isolated and expanded cells to the polymer scaffold, thereby producing a seeded polymer scaffold;C.) placement of the seeded polymer scaffold in a bioreactor and mechanical stimulation by exposure to a pulsatile flux of incremental intensity, thereby forming a tissue-engineered medical device comprising an extracellular matrix;D.) mounting of the tissue-engineered medical device on a conduit stabilizer and incubation under static conditions in a cell culture medium;E.) decellularisation of the tissue-engineered medical device in a washing solution comprising a detergent;F.) nuclease treatment of the tissue-engineered medical device;G.) rinsing of the tissue-engineered medical device.2. The method for the production of a tissue-engineered medical device according to claim 1 , characterized in that step A.) comprises ...

Подробнее
04-03-2021 дата публикации

PROTEINASE-FREE COATINGS FOR COLONY PASSAGING

Номер: US20210062142A1
Принадлежит:

A cell culture article includes a substrate having a polymer coating that is conducive to colony passaging of cells cultured on the coating. Example polymer coatings are formed from polygalacturonic acid (PGA), alginate, or combinations thereof. Cells cultured on the polymer coating can be separated from the substrate as a colony or layer of cells by exposing the polymer coating to (i) a chelating agent, (ii) a proteinase-free enzyme, or (iii) a chelating agent and a proteinase-free enzyme. 18-. (canceled)9. A method for making an article for culturing cells , comprising:forming a polymer coating on a substrate surface, wherein the polymer coating is cross-linked with calcium ions and comprises at least one of polygalacturonic acid (PGA) and alginate; andforming a cell adhesion layer on the polymer coating, the cell adhesion layer comprising at least one of extracellular matrix (ECM) proteins and synthetic molecules.10. The method according to claim 9 , wherein the degree of cross-linking is uniform across the polymer coating thickness.11. (canceled)12. The method according to claim 9 , comprising cross-linking the polymer coating after forming the polymer coating on the substrate.13. (canceled)14. The method according to claim 12 , wherein the degree of cross-linking decreases across the polymer coating thickness in the direction of the substrate.15. A method for culturing cells claim 12 , comprising:forming a polymer coating on a substrate surface, wherein the polymer comprises at least one of PGA and alginate;forming a cell adhesion layer on the polymer coating;culturing cells on the cell adhesion layer; andseparating the cells from the cell adhesion layer as a colony or layer of cells by exposing the polymer coating to (i) a chelating agent, (ii) a proteinase-free enzyme, or (iii) a chelating agent and a proteinase-free enzyme.16. The method according to claim 15 , wherein the chelating agent is EDTA.17. The method according to claim 15 , wherein the proteinase- ...

Подробнее
05-03-2015 дата публикации

Methods For Culturing Undifferentiated Cells Using Sustained Release Compositions

Номер: US20150064784A1
Принадлежит:

Methods for culturing undifferentiated mammalian cells, such as stem and progenitor cells, are provided. The methods involve incubating the cell in the presence of a sustained release composition containing at least one growth factor, wherein the sustained release composition continuously releases the growth factor(s), and wherein the presence of the sustained level of growth factor maintains the cell in an undifferentiated state. 1. A method for culturing a mammalian stem or progenitor cell , wherein the method comprises incubating the stem or progenitor cell in the presence of a sustained release composition containing at least one growth factor , wherein the sustained release composition releases the growth factor , and wherein the presence of the growth factor maintains the cell in an undifferentiated state.2. The method of claim 1 , wherein the sustained release of the growth factor maintains the concentration of the growth factor in the cell culture in a stable concentration range of 80%-100% of the starting concentration of growth factor.3. The method of claim 1 , wherein the sustained release of the growth factor maintains the concentration of the growth factor in the cell culture in a stable concentration range of 80%-95% of the starting concentration of growth factor.4. The method of claim 1 , wherein the sustained release of the growth factor maintains the concentration of the growth factor in the cell culture in a stable concentration range of 80%-90% of the starting concentration of growth factor.5. The method of claim 1 , wherein the sustained release composition releases at least one growth factor over a period of at least about 1 day.6. The method of claim 1 , wherein the sustained release composition is a poly(DL-lactide-co-glycolide) (PLGA) microsphere.7. The method of claim 6 , wherein the concentration of the PLGA microsphere ranges from about 5 to about 300 ng/ml.8. The method of claim 1 , wherein the sustained release composition further ...

Подробнее
18-03-2021 дата публикации

Medical and Dental Integrated Multiphasic Biomaterials for Single or Multi-Tissue Reconstruction/Regeneration

Номер: US20210077359A1
Принадлежит:

Disclosed herein are composite materials which may be used as biomedical materials or constructs. The disclosed biomedical materials or constructs may be multiphasic and typically provide a surface for cell growth. The disclosed biomedical materials and constructs typically comprise conjugable and/or adhesive chemical moieties, such as hydroxylated aromatic moieties, which facilitate integration of the components of the biomedical materials and constructs. Suitable hydroxylated aromatic moieties may include dihydroxybenzene (DHB) moieties, such as 1,2-DHB moeities, and derivatives thereof. 1. A biomedical material comprising a surface for cell growth and comprising hydroxylated aromatic moieties.2. The biomedical material of claim 1 , wherein the hydroxylated aromatic moieties are dihydroxybenzene (DHB) moieties.3. The biomedical material of claim 1 , wherein the hydroxylated aromatic moieties are 1 claim 1 ,2-DHB moeities.4. The biomedical material of claim 1 , wherein the biomedical material is an integrated heterophasic biomedical material comprising: (1) a supportive phase; and (2) a matrix phase; wherein the supportive phase and/or the matrix phase comprise DHB moieties.5. The biomedical material of claim 4 , wherein the supportive phase comprises and/or is prepared from 3D-printed materials claim 4 , titanium mesh materials claim 4 , bioceramic scaffold materials claim 4 , biocompatible glue materials claim 4 , polymeric film materials claim 4 , and/or electrospun mat materials.6. The biomedical material of claim 5 , wherein the supportive phase is claim 5 , capable of holding sutures and/or has bioadhesive properties whereby the supportive phase is capable of accommodating therapeutic or bioactive molecules.7. The biomedical material of claim 4 , wherein the matrix phase comprises and/or is prepared from freeze-dried collagen sponge material claim 4 , and/or decellularized tissue claim 4 , whereby the matrix phase may accommodate cells and/or other bioactive ...

Подробнее
24-03-2016 дата публикации

Microcarriers for stem cell culture and fabrication thereof

Номер: US20160083690A1

A method for manufacturing polycaprolactone microcarriers is disclosed together with uses of the microcarriers.

Подробнее
31-03-2022 дата публикации

Periosteal skeletal stem cells in bone repair

Номер: US20220096600A1
Автор: Dongsu Park, Laura ORTINAU
Принадлежит: Baylor College of Medicine

Embodiments of the disclosure encompass methods and compositions for bone repair and bone injury healing. In some embodiments, the bone repair and bone injury healing utilizes the enhancement of migration of certain types of bone cells upon stimulation by a particular cytokine. In specific embodiments, migration of periosteal skeletal stem cells upon delivery of CCL5 and/or TNFα is enhanced and fosters bone repair and healing.

Подробнее
12-03-2020 дата публикации

Polymeric Carriers and Methods

Номер: US20200080051A1
Принадлежит: Massachusetts Institute of Technology

Provided are methods of controlling disassociation of cells from a carrier, compositions, and methods of collecting cells. The methods of controlling disassociation of cells from a carrier may include contacting a polymeric carrier with one or more digesting agents to disassociate at least a portion of a plurality of cells from the polymeric carrier. The polymeric carrier may be crosslinked with a crosslinker including at least one of a redox sensitive moiety, a UV light sensitive moiety, a pH sensitive moiety, and a temperature sensitive moiety. 1. A method of controlling disassociation of cells from a carrier , the method comprising:providing a polymeric carrier and a plurality of cells adhered to the polymeric carrier; andcontacting the polymeric carrier with one or more digesting agents to disassociate at least a portion of the plurality of cells from the polymeric carrier;wherein the polymeric carrier is crosslinked with a crosslinker comprising at least one redox sensitive moiety.2. The method of claim 1 , wherein the at least one redox sensitive moiety comprises a disulfide bond.13. A method of controlling disassociation of cells from a carrier claim 1 , the method comprising:providing a polymeric carrier and a plurality of cells adhered to the polymeric carrier; andcontacting the polymeric carrier with one or more digesting agents to disassociate at least a portion of the plurality of cells from the polymeric carrier;wherein the polymeric carrier is crosslinked with a crosslinker comprising at least one of a UV light sensitive moiety, a pH sensitive moiety, and a temperature sensitive moiety.14. The method of claim 13 , wherein the crosslinker comprises the UV light sensitive moiety claim 13 , and the UV light sensitive moiety is a photoreversibly dimerizable moiety or a photocleavable moiety.19. The method of claim 14 , wherein the crosslinker comprises the photocleavable moiety claim 14 , and the photocleavable moiety comprises an o-nitrobezene based ...

Подробнее
25-03-2021 дата публикации

SYNTHETIC HYDROGELS FOR ORGANOGENESIS

Номер: US20210087534A1
Принадлежит:

Synthetic hydrogels for organogenesis support organogenesis from mammalian cells, including human cells. The synthetic hydrogels typically include a network of crosslinked branched biodegradable polymers. A portion of the branches of the branched biodegradable polymers are linked to binders which are generally synthetic peptides for cell and extracellular matrix attachment. The hydrogels may include an inhibitor of apoptosis. The synthetic hydrogels with the synthetic binders typically do not interfere with cellular, proteomic, genetic, and/or transcriptome analyses of organoids formed in the hydrogel. The synthetic hydrogels may be subject to on-demand dissolution to provide intact organoids substantially free of hydrogel polymers. Also provided are methods of making the synthetic hydrogels and methods of using the synthetic hydrogels for organogenesis. 1. A synthetic hydrogel cell culture matrix comprising:biodegradable polymers andbinders comprising one or more adhesion ligands and one or more peptide binders at a molar ratio between about 1.2:1 and 5:1, and, optionally,one or more inhibitors of apoptosis.2. The synthetic hydrogel of claim 1 , wherein the biodegradable polymers are branched biodegradable polymers.3. The synthetic hydrogel of claim 1 , wherein the biodegradable polymers comprise one or more polyalkylene glycols claim 1 , preferably polyethylene glycols.4. The synthetic hydrogel of claim 1 , wherein the biodegradable polymers have molecular weight between about 2 kDa and about 100 kDa.5. The synthetic hydrogel of claim 1 , wherein the biodegradable polymers are functionalized biodegradable polymers.6. The synthetic hydrogel of claim 1 , wherein the binders are synthetic peptides.7. The synthetic hydrogel of claim 1 , wherein the binders comprise one or more adhesion ligands and one or more peptide binders at a molar ratio between about 2:1 and about 5:1.8. The synthetic hydrogel of claim 1 , wherein the one or more adhesion ligands are cell-binding ...

Подробнее
29-03-2018 дата публикации

MICROFLUIDIC ASSISTED PERFUSION DEVICES

Номер: US20180085750A1
Принадлежит:

The disclosure provides for microfluidic devices comprising patterned hydrogels with embedded cells or microtissues. 1. A method for in vitro cell culture and screening comprising:(a) providing a cellular composition comprising cells in a polymerizable media; (i) an inlet channel;', '(ii) an outlet channel;', '(iii) an optically translucent or transparent cell culture chamber fluidly connected between the inlet and outlet, wherein the chamber comprises a biocompatible layer for cell binding and wherein the cell culture chamber comprises patterned hydrogels of natural polymers which comprise photoreactive side groups;, '(b) providing a microfluidic device, comprising(c) identifying cellular islands; and(d) polymerizing the islands with UV light.2. The method of claim 1 , wherein the cellular composition comprises stromal cells and/or parenchymal cells.3. (canceled)4. The method of claim 2 , wherein the stromal cells are fibroblasts.5. The method of claim 2 , wherein the parenchymal cells are cancer cells.6. The method of claim 1 , wherein the cellular composition comprises a polymerizable media of gelatin methacrylate with an ascorbic acid and a photoinitiator.7. The method of claim 1 , wherein the cell culture chamber comprises opposing surfaces coated with polyacrylamide and methacrylate.8. (canceled)9. The method of claim 1 , further comprising contacting the cellular islands with a test agent.1011-. (canceled)12. The method of claim 1 , wherein the cellular composition comprises natural polymers with photoreactive side groups.13. The method of claim 12 , wherein the natural polymers are selected from hyaluronic acid claim 12 , gelatin claim 12 , chitosan claim 12 , and cellulose.14. The method of claim 12 , wherein the photoreactive side groups are cinnamate groups claim 12 , acrylate-based groups claim 12 , or combination thereof.15. The method of claim 1 , wherein cellular islands comprise gelatin methacrylate.16. The method of claim 1 , wherein the polymerized ...

Подробнее
02-04-2015 дата публикации

BIODEGRADABLE POLYURETHANES AND USE THEREOF

Номер: US20150093821A1
Принадлежит:

A biodegradable and biocompatible polyurethane composition synthesized by reacting isocyanate groups of at least one multifunctional isocyanate compound with at least one bioactive agent having at least one reactive group —X which is a hydroxyl group (—OH) or an amine group (—NH). The polyurethane composition is biodegradable within a living organism to biocompatible degradation products including the bioactive agent. Preferably, the released bioactive agent affects at least one of biological activity or chemical activity in the host organism. A biodegradable polyurethane composition includes hard segments and soft segments. Each of the hard segments is preferably derived from a diurea diol or a diester diol and is preferably biodegradable into biomolecule degradation products or into biomolecule degradation products and a biocompatible diol. Another biodegradable polyurethane composition includes hard segments and soft segments. Each of the hard segments is derived from a diurethane diol and is biodegradable into biomolecule degradation products. 1. A biodegradable and biocompatible polyurethane composition synthesized by:{'sub': '2', 'reacting isocyanate groups of at least one multifunctional isocyanate compound with at least one bioactive agent having at least one reactive group —X which is a hydroxyl group (—OH) or an amine group (—NH), the polyurethane composition being biodegradable within a living organism to biocompatible degradation products including the bioactive agent, the released bioactive agent affecting at least one of biological activity or chemical activity in the host organism.'}2. The composition of wherein the multifunction isocyanate compound is formed via conversion of amine groups of a biocompatible compound having at least two amine groups to isocyanate groups.3. The composition of wherein the bioactive agent has at least two reactive groups —X and —Xwhich are independently the same or different a hydroxyl group (—OH) or an amine group (—NH ...

Подробнее
19-03-2020 дата публикации

METHODS AND COMPOSITIONS FOR MODULATION OF IMMUNE CELLS

Номер: US20200085971A1
Принадлежит:

The invention features a hydrogel complex that can bind to and modulate a desired immune cell, e.g., T cell, population. In certain embodiments, the complex can be dissolved, and thus dissociated from its targeted cell, representing a safe and efficient approach for processing immune cells, e.g., T cells for clinical use. The invention also provides methods and apparatus for synthesizing hydrogel complexes, as well as methods of using the complexes to generate expanded immune cell, e.g., T cell, populations as part of adoptive immune cell, e.g., T cell, therapy systems. 1. A particle comprising a complex comprising a hydrogel and a binding moiety , wherein:(a) the hydrogel comprises a polymer; and(b) the binding moiety is configured to bind a cell surface component of an immune cell.2. The particle of claim 1 , wherein the polymer comprises a natural polymer.3. The particle of claim 2 , wherein the natural polymer is selected from the group consisting of alginate claim 2 , agarose claim 2 , carrageenan claim 2 , chitosan claim 2 , dextran claim 2 , carboxymethylcellulose claim 2 , heparin claim 2 , hyaluronic acid claim 2 , polyamino acid claim 2 , collagen claim 2 , gelatin claim 2 , fibrin claim 2 , a fibrous protein-based biopolymer claim 2 , and any combination thereof.4. The particle of claim 1 , wherein the polymer comprises a synthetic polymer.5. The particle of claim 4 , wherein the synthetic polymer is selected from the group consisting of alginic acid-polyethylene glycol copolymer claim 4 , poly(ethylene glycol) claim 4 , poly(2-methyl-2-oxazoline) claim 4 , poly(ethylene oxide) claim 4 , poly(vinyl alcohol) claim 4 , and poly(acrylamide) claim 4 , poly(n-butyl acrylate) claim 4 , poly-(α-esters) claim 4 , poly(glycolic acid) claim 4 , poly(lactic-co-glycolic acid) claim 4 , poly(L-lactic acid) claim 4 , poly(N-isopropylacrylamide) claim 4 , butyryl-trihexyl-citrate claim 4 , di(2-ethylhexyl)phthalate claim 4 , di-iso-nonyl-1 claim 4 ,2- ...

Подробнее
19-03-2020 дата публикации

METHOD OF MANUFACTURING A CULTURE SUPPORT HAVING IMPROVED CELL ADHESIVENESS AND MOBILITY

Номер: US20200087618A1
Принадлежит:

Provided is a method of manufacturing a cell culture support having improved cell adhesion and mobility. The method includes: mixing a hydrophilic polymer, a hydrophobic polymer and a solvent to prepare an electro-spinning solution having a viscosity from 50 cps to 2000 cps; electro-spinning the electro-spinning solution to form polymer fibers having beads formed on each of the fibers; accumulating the polymer fibers to form a fibrous web having pores; and penetrating a culture solution into the pores of the fibrous web. The beads have a diameter larger than that of the polymer fibers. 1. A method of manufacturing a cell culture support having improved cell adhesion and mobility , the method comprising:mixing a hydrophilic polymer, a hydrophobic polymer and a solvent to prepare an electro-spinning solution having a viscosity from 50 cps to 2000 cps;electro-spinning the electro-spinning solution to form polymer fibers having beads formed in each of the polymer fibers;accumulating the polymer fibers to form a fibrous web having pores; andpenetrating a culture solution into the pores of the fibrous web.2. The method of claim 1 , wherein the polymer fibers have a diameter in a range from 100 nm to 10 μm.3. The method of claim 2 , wherein the beads have a diameter larger than that of the polymer fibers.4. The method of claim 1 , wherein the polymer fibers contain 60 wt % to 90 wt % of the hydrophilic polymer.5. The method of claim 1 , wherein the hydrophilic polymer is PVP (polyvinylpyrrolidone) or PAN (polyacrylonitrile).6. The method of claim 1 , wherein the hydrophobic polymer is one of PVdF (polyvinylidene fluoride) claim 1 , PU (polyurethane) claim 1 , and PES (polyethersulfone).7. The method of claim 1 , wherein the solvent is at least one selected from the group consisting of DMAc (N claim 1 ,N-dimethyl acetoamide) claim 1 , DMF (N claim 1 ,N-dimethylformamide) claim 1 , NMP (N-methyl-2-pyrrolidinone) claim 1 , DMSO (dimethyl sulfoxide) claim 1 , THF (tetra- ...

Подробнее
05-04-2018 дата публикации

HYDROGEL ENCAPSULATED CELLS AND ANTI-INFLAMMATORY DRUGS

Номер: US20180092850A1
Принадлежит:

A composition containing biocompatible hydrogel encapsulating mammalian cells and anti-inflammatory drugs is disclosed. The encapsulated cells have reduced fibrotic overgrowth after implantation in a subject. The compositions contain a biocompatible hydrogel having encapsulated therein mammalian cells and anti-inflammatory drugs or polymeric particles loaded with anti-inflammatory drugs. The anti-inflammatory drugs are released from the composition after transplantation in an amount effective to inhibit fibrosis of the composition for at least ten days. Methods for identifying and selecting suitable anti-inflammatory drug-loaded particles to prevent fibrosis of encapsulated cells are also described. Methods of treating a disease in a subject are also disclosed that involve administering a therapeutically effective amount of the disclosed encapsulated cells to the subject. 1. A composition comprisinga biocompatible hydrogel having encapsulated therein(a) one or more mammalian secretory, metabolic or structural cells; and(b) one or more anti-inflammatory drugs bound within or to the composition, encapsulated in or on polymeric particles dispersed on or within the biocompatible hydrogel, or a combination thereof;wherein the anti-inflammatory drug is released from the composition after implantation in a mammalian subject in an amount effective to prevent detectable fibrosis of the composition for at least 10 days, more preferably 14, 30, 60, or 90 days.2. The composition of claim 1 , comprising(a) a core comprising a biocompatible hydrogel,(b) an envelope comprising a biocompatible hydrogel, and(c) optionally a membrane separating the core and the envelope,wherein the one or more mammalian cells are encapsulated in the core,wherein the anti-inflammatory drugs or drug-loaded polymeric particles are encapsulated within the envelope, within the core, or within the envelope and the core.3. The composition of claim 2 , wherein the membrane comprises polycation crosslinked ...

Подробнее
12-05-2022 дата публикации

REINFORCED BIOCOMPATIBLE SCAFFOLD

Номер: US20220143271A1
Принадлежит: GLOBAL SURGICAL INNOVATIONS PTY LTD

A reinforced biocompatible scaffold facilitates integration of biological tissue. The reinforced scaffold comprises a porous biocompatible scaffold and an arrangement of at least one biocompatible filament embedded within and fixed to the biocompatible scaffold, and/or at least one biocompatible conduit embedded within and fixed to the biocompatible scaffold. 1. A reinforced biocompatible scaffold for facilitating integration of biological tissue within the scaffold , comprising:a porous biocompatible scaffold;an arrangement of at least one biocompatible filament embedded within and fixed to the biocompatible scaffold, and/orat least one biocompatible conduit embedded within and fixed to the biocompatible scaffold.2. The reinforced biocompatible scaffold of claim 1 , wherein least one biocompatible filament and/or conduit comprises polycaprolactone.3. The reinforced biocompatible scaffold of claim 1 , wherein the porous biocompatible scaffold has a hierarchical claim 1 , interconnected porous structure.4. The reinforced biocompatible scaffold of claim 1 , wherein the porous biocompatible scaffold has a porosity within the range of 30 to 95% of the volume of the scaffold.5. The reinforced biocompatible scaffold of claim 1 , wherein the porous biocompatible scaffold includes bioactive glass.6. The reinforced biocompatible scaffold of claim 1 , wherein the proportion of bioglass within the biocompatible scaffold is within the range of 0.1 wt % to 35 wt %.7. The reinforced biocompatible scaffold of claim 1 , wherein the diameter of the at least one biocompatible filament is in the range of 1 to 50 μm.8. The reinforced biocompatible scaffold of claim 1 , wherein the diameter of the at least one biocompatible filament is of nanometer scale.9. The reinforced biocompatible scaffold of claim 1 , wherein the diameter of the at least one biocompatible filament is greater than 50 μm.10. The reinforced biocompatible scaffold of claim 1 , wherein the at least one biocompatible ...

Подробнее
30-04-2015 дата публикации

SCAFFOLD

Номер: US20150118197A1
Принадлежит:

The invention provides a method for producing an electrospun scaffold, comprising electrospinning a polymer or co-polymer onto a template comprising a conductive collector having a three dimensional pattern thereon, wherein said electrospun polymer or co-polymer preferentially deposits onto said three dimensional pattern. 1. A method for producing an electrospun scaffold , comprising electrospinning a polymer or co-polymer onto a template comprising a conductive collector having a three dimensional pattern thereon , wherein said electrospun polymer or co-polymer preferentially deposits onto said three dimensional pattern.2. The method according to claim 1 , wherein said three dimensional pattern is non-conductive.3. The method according to or claim 1 , wherein said three dimensional pattern is dimensioned to provide an electrospun scaffold having at least one cavity therein capable of acting as a stem cell niche.4. The method according to any one of the preceding claims wherein said polymer or co-polymer is biodegradable.5. The method according to claim 4 , wherein said biodegradable polymer or copolymer is biocompatible.6. The method according to or claim 4 , wherein said biodegradable polymer is a collagen claim 4 , a poly alpha ester claim 4 , a polyorthoester or a polyanhydride or a copolymer thereof.7. The method according to claim 6 , wherein said biodegradable polymer or copolymer is cellulose ether claim 6 , cellulose claim 6 , cellulosic ester claim 6 , fluorinated polyethylene claim 6 , phenolic claim 6 , poly-4-methylpentene claim 6 , polyacrylonitrile claim 6 , polyamide claim 6 , polyamideimide claim 6 , polyacrylate claim 6 , polybenzoxazole claim 6 , polycarbonate claim 6 , polycyanoarylether claim 6 , polyester claim 6 , polyestercarbonate claim 6 , polyether claim 6 , polyetheretherketone claim 6 , polyetherimide claim 6 , polyetherketone claim 6 , polyethersulfone claim 6 , polyethylene claim 6 , polyfluoroolefin claim 6 , polyimide claim 6 , ...

Подробнее
27-04-2017 дата публикации

DERIVATION OF FIBROCHONDROCYTES FROM PROGENITOR CELLS

Номер: US20170112972A1

Provided herein are compositions and methods for forming fibrochondrocytes or fibrochondrocyte-like cells from progenitor cells, such as mesenchymal stem cells. One aspect provides a fibrochondrocyte culture medium including CTGF and TGFβ3, optionally encapsulated by microspheres having different release profiles. Another aspect provides a method for forming fibrochondrocytes or fibrochondrocyte-like cells from progenitor cells by culturing with CTGF and TGFβ3. 1. A culture medium for generating fibrochondrocyte or fibrochondrocyte-like cells comprising:CTGF encapsulated in a first microsphere; andTGFβ3 encapsulated in a second microsphere,wherein the first microsphere and the second microsphere have different release profiles.2. The culture medium of claim 1 , wherein the first microsphere is a 50:50 PLGA microsphere and the second microsphere is a 75:25 PLGA microsphere.3. The culture medium of claim 1 , wherein:(i) CTGF has a concentration of about 10 to about 1000 ng/mL; and TGFβ3 has a concentration of about 1 to about 1000 ng/mL; or(ii) CTGF has a concentration of about 100 ng/mL; and TGFβ3 has a concentration of about 10 ng/mL.4. The culture medium of claim 1 , further comprising a fibroblastic induction supplement or a chondrogenic induction supplement.5. A method of forming fibrochondrocytes or fibrochondrocyte-like cells comprising:{'claim-ref': {'@idref': 'CLM-00001', 'claim 1'}, '(i) contacting a progenitor cell and the culture medium of ; or contacting a progenitor cell with CTGF and TGFβ3 sequentially or concurrently; and'}(ii) culturing the progenitor cell so as to form a fibrochondrocyte or fibrochondrocyte-like cell.6. The method of claim 5 , wherein:(i) the first microsphere releases CTGF earlier or faster than the second microsphere releases TGFβ3;(ii) the first microsphere releases CTGF later or slower than the second microsphere releases TGFβ3;(iii) the first microsphere releases CTGF about the same time as the second microsphere releases TGFβ3 ...

Подробнее
09-04-2020 дата публикации

SYNTHETIC ATTACHMENT MEDIUM FOR CELL CULTURE

Номер: US20200109363A1
Принадлежит:

An aqueous cell culture medium composition includes an aqueous cell culture solution configured to support the culture of mammalian cells. The composition further includes a synthetic polymer conjugated to a polypeptide dissolved in the aqueous cell culture solution. The synthetic polymer conjugated to a polypeptide is configured to attach to the surface of a cell culture article under cell culture conditions. Incubation of the aqueous cell culture medium composition on a cell culture surface under cell culture conditions results is attachment to the surface of the synthetic polymer conjugated to the polypeptide. 135-. (canceled)37. The aqueous cell culture medium composition of claim 36 , wherein the cell culture medium composition is a chemically defined composition.38. The aqueous cell culture medium composition of wherein synthetic copolymer is introduced to cell culture medium in a dry state.39. The aqueous cell culture medium composition wherein the synthetic copolymer is added to cell culture media dissolved in water.40. The aqueous cell culture medium composition of claim 36 , wherein the molar ratio of the methacrylic acid conjugated to the polypeptide and the hydroxyethylmethacrylate is between 1 to 50 and 1 to 1.41. The aqueous cell culture medium composition of wherein the synthetic copolymer is formed from copolymerization of the hydroxyethylmethacrylate and MAA-PEO4-polypeptide claim 36 , wherein MAA is the methacrylic acid claim 36 , and PEO is polyethylene oxide.42. The aqueous cell culture medium composition of claim 36 , wherein the weight percentage of the polypeptide relative to the copolymer conjugated to the polypeptide is greater than 10%.43. The aqueous cell culture medium composition of claim 36 , wherein the polypeptide is a cell adhesive polypeptide.44. The aqueous cell culture medium composition of claim 36 , wherein the polypeptide comprises an RGD sequence.45. The aqueous cell culture medium composition of claim 36 , wherein the ...

Подробнее
09-04-2020 дата публикации

COMPOSITIONS AND METHODS FOR PROVIDING CELL REPLACEMENT THERAPY

Номер: US20200109370A1
Автор: Ferber Sarah
Принадлежит:

Disclosed is a three-dimensional (3D) cell cluster comprising transdifferentiated adult mammalian non-pancreatic beta cells having a mature pancreatic beta cell phenotype and function and a scaffold, wherein said transdifferentiated cells have an enhanced mature pancreatic beta cell phenotype compared to a 3D cell cluster without a scaffold and to similarly transdifferentiated cells cultured as a two-dimensional (2D) monolayer. 1. (canceled)2. (canceled)3. (canceled)4. (canceled)5. (canceled)6. (canceled)7. (canceled)8. (canceled)9. (canceled)10. (canceled)11. (canceled)12. (canceled)13. (cancelled)14. (canceled)15. (cancelled)16. (canceled)17. A method of generating a three-dimensional (3D) cell cluster comprising transdifferentiated mammalian non-pancreatic beta cells having a mature pancreatic beta cell phenotype and a scaffold; wherein at least a subset of said cells are attached to said scaffold , the method comprising:(a) providing a scaffold;(b) obtaining primary adult mammalian non-pancreatic cells;(c) propagating and expanding the cells of step (b) to a predetermined number of cells; (i) infecting said expanded cells with an adenoviral vector comprising a nucleic acid encoding a human PDX-1 polypeptide;', '(ii) infecting said expanded cells of step (i) with an adenoviral vector comprising a nucleic acid encoding a second human pancreatic transcription factor polypeptide; and', '(iii) infecting said expanded cells of step (ii) with an adenoviral vector comprising a nucleic acid encoding a human MafA polypeptide;, '(d) transdifferentiating the cells of step (c); wherein said transdifferentiating comprisesand a step of attaching at least a subset of said cells to said scaffold after step (b), (c), or (d);thereby generating a 3D cell cluster comprising transdifferentiated mammalian non-pancreatic beta insulin producing cells, wherein at least a subset of said cells are attached to said scaffold.18. (canceled)19. The method of claim 1 , wherein said second ...

Подробнее
09-04-2020 дата публикации

Visible light polymerization of polyethylene glycol (peg) hydrogels

Номер: US20200109372A1
Принадлежит: Stem Pharm Inc

Provided herein are compositions and methods for generating visible light photopolymerized hydrogels to support cell viability, expansion, and encapsulation. The present disclosure provides a composition, comprising a visible light harvesting complex, a photoinitiator, a co-initiator, a di-thiol-terminated crosslinker, and at least one cysteine-containing peptide. The present disclosure provides a method of generating a visible light photopolymerized hydrogel. In further embodiments that method comprises generating a 3-dimensional endothelial network comprising the visible light photopolymerized hydrogel. In additional embodiments the method comprises generating a hydrogel network comprising the visible light photopolymerized hydrogel comprising at least one cell.

Подробнее
07-05-2015 дата публикации

Systems and method for engineering muscle tissue

Номер: US20150125952A1

The present invention generally relates to the field of cell growth and tissue engineering, in particular, tissue engineered compositions comprising a nanotextured substrate which is structurally configured for growth of cells in an anatomically correct adult phenotype in vitro. In particular, described herein are nanotextured substrates which are structurally configured for the anisotropic organization, maturation, and growth of in vitro-differentiated muscle cells, such as cardiomyocytes, and methods for the production and use thereof in varying sizes, nanotextures and substrate rigidities. In vitro-differentiated cardiomyocytes grown on the nanotextured substrates described herein are better-differentiated and more closely mimic adult cardiac tissue than the same cells grown on a non-textured substrate of the same composition. The nanotextured substrate/cell constructs provide a platform for screening to predict the effect of test agents or drugs on, for example, human cardiac tissue, including patient-derived tissue, or for the identification of agents that effect various cardiac functional parameters.

Подробнее
12-05-2016 дата публикации

MATRIX AND IMPLANT FOR TISSUE ENGINEERING

Номер: US20160130558A1
Автор: BAER Hans U.
Принадлежит:

A porous matrix for tissue engineering has a first biodegradable and biocompatible polymer component forming a three-dimensional primary structure with primary pores, and further includes a second biodegradable and biocompatible polymer component other than the first polymer component selected from the group of collagens, laminin, fibronectin and mixtures thereof, wherein the second polymer component forms a three-dimensional secondary structure with secondary pores, the secondary structure being contained within the interior space of at least a part of the primary pores. 1. A porous matrix for tissue engineering comprising a first biodegradable and biocompatible polymer component forming a three-dimensional primary structure with primary pores , and further comprising a second biodegradable and biocompatible polymer component other than the first polymer component selected from the group consisting of collagens , laminin , fibronectin and mixtures thereof , wherein the second polymer component forms a three-dimensional secondary structure with secondary pores , the secondary structure being contained within the interior space of at least a part of the primary pores.2. Matrix according to claim 1 , wherein the first polymer component is selected from the group consisting of poly(glycolic acid) claim 1 , poly(lactic acid) claim 1 , poly(glycolic acid-lactic acid) and mixtures thereof.3. Matrix according to claim 1 , wherein the second polymer component is collagen.4. Matrix according to claim 1 , wherein the primary pores have an average pore size diameter of 150 μm to 300 μm.5. Matrix according to claim 4 , wherein the secondary pores have an average pore size diameter smaller than the average pore size diameter of the primary pores and being in the range from 50 μm to 290 μm.6. Matrix according to claim 1 , comprising a porous base layer and a porous cell-embedding layer claim 1 , the average pore size of the pores in the base layer being smaller than the one of ...

Подробнее
01-09-2022 дата публикации

DISSOLVABLE AND DEGRADABLE ARTIFICIAL CIRCULATION SYSTEMS FOR LARGE VOLUME TISSUES

Номер: US20220275342A1
Автор: Lei Yuguo, Li Qiang, WANG Ou
Принадлежит:

Embodiments of the disclosure provide a dissolvable or degradable artificial circulation system for engineering, culturing, and integrating large volume tissues. Also provided are methods of using large engineered tissues prepared using the degradable artificial circulation system for clinical applications and for various applications such as large-scale production of therapeutic or consumable products, drug discovery, and toxicity screening. 1. A method for preparing a large engineered tissue , the method comprising(a) seeding cells onto a three-dimensional scaffold comprising one or more hollow biomaterial tubes, each tube comprising a first tube end and a second tube end;(b) circulating a culture medium through the hollow biomaterial tubes, wherein circulating comprising forming a fluid circuit between the one or more hollow biomaterial tubes and a directional fluid pumping device comprising a first inlet, a second inlet, and a reservoir, wherein the first tube end is in fluid contact with the first inlet and the second tube end is in fluid contact with the second inlet, and wherein the first and second inlets introduce the culture medium from the reservoir into one or more hollow biomaterial tubes; and(c) culturing the seeded scaffold under conditions that promote one or more of proliferation, differentiation, and maturation of the seeded cells to form an engineered tissue having a thickness greater than 1 mm in at least one dimension.2. The method of claim 1 , wherein the scaffold comprises a plurality of hollow biomaterial tubes claim 1 , each hollow biomaterial tube spaced apart to support efficient nutrient diffusion throughout the whole engineered tissue.3. The method of claim 1 , wherein the cells are cell spheroids and seeding comprises placing the cell spheroids between hollow biomaterial tubes of the scaffold.4. The method of claim 1 , wherein seeding comprises placing single cells adjacent to an outer surface of the one or more hollow biomaterial tubes ...

Подробнее
21-05-2015 дата публикации

THREE-DIMENSIONAL CELL CULTURE SYSTEM AND MANUFACTURING METHOD THEREOF

Номер: US20150140659A1
Принадлежит: NATIONAL TAIWAN UNIVERSITY

A three-dimensional cell culture system for an imaging system to observe a cell image includes at least two cell culture layers formed by a solution having a photo-polymerizable monomer, a bio-molecule, an acoustic scattering medium solution and a cell culture medium. After placing a cell into the two cell culture layers, the two cell culture layers are laminated to form a three-dimensional culture laminating layer for culturing the cell. After forming the three-dimensional culture laminating layer, at least one cell-locating layer having a polyethylene glycol diacrylate (PEGDA) solution, the acoustic scattering medium solution, a plurality of photoacoustic markers and the cell culture medium is positioned into the three-dimensional culture laminating layer so as to form the three-dimensional cell culture system. The imaging system is constructed according to a theory selected from one of optics, acoustics, optoacoutics and acousto-optics. 1. A three-dimensional cell culture system , applying an imaging system to observe at least one cell image of cells to be tested , comprising:at least two cell culture layers, formed by a polymer solution having at least one monomer capable of photo-polymerization, a first polymerized solution formed by polymerizing bio-molecules capable of providing cell recognition and providing signals to one of the cells, a second polymerized solution formed by polymerizing an acrylate, a polyethylene glycol and a cell adhesive peptide (CAP), an acoustic scattering medium solution and a cell culture medium, wherein the at least two cell culture layers are laminated to form a unique three-dimensional culture laminating layer for culturing the cells to be tested; andat least one cell-locating layer, formed by a polyethylene glycol diacrylate (PEGDA) solution, the acoustic scattering medium solution, a plurality of photoacoustic markers and the cell culture medium, wherein the at least one cell-locating layer having a preset shape and a preset ...

Подробнее
18-05-2017 дата публикации

Tissue-engineered constructs

Номер: US20170135805A1
Принадлежит: Humacyte Inc

The present invention provides constructs including a tubular biodegradable polyglycolic acid scaffold, wherein the scaffold may be coated with extracellular matrix proteins and substantially acellular. The constructs can be utilized as an arteriovenous graft, a coronary graft, a peripheral artery bypass conduit, or a urinary conduit. The present invention also provides methods of producing such constructs.

Подробнее
04-06-2015 дата публикации

Bioerodible Wraps and Uses There

Номер: US20150150673A1
Принадлежит: University of Pittsburgh

A tubular tissue graft device is provided comprising a tubular tissue and a restrictive fiber matrix of a bioerodible polymer about a circumference of the tubular tissue. The matrix may be electrospun onto the tubular tissue. In one embodiment, the tubular tissue is from a vein, such as a saphenous vein, useful as an arterial graft, for example and without limitation, in a coronary artery bypass procedure. Also provided is method of preparing a tubular graft comprising depositing a fiber matrix of a bioerodible polymer about a perimeter of a tubular tissue to produce a tubular tissue graft device. A cardiac bypass method comprising bypassing a coronary artery with a tubular tissue graft device comprising a vein and a restrictive fiber matrix of a bioerodible polymer about a circumference of the vein also is provided.

Подробнее
15-09-2022 дата публикации

METHODS AND SYSTEMS FOR CELL CULTURE

Номер: US20220290086A1
Принадлежит:

Provided herein are methods for the preparation of perfusable scaffolds for cell culture. These methods can comprise providing a bioink composition and a fugitive ink composition; chaotic printing the bioink composition and the fugitive ink composition to generate a microstructured precursor comprising a plurality of lamellar structures formed from the bioink composition; curing the bioink composition to form a cured scaffold precursor; and removing the fugitive ink from the cured scaffold precursor, thereby forming the perfusable scaffold. Also provided are scaffolds prepared by these methods as well as modular bioreactors incorporating these scaffolds. 1. A method for the preparation of a perfusable scaffold for cell culture , the method comprising:providing a bioink composition and a fugitive ink composition;chaotic printing the bioink composition and the fugitive ink composition to generate a microstructured precursor comprising a plurality of lamellar structures formed from the bioink composition;curing the bioink composition to form a cured scaffold precursor; andremoving the fugitive ink from the cured scaffold precursor, thereby forming the perfusable scaffold.2. The method of claim 1 , wherein the method further comprises dispersing a population of cells in the bioink composition prior to the chaotic printing.3. The method of claim 1 , wherein the method further comprises seeding the perfusable scaffold with a population of cells.4. The method of any of - claim 1 , wherein the cells comprise pluripotent stem cells claim 1 , multipotent stem cells claim 1 , progenitor cells claim 1 , terminally differentiated cells claim 1 , endothelial cells claim 1 , endothelial progenitor cells claim 1 , immortalized cell lines claim 1 , primary cells claim 1 , or any combination thereof.5. The method of any of - claim 1 , wherein chaotic printing of the bioink composition and the fugitive ink composition comprises inducing laminar flow of the bioink composition and the ...

Подробнее
17-06-2021 дата публикации

Systems and methods for producing injectable enhanced stem cell exosomes, improved exosomes and methods of use

Номер: US20210180024A1
Принадлежит: Florida International University FIU

This disclosure pertains to a non-living biological product. Particularly, exosomes derived from stem cells can help restore heart function. According to certain embodiments, a fluid-induced shear stress mechanical stimulation process of stem cells is used to augmented quantity and quality of exosomes produced from stem cells. These exosomes serve as a therapeutic agent for the regenerative repair of diseases, such as diseased heart tissues. Therefore, compositions comprising the exosomes derived from stem cells and methods of treating a degenerative disease by administering the exosomes isolated from stem cells are also provided.

Подробнее
14-05-2020 дата публикации

CELL CULTERING MATERIALS

Номер: US20200148999A1
Принадлежит:

A material for binding to a cell culturing protein is disclosed. The material contains a bulk-modified elastomer comprising a plurality of fatty acid moieties covalently bound to the elastomer bulk, wherein the carboxylic acid groups of said moieties are available to provide said binding. Also disclosed are a fluidic device module, a cell culturing scaffold, a fluidic device, the method of synthesizing such a material and a drug testing method. With such a material, a (monolithic) fluidic device module may be manufactured in as few as a single step injection molding process. 1. A material for binding to a cell culturing protein , the material comprising a bulk-modified elastomer ,wherein the bulk-modified elastomer comprises a plurality of fatty acid moieties covalently bound to the elastomer bulk,wherein the carboxylic acid groups of the moieties are available to provide the binding.2. The material of claim 1 , wherein each of the fatty acid moieties is covalently bound to the elastomer bulk through a cross-linking reaction between a vinyl or hydride functional group of the elastomer and an unsaturated carbon-carbon bond of an unsaturated fatty acid.3. The material of claim 2 , wherein the unsaturated fatty acid is selected from the group consisting of myristoleic acid claim 2 , palmitoleic acid claim 2 , sapienic acid claim 2 , oleic acid claim 2 , elaidic acid claim 2 , vaccenic acid claim 2 , linoleic acid claim 2 , linoeladic acid claim 2 , α-linolenic acid claim 2 , arachidonic acid claim 2 , eicospaentaenoic acid claim 2 , erucic acid and docosahexaenoic acid.4. The material of any of claim 1 , wherein the elastomer comprises a polybutadiene backbone or a silicone backbone.5. The material of claim 4 , wherein at least a fraction of the carboxylic acid groups within the silicone backbone is saponified.6. A cell culturing scaffold comprising the material of any of and a cell culturing protein bound to at least some of the carboxylic acid groups.7. The cell ...

Подробнее
16-06-2016 дата публикации

OSTEOINDUCTIVE MATERIALS

Номер: US20160166736A1
Автор: Curran Judith, Hunt John
Принадлежит: THE UNIVERSITY OF LIVERPOOL

Provided is an osteoinductive material comprising a substrate; and a layer of a hydrocarbyl group comprising 10 to 12 carbon atoms, the hydrocarbyl group having one end attached to the substrate and a presenting amine (—NH2) group at the unattached end. The hydrocarbyl group may be 11 carbons long, and may be provided in the form of 11-aminoundecyltriethoxysilane. The substrate may be a glass; metal; polymer; ceramic; plastic; or hydroxyapatite. The substrate may, for example, be a metal selected from the group consisting of: titanium; titanium alloys; cobalt chrome; and steel. An osteoinductive material may be provided in the form of a medical implant, or part thereof, such as an orthopaedic implant or a dental implant or part thereof. Alternatively the substrate may be in the form of a cell culture vessel. Also provided is a method of producing such osteoinductive materials, the medical use of such materials, and a method of producing bone or a bone precursor utilising the disclosed materials. 1. An osteoinductive material comprising:a substrate; anda layer of a hydrocarbyl group comprising 10 to 12 carbon atoms, the hydrocarbyl group having one end attached to the substrate and a presenting amine (—NH2) group at the unattached end.2. An osteoinductive material according to claim 1 , wherein the hydrocarbyl group is straight.3. An osteoinductive material according to claim 1 , wherein the hydrocarbyl group is an 11 carbon alkyl chain.4. An osteoinductive material according to claim 1 , wherein the wherein the hydrocarbon is attached to the substrate via a Si—O—Si bond.5. An osteoinductive material according to claim 1 , wherein the hydrocarbyl group is substantially the only hydrocarbon present on a hydrocarbyl group-coated surface of the osteoinductive material.6. An osteoinductive material according to claim 1 , comprising multiple layers of the hydrocarbyl group and presenting amine.7. An osteoinductive material according to claim 6 , wherein the multiple ...

Подробнее
21-05-2020 дата публикации

TEXTILE GROWTH MATRIX FOR CELLS

Номер: US20200157493A1
Принадлежит:

A engineered textile construction includes a first textile having a first average pore size forming a textile cell growth matrix in which the first textile is a woven or a knit construction, the textile cell growth matrix is configured to have a surface area sufficient to promote cell expansion and the first average pore size is preselected to prevent filling of the pores during cell expansion. 1. An engineered textile construction comprising: wherein the first textile is a woven or a knit construction;', 'wherein the textile cell growth matrix is configured to have a surface area sufficient to promote cell expansion; and', 'wherein the first average pore size is preselected to prevent filling of the pores during cell expansion., 'a first textile having a first average pore size forming a textile cell growth matrix;'}2. The textile cell growth matrix system of :wherein fibers of the first textile are coated with a continuous or discontinuous resorbable material.3. The engineered textile construction system of :wherein the resorbable material includes at least one of polycaprolactone (PCL), polylactic acid (PLA), polyglycolic acid (PGA), poly(glycerol sebacate) (PGS), lysine-poly(glycerol sebacate) (KPGS), poly(glycerol sebacate urethane) (PGSU), amino-acid incorporated PGS, or acrylated poly(glycerol sebacate) (PGSA).4. The engineered textile construction system of :wherein the first textile layer comprises resorbable fibers.5. The engineered textile construction system of :wherein the resorbable fibers include at least one of polycaprolactone (PCL), polylactic acid (PLA), polyglycolic acid (PGA), poly(lactic-co-glycolic acid) (PLGA), poly(glycerol sebacate) (PGS), lysine-poly(glycerol sebacate) (KPGS), acrylated poly(glycerol sebacate) (PGSA), poly(trimethylene carbonate) (PTMC), poly(dioxanone) (PDO), collagen, fibrin, alginate, or silk.6. The engineered textile construction of :wherein the first textile consists of resorbable fibers.7. The engineered textile ...

Подробнее
25-06-2015 дата публикации

THREE DIMENSIONAL MATRIX FOR CANCER STEM CELLS

Номер: US20150175972A1
Автор: JABBARI ESMAIEL
Принадлежит:

Synthetic inert 3D gel culture systems are described that can be finely tuned to exhibit desired and predetermined physical, chemical, mechanical, and biochemical properties. The culture system can be utilized to study the effect of microenvironmental factors on cancer cell response, and in particular on cancer stem cell (CSC) response. Cancer cells can be encapsulated in a crosslinked gel system having a narrow range of predetermined gel stiffness. One or more biochemical factors including peptides that can affect the growth, development, and/or proliferation of CSCs can be incorporated in the system to examine the effects of the factor(s) on the encapsulated cells with regard to growth, proliferation, size, etc. 1. A method of forming a three dimensional hydrogel matrix for supporting a cancer cell , the method comprising:combining an inert synthetic polymer with a crosslinking agent to form a precursor solution;crosslinking the inert synthetic polymer via the crosslinking agent to form the three dimensional hydrogel matrix, wherein the concentration of the crosslinking agent and/or the concentration of the inert synthetic polymer is predetermined in the precursor solution such that the three dimensional hydrogel matrix has a predetermined elastic modulus; andconjugating a peptide to the matrix, the peptide affecting the growth, development, and/or proliferation of a cancer stem cell.2. The method of claim 1 , wherein the inert synthetic polymer comprises polyethylene glycol claim 1 , polyhydroxyethyl methacrylate claim 1 , polyvinylolypyrrolidone claim 1 , or polyvinyl alcohol.3. The method of claim 1 , wherein the inert synthetic polymer is combined with and reacted with the crosslinking agent prior to crosslinking the polymer.4. The method of claim 1 , further comprising encapsulating a population of cells in the three dimensional hydrogel matrix claim 1 , the population of cells comprising cancer stem cells.5. The method of claim 4 , the population of cells ...

Подробнее
21-06-2018 дата публикации

DRYING FORMULATON FOR HYDROGEL MICROCARRIERS

Номер: US20180171301A1
Принадлежит:

A method of making a cell culture article is provided. The method includes forming a microcarrier from a microcarrier composition comprising a polygalacturonic acid compound or an alginic acid compound, infiltrating the microcarrier with a drying formulation to form an infiltrated microcarrier, and drying the infiltrated microcarrier to form a dried microcarrier, wherein the drying formulation comprises at least one of a saccharide and a monovalent cation. 1. A method of making a cell culture article , the method comprising:forming a microcarrier from a microcarrier composition comprising a polygalacturonic acid compound or an alginic acid compound;infiltrating the microcarrier with a drying formulation to form an infiltrated microcarrier; anddrying the infiltrated microcarrier to form a dried microcarrier, wherein the drying formulation comprises at least one of a saccharide and a monovalent cation.2. The method according to claim 1 , further comprising sterilizing the dried microcarrier to form a sterilized dried microcarrier.3. The method according to claim 2 , wherein sterilizing the dried microcarrier comprises exposing the dried microcarrier to gamma radiation.4. The method according to claim 1 , further comprising rehydrating the microcarrier.5. The method according to claim 1 , wherein infiltrating the microcarrier with a drying formulation comprises soaking the microcarrier in a solution of the drying formulation.6. The method claim 1 , wherein infiltrating the microcarrier with a drying formulation comprises simultaneously spraying the microcarrier composition and the drying formulation.7. The method according to claim 1 , wherein the drying formulation comprises 1 to 50 wt. % saccharide.8. The method according to claim 1 , wherein the drying formulation comprises 10 to 500 mM monovalent cation.9. The method according to claim 1 , wherein the drying formulation comprises 1 to 50 wt. % saccharide and 10 to 500 mM monovalent cation.10. The method according ...

Подробнее
28-05-2020 дата публикации

SURFACE-MODIFIED POLYMER SCAFFOLDS AND USES THEREOF

Номер: US20200165575A1
Принадлежит:

Compositions and methods are disclosed for producing polymer scaffolds for tissue engineering and drug testing. The scaffolds comprise a high molecular weight polymer having an external surface functionalized with a low molecular weight polymer to which cell surface binding molecules are attached for enhancing cell adherence to the scaffold. 1. A method of forming a tissue construct , comprising:(a) providing a scaffold comprising a non-water soluble high molecular weight (highMW) polymer, wherein the highMW polymer has a weight average molecular weight (Mw) of at least 5,000 Da;(b) solubilizing an external surface layer of the scaffold with an organic solvent comprising a low molecular weight (lowMW) polymer dissolved therein, wherein the lowMW polymer comprises a terminal amine or carboxyl group, and wherein the lowMW polymer has a weight average molecular weight (Mw) of less than 5,000 Da;(c) incubating the solubilized scaffold for a duration of time sufficient to enable a portion of the lowMW polymer to become entrapped in the external surface layer of the scaffold, thereby forming a functionalized scaffold, wherein the lowMW polymer in the scaffold is substantially restricted to the external surface layer of the scaffold;(d) treating the functionalized scaffold with a linker molecule which binds to the terminal amine or carboxyl group of the lowMW polymer on the external surface layer, forming a linker-modified functionalized scaffold;(e) treating the linker-modified functionalized scaffold with a cell adhesion molecule which binds to the linker on the external surface layer, forming cell adhesion-modified scaffold; and(f) seeding the cell adhesion-modified scaffold with a plurality of cells and incubating the cells on the cell adhesion-modified scaffold for a time sufficient to cause adherence of the cells thereto, forming the tissue construct.2. The method of claim 1 , further comprising immediately following step (c) with a step of exposing the ...

Подробнее
08-07-2021 дата публикации

DRYING FORMULATION FOR HYDROGEL MICROCARRIERS

Номер: US20210207098A1
Принадлежит:

A method of making a cell culture article is provided. The method includes forming a microcarrier from a microcarrier composition comprising a polygalacturonic acid compound or an alginic acid compound, infiltrating the microcarrier with a drying formulation to form an infiltrated microcarrier, and drying the infiltrated microcarrier to form a dried microcarrier, wherein the drying formulation comprises at least one of a saccharide and a monovalent cation. 113-. (canceled)14. A cell culture article comprising:a polygalacturonic acid compound or an alginic acid compound; anda drying formulation comprising at least one of a saccharide and a monovalent cation,wherein the cell culture article is free of water.15. The cell culture article according to claim 14 , wherein the drying formulation comprises 1 to 50 wt. % saccharide.16. The cell culture article according to claim 14 , wherein the drying formulation comprises 0.5 to 20 wt. % monovalent cation.17. The cell culture article according to claim 14 , wherein the drying formulation comprises 1 to 50 wt. % saccharide and 0.5 to 20 wt. % monovalent cation.18. The cell culture article according to claim 14 , wherein the drying formulation comprises a non-volatile liquid material.19. The cell culture article according to claim 18 , wherein the non-volatile liquid material is selected from the group consisting of DMSO and a low molecular weight polyethylene glycol.20. The cell culture article according to claim 14 , wherein the polygalacturonic acid compound or the alginic acid compound is cross-linked with calcium.21. The cell culture article of claim 14 , wherein the cell culture article comprises a microcarrier comprising the polygalacturonic acid compound or the alginic acid compound claim 14 , wherein the drying formulation is infiltrated into the microcarrier.22. The cell culture article of claim 14 , wherein the drying formulation comprises 10 to 500 mM monovalent cation.23. The cell culture article of claim 14 , ...

Подробнее
28-06-2018 дата публикации

3D PRINTED TRANS-MODULAR SCAFFOLDS FOR GRAFTING APPLICATIONS IN SEGMENTAL BONE DEFECTS

Номер: US20180177597A1

A bone repair scaffold having two moduli that match those of the cancellous and cortical bone in a patient receiving a bone graft/implant. The bone repair scaffold possesses increased mechanical properties to sustain physiological loading and biologically active capability to facilitate bone fusion. The bone repair scaffold may be 3D-printed, which allows for a variety of scaffold designs and configurations. Pore size, interconnected porosity, shape, and modulus of the bone repair scaffold may be modified for different bone graft applications, whether it is used as filler for bone cancer resections or trauma, or as a fusion device in cases of surgery. Depending on the defect location of the bone shaft, the relative porosity of the scaffold may be modified to account for changes in cortical bone thickness. A method for treating a bone defect using the bone repair scaffold is also disclosed. 1. A bone repair scaffold , comprising an inner core and an outer core circumferentially engaging said inner core , said inner core having a first porosity and a first modulus , and said outer core having a second porosity and a second modulus , wherein said second porosity is lower than said first porosity , whereby said second modulus is greater than said first modulus.2. The bone repair scaffold of claim 1 , wherein said first modulus is similar to that of cancellous bone claim 1 , and wherein said second modulus is similar to that of cortical bone.3. The bone repair scaffold of claim 1 , wherein said first porosity claim 1 , said second porosity and a transition between said first and second porosities constitute a pattern that emulates the porosity pattern of bone.4. The bone repair scaffold of claim 1 , further comprising a plurality of horizontal conduits and a plurality of vertical conduits claim 1 , so as to emulate the internal architecture of bone.5. The bone repair scaffold of claim 4 , wherein said plurality of horizontal conduits includes a first set of horizontal ...

Подробнее
15-07-2021 дата публикации

GRAPHENE OXIDE-BASED POROUS 3D MESH

Номер: US20210214678A1
Принадлежит: University of North Dakota

A method of making a porous three-dimensional graphene mesh includes combining a graphene-containing material and a polymer having a plurality of hydroxyl groups in an alcohol solvent to form a mixture, adding a salt to the mixture, heating the mixture to form a gel, and washing the gel with water to remove the salt from the gel, leaving behind stable pores to form a scaffold. A three-dimensional porous graphene mesh includes a graphene-containing material and a polymer. The polymer is crosslinked with the graphene-containing material such that the Young's Modulus of the mesh is at least about 5 GPa. 1. A stable three-dimensional material matrix comprising:a graphene-containing material;a polymer, wherein the polymer is crosslinked with the graphene-containing material; andsalt crystals integrated with the graphene-containing material and polymer.210. The three-dimensional material matrix of claim , wherein the crosslinked graphene-containing material and polymer form a scaffold around the salt crystals.3. A three-dimensional porous graphene mesh comprising:a graphene-containing material; anda polymer, wherein the polymer is crosslinked with the graphene-containing material such that the Young's Modulus of the mesh is at least about 5 GPa.412. The three-dimensional graphene mesh of claim , wherein the mesh has a porosity between about 50% and about 90%.512. The three-dimensional graphene mesh of claim , wherein an average pore size of the mesh is between about 5 μm and about 50 μm. This application is a divisional of U.S. application Ser. No. 16/774,921 filed Jan. 28, 2020 for “GRAPHENE OXIDE-BASED POROUS 3D MESH” by Y. Zhang, J. Zhao, and D. Darland, which in turn claims the benefit of and is a continuation of U.S. application Ser. No. 15/917,045 filed Mar. 9, 2018 for “GRAPHENE OXIDE-BASED POROUS 3D MESH” by Y. Zhang, J. Zhao, and D. Darland, now U.S. Pat. No. 10,808,220, which in turn claims the benefit of U.S. Provisional Application No. 62/469,367 filed Mar. 9, ...

Подробнее
07-07-2016 дата публикации

A FLAP FOR DE-NOVO TISSUE REGENERATION

Номер: US20160193382A1
Принадлежит:

The present invention provides an implant which includes: (a) an autologous engineered tissue; and (b) a vasculature, wherein the engineered tissue is a porous scaffold embedded with endothelial cell, a fibroblast, a myoblast, a mesenchymal cell, an adipocyte, or any combination thereof, wherein the vasculature feeds the cells. Further, the invention provides a method for treating a subject afflicted with a large soft tissue defect by implanting the implant of the invention. 1. An implant comprising: (a) an engineered tissue; and (b) an autologous vasculature , wherein said engineered tissue comprises a porous scaffold embedded with cells comprising an endothelial cell , a fibroblast , a myoblast , a mesenchymal cell , an adipocyte , or any combination thereof , wherein said vasculature feeds said cells.2. The implant of claim 1 , wherein said engineered tissue comprises a porous scaffold embedded with: an endothelial cell and a cell expressing CD73and CD105.3. The implant of claim 2 , wherein said engineered tissue further comprises a myoblast.4. The implant of claim 1 , wherein said porous scaffold comprises poly-l-lactic acid (PLLA) and polylactic-co-glycolic-acid (PLGA).5. The implant of claim 1 , wherein said vasculature comprises an autologous vein and an autologous artery.6. The implant of claim 1 , wherein said implant is configured to repair a large soft tissue defect or a full-thickness abdominal wall defect.7. (canceled)8. The implant of claim 1 , wherein said porous scaffold comprises a diameter of 150 to 800 μm.9. (canceled)10. The implant of claim 1 , wherein said porous scaffold comprises at least 85% porosity.11. The implant of claim 1 , wherein said porous scaffold comprises fibrin claim 1 , fibronectin claim 1 , thrombin claim 1 , or any combination thereof.1221-. (canceled)22. A process for making an implant comprising: (a) an engineered tissue; and (b) an autologous vasculature claim 1 , wherein said engineered tissue comprises a porous scaffold ...

Подробнее
11-06-2020 дата публикации

Biomimetic double network hydrogels

Номер: US20200181564A1
Принадлежит: Stichting Katholieke Universiteit

A double network hydrogel including a polymer (A) having a persistence length between 10 and 1000 nm; a flexible polymer (B), wherein the persistence length is measured according to single molecule force microscopy measurement, wherein polymer (B) has an extended coil conformation at a first condition and a collapsed globular conformation at a second condition. Polymer (A) preferably is a polyisocyanate, while polymer (B) is a crosslinked flexible polymer like for example PNIPAM. A method for making a double network hydrogel.

Подробнее
11-06-2020 дата публикации

ELECTROACTIVE POLYMERIC SCAFFOLDS AND METHOD FOR DELIVERING NERVE GROWTH FACTOR TO NERVE TISSUE

Номер: US20200181570A1
Принадлежит:

A polymerizable unit that yields an electrochemically responsive polymer (advantageously pyrrole) is anchored by polymerization within a polycaprolactone matrix to form an electroactive scaffold upon which cells can be cultured and in which the micro- and nano-topological features of the polycaprolactone matrix are preserved. A scaffold manufactured in accordance with the preferred embodiment can support Schwann cells, which produce nerve growth factor when electrically stimulated. Nerve growth factor has been demonstrated to promote the regeneration of nerve tissue. By implanting the scaffold on which Schwann cells have been cultured into damaged nerve tissue and applying a voltage across the scaffold, nerve growth factor is produced, thereby promoting repair of the damaged nerve tissue. 118.-. (canceled)19. An electroactive tissue scaffold , comprising:a. a polycaprolactone matrix; andb. a polymerizable unit yielding an electrochemically responsive polymer located in the pores of the matrix and anchored thereto by polymerization.20. The scaffold of claim 19 , wherein the scaffold is biodegradable.21. The scaffold of claim 19 , wherein the polymerizable unit yielding an electrochemically responsive polymer is an aromatic compound.22. The scaffold of claim 21 , wherein the aromatic compound is heterocyclic.23. The scaffold of claim 22 , wherein the heterocyclic aromatic compound is a pyrrole.24. The scaffold of claim 19 , wherein the polymerizable unit yielding an electrochemically responsive polymer is selected from a group consisting of:a. an aniline;b. an aniline derivative;c. a furan;d. a furan derivative;e. a thiophene;f. a thiophene derivative;g. ferrocene;h. a ferrocene derivative;i. a porphyrin; andj. a porphyrin derivative.25. The scaffold of claim 24 , wherein 1 the polymerizable unit yielding an electrochemically responsive polymer is selected from a group consisting of:a. 3,4-ethylenedioxythiophene; andb. a derivative of 3,4-ethylenedioxythiophene.26. ...

Подробнее
12-07-2018 дата публикации

Three-Dimensional Fibrous Scaffolds for Cell Culture

Номер: US20180195037A1
Принадлежит: UNIVERSITY OF SOUTH FLORIDA

Provided herein is a three-dimensional scaffold composition comprising randomly oriented fibers, wherein the fibers comprise a polyethylene glycol-polylactic acid block copolymer (PEG-PLA) and a poly(lactic-co-glycolic acid) (PLGA). Also provided are methods for using the three-dimensional scaffolds described herein. 1. A three-dimensional scaffold composition comprising randomly oriented fibers , wherein the fibers comprise a polyethylene glycol-polylactic acid block copolymer (PEG-PLA) and a poly(lactic-co-glycolic acid) (PLGA).2. The composition of claim 1 , wherein the ratio of PEG-PLA to PLGA is approximately 1:4.3. The composition of claim 1 , wherein the ratio of PEG-PLA to PLGA is approximately 1:10.4. The composition of claim 1 , wherein fiber diameter ranges from approximately 0.69 to 4.18 μm.5. The composition of claim 1 , wherein the scaffold comprises pores having a diameter of less than approximately 10 μm.6. The composition of claim 1 , wherein the PEG has a molecular weight of approximately 2 kDa.7. The composition of claim 1 , wherein the PLGA has a lactic acid:glycolic acid ratio of approximately 85:15.8. The composition of claim 1 , wherein the PEG has a molecular weight of approximately 2 kDa claim 1 , and wherein the PLGA has a lactic acid:glycolic acid ratio of approximately 85:15.9. The composition of claim 1 , wherein the fibers consist essentially of a polyethylene glycol-polylactic acid block copolymer (PEG-PLA) and a poly(lactic-co-glycolic acid) (PLGA).10. The composition of claim 9 , wherein the ratio of PEG-PLA to PLGA is approximately 1:4.11. The composition of claim 9 , wherein the ratio of PEG-PLA to PLGA is approximately 1:10.12. The composition of claim 9 , wherein the PEG has a molecular weight of approximately 2 kDa.13. The composition of claim 9 , wherein the PLGA has a lactic acid:glycolic acid ratio of approximately 85:15.14. The composition of claim 9 , wherein the PEG has a molecular weight of approximately 2 kDa claim 9 , ...

Подробнее
18-06-2020 дата публикации

AZLACTONE BASED THERMALLY CROSSLINKABLE POLYMER COATING FOR CONTROLLING CELL BEHAVIOR

Номер: US20200190353A1
Принадлежит:

Random copolymers, crosslinked thin films of the random copolymers and cell culture substrates comprising the crosslinked thin films are provided. Also provided are methods of making and using the copolymers, thin films and substrates. The copolymers are polymerized from glycidyl methacrylate monomers and vinyl azlactone monomers. The crosslinked thin films are substrate independent, in that they need not be covalently bound to a substrate to form a stable film on the substrate surface. 2. The cell culture substrate of claim 1 , wherein the copolymer comprises from about 1 to about 15 mole percent of the monomers that provide covalent crosslinks between the backbone chains and from about 99 to about 85 mole percent of the polymerized monomers comprising covalently linked peptide chains.4. The cell culture substrate of claim 1 , wherein the film has a thickness no greater than about 30 nm.5. The cell culture substrate of claim 1 , wherein the substrate is a polymeric substrate.6. The cell culture substrate of claim 4 , wherein the film is not covalently bound to the substrate.7. A method of culturing stem cells using the cell culture substrate of claim 1 , the method comprising seeding the stem cells onto the cell culture substrate and culturing the seeded stem cells in a cell culture medium under cell culturing conditions.9. The coated substrate of claim 8 , wherein the random copolymer comprises from about 1 to about 15 mole percent of the polymerized monomers that provide covalent crosslinks between the backbone chains claim 8 , from about 15 to about 60 mole percent of the polymerized 4 claim 8 ,4-dimethyl-2-vinylazlactone monomer claim 8 , from about 30 to about 85 mole percent of the polymerized polyethylene glycol methyl ether methacrylate monomer claim 8 , and no greater than about 30 mole percent of additional monomer.11. The cell culture substrate of claim 10 , wherein the random copolymer comprises from about 1 to about 15 mole percent of the polymerized ...

Подробнее
28-07-2016 дата публикации

POROUS STRUCTURE FOR STEM CELL PURIFICATION AND STEM CELL CULTURE AND METHOD OF MANUFACTURING THE SAME, STEM CELL PURIFICATION DEVICE AND METHOD OF STEM CELL PURIFICATION, STEM CELL CULTIVATION DEVICE AND METHOD OF STEM CELL CULTIVATION

Номер: US20160215266A1
Автор: HIGUCHI AKON
Принадлежит:

A porous structure for purifying and culturing stem cells includes a substrate. The substrate has a plurality of pores. A pore diameter of the substrate ranges between 8 to 50 μm, and a material of the substrate is selected from silk, modified fiber, polyester fiber, polyurethane fiber and the combination thereof. 2. The porous structure of claim 1 , wherein the silk includes silkworm silk claim 1 , spider silk and the combination thereof.4. The method of claim 3 , wherein the silk includes silkworm silk claim 3 , spider silk and the combination thereof.5. The method of claim 3 , wherein the first organic solvent is dimethyl sulfoxide (DMSO).6. The method of claim 3 , wherein the PLGA solution has a PLGA concentration ranging between 3-15 wt %.7. The method of further comprising soaking the substrate in the PLGA solution at −20° C. for 24 hours.8. The method of further comprising soaking the PLGA/silk porous structure made of the PLGA layer and the silk in a second organic solvent at −20° C. for three days claim 3 , wherein the second organic solvent is changed twice a day to obtain an intermediate.9. The method of claim 8 , wherein the second organic solvent is 75% (v/v) ethanol solution.10. The method of further comprising:drying the intermediate at a ventilating condition for three days; andresting the intermediate at a vacuum condition to dry for 24 hours to obtain the porous structure.13. The method of purifying stem cells of claim 12 , wherein in the step of providing the primary cell mixture further comprises decomposing a adipose tissue by a collagenase claim 12 , wherein the primary cell mixture contains human adipose derived stem cells (hADSCs).14. The method of purifying stem cells of claim 12 , wherein the eluate contains human adipose derived stem cells (hADSCs).15. The method of purifying stem cells of claim 12 , wherein the recovered solution contains human adipose derived stem cells (hADSCs).16. The method of purifying stem cells of claim 12 , ...

Подробнее
13-08-2015 дата публикации

Surface Modified Polymeric Nanofiber Substrates By Plasma-Treatment and Fabrication Process for The Same

Номер: US20150225892A1

A method of modifying a surface of a polymeric nanofiber, for example, a polymeric nanofiber mat, is provided. For surface modification of the polymeric nanofiber by plasma treatment, a method capable of forming a surface of the polymeric nanofiber on nano-scaled patterns using a remarkably simple method in which the polymeric nanofiber is subjected to plasma treatment in a state in which an AAO template is placed on the polymeric nanofiber is provided. Ultimately, the invention for obtaining a biomaterial for tissue regeneration applications by providing micro-environmental conditions, which are more desirable to initial attachment and growth of cells, to a surface of the polymeric nanofiber is disclosed. 1. A method of modifying a surface of a polymeric nanofiber , comprising:performing plasma treatment on the polymeric nanofiber to modify a surface of the polymeric nanofiber,wherein the plasma treatment is performed in a state in which an anodic aluminum oxide template is placed on the polymeric nanofiber.2. The method of claim 1 , wherein the polymeric nanofiber is a polymeric nanofiber mat.3. The method of claim 1 , wherein the polymeric nanofiber comprises at least one selected from the group consisting of polycaprolactone (PCL) claim 1 , poly(lactic acid) (PLA) claim 1 , poly(glycolic acid) (PGA) claim 1 , poly(lactic acid-co-glycolic acid) (PLGA) claim 1 , and a mixture thereof.4. The method of claim 3 , wherein the polymeric nanofiber comprises polycaprolactone (PCL).5. The method of claim 1 , wherein the plasma treatment is low-frequency oxygen plasma treatment.6. The method of claim 1 , wherein the plasma treatment is performed for 120 minutes to 240 minutes under conditions of a frequency of 50 kHz claim 1 , a power of 10 to 30 W claim 1 , an oxygen flow rate of 10 to 15 sccm claim 1 , and a pressure of 5.1×10to 5.4×10Torr.7. The method of claim 1 , wherein the anodic aluminum oxide template has a plurality of holes having an average diameter of 100 to ...

Подробнее
03-08-2017 дата публикации

THREE-DIMENSIONAL FIBROUS SCAFFOLDS FOR CELL CULTURE

Номер: US20170219564A1

Provided herein is a three-dimensional scaffold composition comprising randomly oriented fibers, wherein the fibers comprise a polyethylene glycol-polylactic acid block copolymer (PEG-PLA) and a poly(lactic-co-glycolic acid) (PLGA). Also provided are methods for using the three-dimensional scaffolds described herein. 1. A composition comprising:(i) a three-dimensional scaffold of randomly oriented fibers, wherein said fibers are electrospun from a mixture comprising a polyethylene glycol-polylactic acid block copolymer (PEG-PLA) and a poly(lactic-co-glycolic acid) (PLGA); and(ii) a population of cells isolated from a tumor of an animal or human, wherein said population of cells is inoculated onto said scaffold without prior incubation of the cells in a cell culture medium.2. The composition of claim 1 , wherein the ratio of PEG to PLA is from about 1:2 to about 1:20.3. The composition of claim 2 , wherein the ratio of PEG to PLA is from about 1:4 to about 1:10.4. The composition of claim 3 , wherein fiber diameter ranges from about 0.3 μm to about 10 μm.5. The composition of claim 1 , wherein the scaffold comprises pores having a diameter between about 5 mm to about 20 μm.6. The composition of claim 5 , wherein the scaffold comprises pores having a diameter of less than about 10 μm.7. The composition of claim 1 , wherein the PEG has a molecular weight of about 2 kDa.8. The composition of claim 1 , wherein the PLGA has a lactic acid:glycolic acid ratio of between about 75:25 to about 95:.9. The composition of claim 8 , wherein the PLGA has a lactic acid:glycolic acid ratio of about 85:15.10. The composition of claim 1 , wherein the population of cells comprises a population of cancerous cells and stromal cells isolated from a tumor of an animal or human subject.11. The composition of claim 1 , wherein said composition is incubated in a cell culture medium claim 1 , and wherein the population of cells is a tumoroid.12. The composition of claim 11 , wherein the ...

Подробнее
02-07-2020 дата публикации

A RELIABLE AND REPRODUCIBLE INDUSTRIALISATION PROCESS FOR THE ELIMINATION OF AIR BUBBLES IN THE PRODUCTION OF AN ENGINEERED VASCULAR TISSUE

Номер: US20200208117A1
Принадлежит:

The present invention refers to a reliable and reproducible industrialisation method for the elimination of air bubbles in the production of an engineered vascular tissue for in vitro testing of medical products for human use and veterinary products for animal use. 121. A process for the production of an engineered vascular tissue or construct , preferably a scaffold () having a lumen coated with a functional and continuous endothelium having a confluent cell monolayer , for testing medical or veterinary products , said process comprising the application of:{'b': 21', '21', '21', '11', '11', '21, 'a method for seeding an endothelial cell culture into the lumen of a scaffold () to yield a seeded scaffold (); said seeded scaffold () being present inside a bioreactor (), to yield a seeded bioreactor ()-scaffold () system;'}wherein said seeding method comprises the steps of:{'b': 91', '11, 'releasing said endothelial cell culture in the form of a cell suspension comprising a fresh culture medium and endothelial cells inside a container () mounted on a T connector (T2) located upstream of the bioreactor () by a rotary connector (CR1); followed by'}{'b': 21', '11', '21', '11, 'releasing said endothelial cell culture into the lumen of the scaffold () inside the bioreactor chamber () with a continuous flow such that the flow velocity permits said cell suspension to descend into the T connector (T2) without generating air bubbles and push the air bubbles inside the lumen of the scaffold () towards an opening of a T connector (T3) located downstream of the bioreactor () enabling them to exit;'}and successively,{'b': 21', '51', '56', '51', '57', '11', '21, 'a perfusion method with a fresh culture medium having a temperature between 30° C. and 45° C., preferably 37° C., of the endothelial cells present in the lumen of said seeded scaffold (); said perfusion method being realised by the connection of a perfusion circuit (-) or (- and BT) to said seeded bioreactor ()-scaffold () ...

Подробнее
12-08-2021 дата публикации

TISSUE-ENGINEERED CONSTRUCTS

Номер: US20210246419A1
Принадлежит: Humacyte, Inc.

The present invention provides constructs including a tubular biodegradable polyglycolic acid scaffold, wherein the scaffold may be coated with extracellular matrix proteins and substantially acellular. The constructs can be utilized as an arteriovenous graft, a coronary graft, a peripheral artery bypass conduit, or a urinary conduit. The present invention also provides methods of producing such constructs. 1. A method of producing a tubular construct comprising:(a) providing a tubular biodegradable polyglycolic acid (PGA) construct having an inner diameter of about 3 mm to about 6 mm and a length of 1 cm to 100 cm, wherein the tubular PGA construct comprises entangled PGA fibers, wherein the density of the PGA is about 45 mg/cc to about 75 mg/cc, and wherein said density is uniform across the entire tubular PGA construct,(b) seeding human cells at passage 10 or less on the tubular biodegradable polyglycolic acid construct,(c) culturing the cells under conditions such that the cells secrete extracellular matrix proteins on the tubular biodegradable polyglycolic acid construct, wherein the cells are cultured in medium comprising human serum,(d) decellularizing the construct in step (c) such that the construct is substantially acellular comprising less than 5% intact cells and wherein the construct is calcification resistant, and(e) degrading the polyglycolic acid construct in step (c) such that the polyglycolic acid comprises less than 5% of the cross-sectional area of said construct,wherein the construct has an extracellular matrix protein thickness greater than about 200 μm at the thinnest portion of the construct,wherein the construct induces less than 1 mm of intimal hyperplasia thickening in native vasculature at anastomoses with the construct at 6 months of implantation, andwherein the construct does not dilate greater than 50% beyond its implant diameter after implantation, thereby producing a decellularized tubular construct.2. The method of claim 1 , wherein ...

Подробнее
27-08-2015 дата публикации

BONE TISSUE REGENERATION SHEET AND PRODUCTION METHOD THEREOF

Номер: US20150240207A1
Принадлежит: GC Corporation

To provide a bone tissue regeneration sheet having a cortical bone tissue layer of 200 μm or more in thickness, the bone tissue regeneration sheet is produced by seeding chondroblast or stem cells for differentiating to chondrocyte on one side of a porous bioabsorbable polymer sheet, taking the seeded porous body into a culture medium, applying centrifugal force of 100 to 1000 G to the culture medium for a predetermined time so as to aggregate the chondroblast or the stem cells for differentiating to chondrocyte, culturing the aggregated cells in a culture medium not containing serum but containing one or two or more kinds selected from ascorbic acid, an ascorbic acid derivative, and dexamethasone without applying centrifugal force to form a chondrocyte layer having a thickness of 200 μm or more. 1. (canceled)2. A production method of a bone tissue regeneration sheet , the method comprising:forming a chondrocyte layer having a thickness of 200 μm or more on one side of a porous bioabsorbable polymer sheet; andmaking endochondral ossification of the chondrocyte so as to form a cortical bone tissue layer having a thickness of 200 μm or more.3. The production method of a bone tissue regeneration sheet as claimed in claim 2 , wherein the method for forming a chondrocyte layer having a thickness of 200 μm or more on one side of a porous bioabsorbable polymer sheet comprises:seeding chondrocyte or stem cells for differentiating to chondrocyte on one side of a porous bioabsorbable polymer sheet;taking the seeded porous body into a culture medium;applying centrifugal force of 100 to 1000 G to the culture medium for a predetermined time so as to aggregate the chondroblast or the stem cells for differentiating to chondrocyte;culturing thereafter the aggregated cells in a culture medium not containing serum but containing one or two or more kinds selected from ascorbic acid, an ascorbic acid derivative, and dexamethasone without applying centrifugal force to the culture medium ...

Подробнее
06-11-2014 дата публикации

pH-RESPONSIVE CELL SCAFFOLD AND METHOD OF USING SAME

Номер: US20140328789A1
Принадлежит:

A pH-responsive cell scaffold for growing a cell culture is disclosed. The cell scaffold has pores in which biological cells may be disposed. As the pH of the local environment drops, the cell scaffold swells to draw in additional oxygen and/or other nutrients. The increased supply of oxygen and/or nutrients increases the longevity of the cells. In some embodiments, the cell scaffold induces a change in gene expression that promotes wound healing. 1. A pH-responsive cell scaffold comprising:a polymeric scaffold formed from a polymerization reaction of a reaction mixture comprising a pH-nonresponsive monomer and a pH-responsive monomer, the polymerization reaction forming a copolymer with a first pKa between about 5 and about 7.5; anda plurality of pores in the polymeric scaffold, wherein the polymeric scaffold swells when exposed to an environment with a pH below the first pKa.2. The cell scaffold as recited in claim 1 , wherein the pH-nonresponsive monomer is characterized by its corresponding homopolymer having a pKa outside of a range of about 5 and about 7.5 while the pH-responsive monomer is characterized by its corresponding homopolymer having a pKa inside of the range of about 5 and about 7.5.3. The cell scaffold as recited in claim 1 , wherein the pH-responsive monomer has a tertiary amine.4. The cell scaffold as recited in claim 1 , wherein the first pKa is between about 6.5 and about 7.5.5. The cell scaffold as recited in claim 4 , wherein the pH-nonresponsive monomer is characterized by its corresponding homopolymer having a pKa outside of a range of about 6.5 and about 7.5 while the pH-responsive monomer is characterized by its corresponding homopolymer having a pKa inside of the range of about 6.5 and about 7.5.6. The cell scaffold as recited in claim 1 , further comprising a plurality of biological cells disposed in at least some of the pores of the plurality of pores.7. The cell scaffold as recited in claim 1 , wherein the pH-responsive monomer and ...

Подробнее
26-08-2021 дата публикации

Measurement method

Номер: US20210263015A1

The present invention provides a method for measuring the propagation of electric activity in neural network and/or axon by using a nerve cell device produced by seeding nerve cells on an oriented fiber sheet. According to the present invention, synapse function can be assessed by using propagation speed of neural network as an index.

Подробнее
10-09-2015 дата публикации

Methods, Apparatus, and Systems for Fabrication of Polymeric Nano-and Micro-Fibers in Aligned Configurations

Номер: US20150252322A1
Автор: Nain Amrinder Singh
Принадлежит:

Provided herein are apparatus and systems for fabricating highly aligned arrays of polymeric fibers having isodiameters ranging from sub 50 nm to microns with lengths of several millimeters. The approach disclosed herein uses (e.g.) a micropipette to deliver polymeric solution which is collected in the form of aligned fibers on a rotating and linearly translating substrate. The methods deposit polymeric fibers on spherical surfaces and gapped surfaces with precise control, thus heralding new opportunities for a variety of applications employing polymeric fibers. The design workspace for depositing fibers disclosed herein is dependent upon processing parameters of rotational/linear translational speeds and material properties of solution rheologies. Techniques for fabrication of multilayer fiber arrays, for fabrication of cell growth scaffolds and for attachment of particles to the fiber arrays are also disclosed. 157-. (canceled)58. A scaffold comprising one or more layers of one or more high aspect ratio , bead-free polymer fibers having a diameter of between about 10 nm and 10 μm , wherein the polymer is one or more of a polystyrene , a polyester , a polyurethane , a polyacrylamide , a poly(methyl methacrylate) , a polylactic acid , a poly(lactic-co-glycolic acid) , a poly(caprolactone) , fibrinogen , collagen , and mixtures and copolymers thereof.59. The scaffold of claim 58 , wherein the fibers are formed into one or more bundles of substantially parallel fibers.60. The scaffold of claim 58 , wherein the fibers are formed into one of more bundles of substantially criss-crossed fibers claim 58 , or fibers deposited in any orientation.61. The scaffold of claim 58 , wherein the scaffold comprises two or more layers of fibers.62. The scaffold of claim 61 , wherein one layer is substantially parallel to other layers.63. The scaffold of claim 61 , wherein one layer is substantially criss-crossed to other layers claim 61 , or is in any other non-parallel orientation to ...

Подробнее
30-08-2018 дата публикации

METHOD FOR INDUCING DIFFERENTIATION OF STEM CELLS

Номер: US20180245049A1
Принадлежит:

A cell culture including a cell culturing medium for growing stem cells, a three-dimensional (3D) cell growth matrix and stem cells, wherein the cell culture has a critical stress σof 2-30 Pa, wherein the critical stress is a stress which marks an onset of strain stiffening and wherein the cell culture has a storage modulus G′ measured at 37° C. of 50-1000 Pa. 1. A cell culture comprising:a) a cell culturing medium for growing stem cells,b) a three-dimensional (3D) cell growth matrix andc) stem cells,{'sub': 'c', 'wherein the cell culture has a critical stress σof 2-30 Pa, wherein the critical stress is a stress which marks an onset of strain stiffening and'}{'sub': 'c', 'wherein the cell culture has a storage modulus G′ measured at 37° C. of 50-1000 Pa, preferably σranges between 5-25 Pa and G′ measured at 37° C. ranges between 70-400 Pa.'}2. The cell culture according to claim 1 , wherein the 3D cell growth matrix comprises at least one of Matrigel® claim 1 , Puramatrix® claim 1 , Raft® 3D claim 1 , Insphero® claim 1 , Bioactive 3D® claim 1 , Cellusponge® claim 1 , Optimaix® and GroCell-3D® scaffolds.3. The cell culture according to claim 1 , wherein the 3D cell growth matrix comprises an oligo(alkylene glycol) substituted co-polyisocyanopeptide.4. The cell culture according to claim 3 , wherein a concentration of the polyisocyanopeptide in the 3D cell growth matrix is 1-5 mg/ml.5. The cell culture according to claim 3 , wherein an average length of the polyisocyanopeptide is 250-680 nm as determined by AFM.6. The cell culture according to claim 3 , wherein the polyisocyanopeptide has a cell adhesion factor covalently bound to the polyisocyanopeptide and/or the cell culturing medium comprises fibrin claim 3 ,wherein when the polyisocyanopeptide has a cell adhesion factor covalently bound to the polyisocyanopeptide, the average distance between the cell adhesion factors along the polyisocyanopeptide backbone is 10-50 nm.7. A method for inducing differentiation of ...

Подробнее
08-09-2016 дата публикации

Three-dimensional cell culture using nanofiber slurries and nano-structured substrates

Номер: US20160257927A1
Принадлежит: UCL BUSINESS LTD

The present invention provides a method of culturing cells and/or controlling cell behaviour, which method comprises: (a) introducing one or more cells into a medium; and (b) allowing said one or more cells to grow within and/or interact with the medium, wherein said medium comprises a three dimensional homogeneous distribution of shear-spun nanofibers.

Подробнее
30-07-2020 дата публикации

NANOFIBER-BASED LONG-TERM PRIMARY HEPATOCYTE THREE-DIMENSIONAL CULTURE SYSTEM AND CULTURING METHOD

Номер: US20200239851A1

Disclosed is a nanofiber-based long-term primary hepatocyte culture system and a culture method, wherein the primary hepatocyte culture system has an advantage that it can culture cells in three-dimensions in vitro to maintain the original physiological activity of low proliferative primary hepatocytes for a long time by co-culturing indirectly by separating primary hepatocytes and hepatic non-parenchymal cells with a support consisting of nanofibers therebetween without direct co-culture. 1. A three-dimensional culture system of primary hepatocyte comprising:a first layer in which primary hepatocytes are cultured on a support consisting of polyvinyl alcohol (PVA) nanofibers; anda second layer in which liver non-parenchymal cells are cultured on a support consisting of polycaprolactone (PCL) nanofibers,wherein the first layer and the second layer are stacked adjacently.2. The three-dimensional culture system of primary hepatocyte of claim 1 , wherein the support consisting of PVA nanofibers comprises a cell adhesion factor so as to improve adhesion of the primary hepatocytes thereon.3. The three-dimensional culture system of primary hepatocyte of claim 1 , wherein the support consisting of PCL nanofibers comprises a cell adhesion factor so as to improve adhesion of the hepatic non-parenchymal cells thereon.4. The three-dimensional culture system of primary hepatocyte of claim 3 , wherein the cell adhesion factor is fucoidan.5. The three-dimensional culture system of primary hepatocyte of claim 1 , wherein seeding density of the primary hepatocytes is 1×10to 3×10cells/cm claim 1 , and a disk-shaped spheroid is formed by culturing while attached on the nanofibers.6. The three-dimensional culture system of primary hepatocyte of claim 1 , wherein the culture system prevents a direct co-culture between the primary hepatocytes and the hepatic non-parenchymal cells and induces an indirect co-culture.7. The three-dimensional culture system of primary hepatocyte of claim 1 , ...

Подробнее
30-07-2020 дата публикации

CARTILAGE TISSUE PRODUCING METHOD AND CARTILAGE TISSUE

Номер: US20200239856A1
Принадлежит:

The present invention aims to provide a method for producing a cartilage tissue, which enables production of a cartilage tissue having an appropriate thickness, form, and mechanical strength, and a cartilage tissue produced by the method for producing a cartilage tissue. Provided is a method for producing a cartilage tissue including a step of seeding a collagenase-treated cartilage tissue piece in the form of a block 50 to 1,000 μm on a side onto a porous substrate composed of a bioabsorbable material. 1. A method for producing a cartilage tissue comprisinga step of seeding a collagenase-treated cartilage tissue piece in the form of a block 50 to 1,000 μm on a side onto a porous substrate composed of a bioabsorbable material.2. The method for producing a cartilage tissue according to claim 1 ,wherein the cartilage tissue piece is in the form of a block 100 to 800 μm on a side.3. The method for producing a cartilage tissue according to claim 1 ,wherein the porous substrate is a nonwoven fabric having an average pore size of 20 to 50 μm.4. The method for producing a cartilage tissue according to claim 1 ,wherein the bioabsorbable material constituting the porous substrate is polyglycolide.5. The method for producing a cartilage tissue according to claim 1 ,wherein the porous substrate is fixed to a mold composed of a bioabsorbable material to combine and integrate with the mold.6. The method for producing a cartilage tissue according to claim 5 ,wherein the bioabsorbable material constituting the mold is polycaprolactone.7. A cartilage tissue comprisinga porous substrate composed of a bioabsorbable material anda collagenase-treated cartilage tissue piece in the form of a block 50 to 1,000 μm on a side seeded on the porous substrate. The present invention relates to a method for producing a cartilage tissue, which enables production of a cartilage tissue having an appropriate thickness, form, and mechanical strength, and to a cartilage tissue produced by the method ...

Подробнее
30-07-2020 дата публикации

STRETCHABLE SKIN-ON-A-CHIP

Номер: US20200239857A1
Принадлежит:

Disclosed is a skin-on-a-chip, which more closely resembles real skin by simulating the repetition of contraction and relaxation due to stretching of skin cells, by embedding a permanent magnet in the skin-on-a-chip. The skin-on-a-chip includes a connector that causes a linear motion in the skin cells of the chip when driven by a linear drive device outside the chip, which provides forward and backward movement, to thereby simulate contraction and relaxation of skin. 1. (canceled)2. (canceled)3. A skin-on-a-chip , comprising:a base layer;a lower layer disposed on the base layer and configured to include a microfluidic channel and a membrane; andan upper layer disposed on the lower layer and configured to include a culture medium chamber, a skin cell culture chamber for three-dimensionally culturing skin cells, and a connector that causes a linear motion in the skin cells of the chip when driven by a linear drive device outside the chip, which provides linear forward and backward movement,wherein the skin cell culture chamber contains a support for three-dimensional culture of skin cells,wherein the connector is at one side of the skin cell culture chamber,wherein the membrane is positioned below the skin cell culture chamber in the upper layer, preventing the skin cells from being the skin cells from being immersed in the culture medium,wherein the microfluidic channel is supplying the culture medium and oxygen to the skin cells and recovering waste materials and carbon dioxide from the skin cells by connection the membrane and the culture medium chamber.4. The skin-on-a-chip of claim 3 , wherein the connector is mechanically claim 3 , electrically or magnetically connected to the linear drive device outside the chip.5. (canceled)6. The skin-on-a-chip of claim 3 , wherein the base layer is made of a material comprising or consisting of glass or a transparent synthetic polymer.7. (canceled)8. (canceled)9. (canceled)10. (canceled)11. The skin-on-a-chip of claim 3 , ...

Подробнее
06-09-2018 дата публикации

TISSUE-ENGINEERED CONSTRUCTS

Номер: US20180251727A1
Принадлежит: Humacyte, Inc.

The present invention provides constructs including a tubular biodegradable polyglycolic acid scaffold, wherein the scaffold may be coated with extracellular matrix proteins and substantially acellular. The constructs can be utilized as an arteriovenous graft, a coronary graft, a peripheral artery bypass conduit, or a urinary conduit. The present invention also provides methods of producing such constructs. 1. A method of producing a tubular construct comprising:(a) providing a tubular biodegradable polyglycolic acid (PGA) construct having an inner diameter of about 3 mm to about 6 mm and a length of 1 cm to 100 cm, wherein the tubular PGA construct comprises entangled PGA fibers, wherein the density of the PGA is about 45 mg/cc to about 75 mg/cc, and wherein said density is uniform across the entire tubular PGA construct,(b) seeding human cells at passage 10 or less on the tubular biodegradable polyglycolic acid construct,(c) culturing the cells under conditions such that the cells secrete extracellular matrix proteins on the tubular biodegradable polyglycolic acid construct, wherein the cells are cultured in medium comprising human serum,(d) decellularizing the construct in step (c) such that the construct is substantially acellular comprising less than 5% intact cells and wherein the construct is calcification resistant, and(e) degrading the polyglycolic acid construct in step (c) such that the polyglycolic acid comprises less than 5% of the cross-sectional area of said construct, and wherein the construct has an extracellular matrix protein thickness greater than about 200 μm at the thinnest portion of the construct; wherein the construct induces less than 1 mm of intimal hyperplasia thickening in native vasculature at anastomoses with the construct at 6 months of implantation, and wherein the construct does not dilate greater than 50% beyond its implant diameter after implantation, thereby producing a decellularized tubular construct.2. The method of claim 1 , ...

Подробнее
24-09-2015 дата публикации

HUMAN ENDOCRINE PROGENITORS FROM ADULT PANCREATIC TISSUE

Номер: US20150265656A1
Автор: Shamblott Michael J.
Принадлежит:

The present invention relates to the field of progenitor cells. More specifically, the present invention provides compositions and methods for isolating endocrine progenitor cells from pancreatic tissue. In certain embodiments, the method comprises the steps of (a) providing a pancreatic tissue sample; (b) isolating cells positive for CD133+; and (c) culturing the isolated cells in defined media for at least about 4 days. 1. A method for isolating a population of endocrine progenitor cells comprising the steps of:a. providing a pancreatic tissue sample;b. isolating cells positive for CD133+; andc. culturing the isolated cells in defined media for at least about 4 days.2. The method of claim 1 , wherein the isolation step is carried out using immunomagnetic beads.3. The method of claim 1 , wherein the isolation step is accomplished using fluorescence-activate cell sorting (FACS).4. The method of claim 3 , further comprising selecting for Aldefluor-positive cells prior to the culturing step.5. The method of claim 1 , further comprising selecting for SSEA-4+ cells prior to the culturing step.6. A substantially pure population of CD133+ cells isolated by the method of claim 1 , wherein the cells are also NGN3+.7. A population of cells comprising at least about 90% endocrine progenitor cells claim 1 , wherein the progenitor cells have the phenotype CD133+.8. The population of cells of claim 7 , wherein the progenitor cells have the phenotype NGN3+.9. The population of cells of claim 7 , wherein the progenitor cells are ALDH+.10. The population of cells of claim 7 , wherein the progenitor cells are SSEA-4+.11. The population of cells of claim 7 , wherein the progenitor cells are capable of clonal pancosphere formation.12. A method for differentiating human endocrine progenitors comprising the steps of:a. suspending CD133+/NGN3+ cells in a matrix;b. mixing the cells-matrix with in a fiber mesh; andc. differentiating the cells into CPEP+ cells.13. The method of claim 12 , ...

Подробнее
06-08-2020 дата публикации

PACKED-BED BIOREACTOR SYSTEMS AND METHODS OF USING THE SAME

Номер: US20200248121A1
Принадлежит:

A cell culture matrix is provided that has a substrate with a first side, a second side opposite the first side, a thickness separating the first side and the second side, and a plurality of openings formed in the substrate and passing through the thickness of the substrate. The plurality of openings allow flow of at least one of cell culture media, cells, or cell products through the thickness of the substrate, and provides a uniform, efficient, and scalable matrix for cell seeding, proliferation, and culturing. The substrate can be formed from a woven polymer mesh material that provides a high surface area to volume ratio for cells and good fluid flow through the matrix. Bioreactor systems incorporating the cell culture matrix and related methods are also provided. 1. A bioreactor system comprising:a cell culture vessel comprising at least one reservoir; anda cell culture matrix disposed in the at least one reservoir, the cell culture matrix comprising a woven substrate having a plurality of interwoven fibers with surfaces configured for adhering cells thereto.2. The system of claim 1 , wherein the woven substrate comprises a uniform arrangement of the plurality of interwoven fibers.3. The system of claim 1 , wherein the woven substrate comprises a plurality of openings disposed between the plurality of fibers.4. The system of claim 1 , wherein the fibers comprise at least one of polystyrene claim 1 , polyethylene terephthalate claim 1 , polycarbonate claim 1 , polyvinylpyrrolidone claim 1 , polybutadiene claim 1 , polyvinylchloride claim 1 , polyethylene oxide claim 1 , polypyrroles claim 1 , and polypropylene oxide.5. The system of claim 1 , wherein the cell culture matrix comprises a plurality of woven substrates.6. The system of claim 5 , wherein the substrates of the plurality of substrates are arranged adjacent to each other such that one of the first and second side of a substrate is adjacent to other of the first or second side of an adjacent substrate.7. ...

Подробнее
06-08-2020 дата публикации

GRAPHENE OXIDE-BASED POROUS 3D MESH

Номер: US20200248135A1
Принадлежит: University of North Dakota

A method of making a porous three-dimensional graphene mesh includes combining a graphene-containing material and a polymer having a plurality of hydroxyl groups in an alcohol solvent to form a mixture, adding a salt to the mixture, heating the mixture to form a gel, and washing the gel with water to remove the salt from the gel, leaving behind stable pores to form a scaffold. A three-dimensional porous graphene mesh includes a graphene-containing material and a polymer. The polymer is crosslinked with the graphene-containing material such that the Young's Modulus of the mesh is at least about 5 GPa. 1. A method of making a porous three-dimensional graphene mesh , the method comprising:combining a graphene-containing material and a polymer having a plurality of hydroxyl groups in an alcohol solvent to form a mixture;adding a salt to the mixture;heating the mixture to form a gel; andwashing the gel with water to remove the salt from the gel leaving behind stable pores to form a scaffold.2. The method of claim 1 , wherein the graphene-containing material comprises graphene oxide (GO).3. The method of claim 2 , wherein the graphene-containing material comprises a dispersion of graphene oxide (GO) in ethanol.4. The method of claim 1 , wherein the mixture is heated to a temperature between about 60° C. and about 85° C. for between about 1 hour and about 36 hours to form the gel.5. The method of claim 1 , further comprising:drying the gel at a temperature between about 40° C. and about 70° C. for between about 1 hour and about 24 hours.6. The method of claim 1 , wherein the graphene-containing material and the polymer are combined at a graphene:polymer weight ratio between 1:1 and 1:3.12.7. The method of claim 1 , wherein the scaffold has a porosity between about 50% and about 90%.8. The method of claim 1 , wherein an average pore size of the scaffold is between about 5 μm and about 50 μm.9. The method of claim 1 , wherein the alcohol solvent is methanol claim 1 , ethanol ...

Подробнее
04-12-2014 дата публикации

BIODEGRADABLE AND BIOCOMPATIBLE NANO COMPOSITE T-PLATE IMPLANT AND A METHOD OF SYNTHESIZING THE SAME

Номер: US20140356410A1
Принадлежит:

The embodiments herein provide a biodegradable and biocompatible T-plate nano-composite implant with stem cells for treating and repairing broken bones, damaged tissues and torn ligaments. The implant comprises a polymeric matrix part comprising poly lactic glycolic acids (PLGA), a bioceramic part comprising hydroxyapatite (HAp) nanoparticles and an endometrial stem cell. The PLGA and HAp nanoparticles act as a matrix and reinforcing agents respectively. A method is provided for synthesizing the T-plate implant. The method comprises synthesizing hydroxyapatite (HAp) nanoparticles, poly lactic glycolic acids (PLGA) and HAp nano composite implant. The casting of the poly lactic glycolic acids (PLGA) and HAp nano composite are done in a mold to obtain a T-plate nano composite. An endometrial stem cell from an epithelial cell lining from uterus is isolated and cultured. The endometrial stem cells are implanted on the nano-composite implant. 2. The implant according to claim 1 , wherein the poly lactic glycolic acid (PLGA) acts as a matrix and the hydroxyapatite (HAp) nanoparticles act as reinforcing agents.3. The implant according to claim 1 , wherein the hydroxyapatite (HAp) nanoparticles have a spherical shape or a needle like shape within the polymeric matrix part.4. The implant according to claim 1 , wherein the T-plate nano-composite implant has a Young's modulus of 157 MPa.5. The T-plate nano-composite implant according to claim 1 , wherein the endometrial stem cells on the nano-composite have a viability of 82%.6. The T-plate nano-composite implant according to claim 1 , wherein the nano-composite has an osteo-conductive property.7. The T-plate nano-composite implant according to claim 1 , wherein the nano-composite is non-toxic.8. The T-plate nano-composite implant according to claim 1 , wherein the nano-composite is environmental friendly.9. A method for synthesizing biodegradable and biocompatible nano-composite T-plate implant claim 1 , the method comprising ...

Подробнее
22-08-2019 дата публикации

HYDROGEL ENCAPSULATED CELLS AND ANTI-INFLAMMATORY DRUGS

Номер: US20190254975A1
Принадлежит:

A composition containing biocompatible hydrogel encapsulating mammalian cells and anti-inflammatory drugs is disclosed. The encapsulated cells have reduced fibrotic overgrowth after implantation in a subject. The compositions contain a biocompatible hydrogel having encapsulated therein mammalian cells and anti-inflammatory drugs or polymeric particles loaded with anti-inflammatory drugs. The anti-inflammatory drugs are released from the composition after transplantation in an amount effective to inhibit fibrosis of the composition for at least ten days. Methods for identifying and selecting suitable anti-inflammatory drug-loaded particles to prevent fibrosis of encapsulated cells are also described. Methods of treating a disease in a subject are also disclosed that involve administering a therapeutically effective amount of the disclosed encapsulated cells to the subject. 1. A composition comprisinga biocompatible hydrogel having encapsulated therein(a) one or more mammalian secretory, metabolic or structural cells; and(b) one or more anti-inflammatory drugs bound within or to the composition, encapsulated in or on polymeric particles dispersed on or within the biocompatible hydrogel, or a combination thereof;wherein the anti-inflammatory drug is released from the composition after implantation in a mammalian subject in an amount effective to prevent detectable fibrosis of the composition for at least 10 days, more preferably 14, 30, 60, or 90 days.2. The composition of claim 1 , comprising(a) a core comprising a biocompatible hydrogel,(b) an envelope comprising a biocompatible hydrogel, and(c) optionally a membrane separating the core and the envelope,wherein the one or more mammalian cells are encapsulated in the core,wherein the anti-inflammatory drugs or drug-loaded polymeric particles are encapsulated within the envelope, within the core, or within the envelope and the core.3. The composition of claim 2 , wherein the membrane comprises polycation crosslinked ...

Подробнее
22-09-2016 дата публикации

Azlactone based thermally crosslinkable polymer coating for controlling cell behavior

Номер: US20160272840A1
Принадлежит: WISCONSIN ALUMNI RESEARCH FOUNDATION

Random copolymers, crosslinked thin films of the random copolymers and cell culture substrates comprising the crosslinked thin films are provided. Also provided are methods of making and using the copolymers, thin films and substrates. The copolymers are polymerized from glycidyl methacrylate monomers and vinyl azlactone monomers. The crosslinked thin films are substrate independent, in that they need not be covalently bound to a substrate to form a stable film on the substrate surface.

Подробнее
29-08-2019 дата публикации

METHOD FOR MANUFACTURING THREE-DIMENSIONAL CELL CULTURE SUPPORT HAVING DOUBLE CROSSLINK, AND CASTING TRAY FOR MANUFACTURING THREE-DIMENSIONAL CELL CULTURE SUPPORT

Номер: US20190264251A1
Автор: CHA Mi Sun
Принадлежит:

The present disclosure relates to a method for manufacturing a three-dimensional cell culture support having a double crosslink, and a casting tray for manufacturing the three-dimensional cell culture support, wherein the method for manufacturing the three-dimensional cell culture support having the double crosslink includes: producing a cell mixed hydrogel; manufacturing a casting gel mold in a three-dimensional shape; and manufacturing a structure gelated in a three-dimensional shape, and the casting tray for manufacturing the three-dimensional cell culture support includes: a tray part including a groove accommodating a gel solution; a mold part covering the tray part; and a mold protrusion provided on the mold part and inserted into the groove when the mold part covers the tray part. 1. A method for manufacturing a three-dimensional cell culture support having a double crosslink , comprising:producing a cell mixed hydrogel;manufacturing a casting gel mold in a three-dimensional shape; anddispersing the cell mixed hydrogel into the casting gel mold manufactured in the three-dimensional shape and gelating the cell mixed hydrogel to manufacture a structure gelated in a three-dimensional shape.2. The method of claim 1 , wherein the producing of the cell mixed hydrogel comprises:mixing gelatin with alginate to prepare a mixed solution;filtering the mixed solution to produce a hydrogel; andmixing the hydrogel with cells.3. The method of claim 2 , wherein the mixed solution is one selected from a group consisting of apatite claim 2 , cellulose claim 2 , gellan claim 2 , agarose claim 2 , chitosan claim 2 , keratin claim 2 , and collagen claim 2 , or claim 2 , a combination of two or more of apatite claim 2 , cellulose claim 2 , gellan claim 2 , agarose claim 2 , chitosan claim 2 , keratin claim 2 , and collagen.4. The method of claim 2 , wherein the mixed solution is one selected front a group consisting of a transforming growth factor (TGF) claim 2 , a vascular ...

Подробнее
27-08-2020 дата публикации

Cellular or Viral Membrane Coated Nanostructures and Uses Thereof

Номер: US20200268892A1
Принадлежит:

The present invention relates to viral or cellular membrane coated nanostructures. Nanostructure networks, nanoscaffolds and articles of manufacture comprising the nanostructure, and uses thereof, are also provided. The present invention also relates to methods for anchoring, attaching and/or growing a target cell. Target cells, constituent(s) of the target cells, target substances made by the target cells or culture medium of the target cells prepared by the present methods, and uses thereof, are also provided. 1178.-. (canceled)179. A nanostructure comprising:a) an inner core comprising a non-cellular or non-viral material; andb) an outer surface comprising a membrane derived from a cell or a virus, wherein said nanostructure has a first dimension ranging from about 1 nm to about 10 μm, a second dimension at least about 11 μm, and a ratio between said second dimension and said first dimension of at least about 2.180. The nanostructure of claim 179 , wherein the non-cellular or non-viral material comprises a polymer.181. The nanostructure of claim 180 , wherein the polymer comprises poly(lactic-co-glycolic acid) (PLGA) claim 180 , polylactic acid (PLA) claim 180 , poly(1-lactic acid) (PLLA) claim 180 , polyglycolic acid (PGA) claim 180 , polycaprolactone (PCL) claim 180 , polylysine claim 180 , polyglutamic acid claim 180 , poly(ethylene-co-vinyl acetate) (EVOH) claim 180 , poly(vinyl acetate) (PVA) claim 180 , polyethylene glycol (PEG) claim 180 , poly(glycerol sebacate) (PGS) claim 180 , polydioxanone (PDO) claim 180 , polyphosphazenes claim 180 , polyurethane (PU) claim 180 , or a combination thereof.182. The nanostructure of claim 179 , wherein the inner core supports the outer surface.183. The nanostructure of claim 179 , wherein the membrane is derived from a human cell.184The nanostructure of claim 183 , wherein the membrane is derived from a cell of a connective tissue claim 183 , e.g. claim 183 , a blood claim 183 , a bone claim 183 , a tendon claim 183 , ...

Подробнее
25-12-2014 дата публикации

SYNTHETIC SCAFFOLDS AND ORGAN AND TISSUE TRANSPLANTATION

Номер: US20140377863A1
Принадлежит:

A synthetic scaffold for replacing at least a portion of an airway includes an airway mold, one or more structural ribs on the airway mold, and a non-structural wall. Each of the one or more structural ribs is formed from a first material and the non-structural wall is formed from a second material. The non-structural wall coats the airway mold and forms a conduit that incorporates the one or more structural ribs. 1. A method of seeding a synthetic airway scaffold , the method comprising incubating a synthetic airway scaffold in a rotating bioreactor in the presence of a cellular solution.2. The method of claim 1 , wherein the cells of the cellular solution are mesenchymal cells.3. The method of claim 3 , wherein the incubating is at a temperature of about 30° C.4. The method of claim 1 , wherein cells of the cellular solution are obtained from human bone marrow.5. The method of claim 1 , wherein the incubating lasts for 1-3 days.6. The method of claim 5 , wherein the incubating lasts for 2 days.7. The method of claim 2 , further comprising adding epithelial cells.8. The method of further comprising adding epithelial cells.9. The method of claim 1 , wherein the incubating is at a temperature of between about 25° C. and 37° C.10. The method of claim 2 , wherein the incubating is at a temperature is about 30° C.11. The method of claim 4 , wherein the incubating is at a temperature is about 30° C.12. The method of claim 5 , wherein the incubating is at a temperature is about 30° C.13. The method of claim 6 , wherein the incubating is at a temperature is about 30° C.14. The method of claim 7 , wherein the incubating is at a temperature is about 30° C.15. The method of claim 8 , wherein the incubating is at a temperature is about 30° C.16. The method of claim 10 , wherein the incubating is at a temperature is about 35° C.17. The method of claim 11 , wherein the incubating is at a temperature is about 35° C.18. The method of claim 12 , wherein the incubating is at a ...

Подробнее