23-01-2020 дата публикации
Номер: US20200024319A1
Автор:
AGRAWAL Neeraj Jagdish,
ALCORN Dina N.,
BERRY Kelly Ann,
BUTZ Eric Alan,
DE IMUS Cyr Clovis Chua,
Foltz Ian Nevin,
GAVIN Marc Alain,
Kannan Gunasekaran,
KETCHUM Randal Robert,
Li Li,
LIM Ai Ching,
MANCHULENKO Kathy,
SEKIROV LAURA,
THOMSON Christy Ann,
XIA Dong
Provided herein are IL-2 muteins, IL-2 mutein Fc-fusion molecules, anti-IL-2 antibodies, and complexes comprising an anti IL-2 antibody bound to an IL-2 cytokine that preferentially expand and activate T regulatory cells and are amenable to large scale production. Also provided herein are variant human IgG1 Fc molecules lacking or with highly reduced effector function and high stability despite lacking glycosylation at N297. Also provided herein are linker peptides that are glycosylated when expressed in mammalian cells. Also provided herein are methods of making and using the compositions of the present invention. 1. A human interleukin-2 (IL-2) mutein comprising an amino acid sequence that is at least 90% identical to the amino acid sequence set forth in SEQ ID NO:1 , wherein said IL-2 mutein has at least one mutation selected from L12G , L12K , L12Q , L12S , Q13G , E15A , E15G , E15S , H16A , H16D , H16G , H16K , H16M , H16N , H16R , H16S , H16T , H16V , H16Y , L9A , L19D , L19E , L19G , L9N , L19R , L19S , L19T , L19V , D20A , D20E , D20F , D20G , D20T , D20W , M23R , R81A , R81G , R81S , R81T , D84A , D84E , D84G , D84I , D84M , D84Q , D84R , D84S , D84T , S87R , N88A , N88D , N88E , N88F , N88G , N88M , N88R , N88S , N88V , N88W , V91D , V91E , V91G , V91S , I92K , I92R , and E95G and preferentially stimulates T regulatory cells relative to other T cells or NK cells , both in in vitro assays and in humanized mice (NSG mice reconstituted with CD34+ hematopoietic stem cells).2. (canceled)3. (canceled)4. The human IL-2 mutein of further comprising a mutation at C125A.5. (canceled)6. An Fc-fusion protein comprising an Fc and the human IL-2 mutein of .7. (canceled)8. The Fc-fusion protein of claim 7 , wherein the human IgG1 Fc comprises one or more mutations altering effector function of said Fc.9. The Fc-fusion protein of claim 8 , wherein the human IgG1 comprises a substitution at N297.10. The Fc-fusion protein of claim 9 , wherein the substitution at N297 is ...
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