24-01-2019 дата публикации
Номер: US20190021295A1
Принадлежит:
A genetically modified mouse is provided, wherein the mouse expresses an immunoglobulin light chain repertoire characterized by a limited number of light chain variable domains. Mice are provided that express just one or a few immunoglobulin light chain variable domains from a limited repertoire in their germline. Methods for making bispecific antibodies having universal light chains using mice as described herein, including human light chain variable regions, are provided. Methods for making human variable regions suitable for use in multispecific binding proteins, e.g., bispecific antibodies, and host cells are provided. Bispecific antibodies capable of binding first and second antigens are provided, wherein the first and second antigens are separate epitopes of a single protein or separate epitopes on two different proteins are provided. 1. A mouse that expresses a single rearranged human immunoglobulin light chain variable (V) region derived from a rearranged germline variable region sequence that comprises a human Vgene segment derived from a human Vκ3-20 gene segment and{'sub': H', 'L', 'H', 'H', 'H', 'H', 'H', 'H', 'H', 'H', 'H', 'H', 'H', 'H', 'H', 'H', 'H', 'H', 'H', 'H', 'H', 'H', 'H', 'H', 'H', 'H', 'H', 'H', 'H', 'H', 'H', 'H', 'H', 'H', 'H', 'H', 'H', 'H', 'H', 'H', 'H, 'a human immunoglobulin heavy chain variable (V) region cognate with said Vregion wherein the Vregion comprises a human Vsegment derived from a segment selected from V6-1, V1-2, V1-3, V2-5, V3-7, V1-8, V3-9, V3-11, V3-13, V3-15, V1-18, V3-20, V3-21, V3-23, V1-24, V2-26, V4-28, V3-30, V4-31, V3-33, V4-34, V4-39, V3-43, V1-46, V3-48, V3-49, V5-51, V3-53, V1-58, V4-59, V4-61, V3-64, V3-66, V1-69, V2-70, V3-72, and V3-73.'}2. The mouse of claim 1 , wherein the Vregion comprises a human Vsegment derived from a segment selected from V1-2 claim 1 , V1-3 claim 1 , V2-5 claim 1 , V3-7 claim 1 , V1-8 claim 1 , V3-9 claim 1 , V3-13 claim 1 , V3-15 claim 1 , V3-20 claim 1 , V3-21 claim 1 , V3-23 ...
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