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    • 4. 发明申请
    • ANTIBODIES AND IMMUNOGLOBULIN FUSION PROTEINS HAVING MODIFIED EFFECTOR FUNCTIONS AND USES THEREFOR
    • 具有改良效应功能的抗体和免疫球蛋白融合蛋白及其用途
    • WO1997028267A1
    • 1997-08-07
    • PCT/US1997001698
    • 1997-02-03
    • REPLIGEN CORPORATIONGRAY, Gary, S.CARSON, JerryJAVAHERIAN, KashiJELLIS, Cindy, L.RENNERT, Paul, D.SILVER, Sandra
    • REPLIGEN CORPORATION
    • C12N15/62
    • C07K14/70503A61K38/00A61K2039/5154C07K2319/00
    • CTLA4-immunoglobulin fusion proteins having modified immunoglobulin constant region-mediated effector functions, and nucleic acids encoding the fusion proteins, are described. The CTLA4-immunoglobulin fusion proteins comprise two components: a first peptide having a CTLA4 activity and a second peptide comprising an immunoglobulin constant region which is modified to reduce at least one constant region-mediated biological effector function relative to a CTLA4-IgG1 fusion protein. The nucleic acids of the invention can be integrated into various expression vectors, which in turn can direct the synthesis of the corresponding proteins in a variety of hosts, particularly eukaryotic cells. The CTLA4-immunoglobulin fusion proteins described herein can be administered to a subject to inhibit an interaction between a CTLA4 ligand (e.g., B7-1 and/or B7-2) on an antigen presenting cell and a receptor for the CTLA4 ligand (e.g., CD28 and/or CTLA4) on the surface of T cellsto thereby suppress an immune response in the subject, for example to inhibit transplantation rejection, graft versus host disease or autoimmune responses.
    • 描述了具有修饰的免疫球蛋白恒定区介导的效应子功能的CTLA4-免疫球蛋白融合蛋白,以及编码融合蛋白的核酸。 CTLA4免疫球蛋白融合蛋白包含两个组分:具有CTLA4活性的第一肽和包含免疫球蛋白恒定区的第二个肽,其被修饰以相对于CTLA4-IgG1融合蛋白减少至少一个恒定区介导的生物效应子功能。 本发明的核酸可以整合到各种表达载体中,这又可以指导各种宿主,特别是真核细胞中相应的蛋白质的合成。 本文所述的CTLA4-免疫球蛋白融合蛋白可以施用于受试者以抑制抗原呈递细胞上的CTLA4配体(例如B7-1和/或B7-2)与CTLA4配体的受体(例如, CD28和/或CTLA4),从而抑制受试者的免疫应答,例如抑制移植排斥反应,移植物抗宿主病或自身免疫应答。