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    • 8. 发明授权
    • Methods of inhibiting T cell proliferation or IL-2 accumulation with CTLA-4 specific antibodies
    • 用CTLA-4特异性抗体抑制T细胞增殖或IL-2积累的方法
    • US07592007B2
    • 2009-09-22
    • US10732847
    • 2003-12-09
    • John G. GribbenGordon J. FreemanLee M. NadlerPaul RennertCindy L. JellisEdward GreenfieldGary S. Gray
    • John G. GribbenGordon J. FreemanLee M. NadlerPaul RennertCindy L. JellisEdward GreenfieldGary S. Gray
    • A61K39/395C07K16/28
    • C07K14/70521A61K38/00C07K14/70532C07K16/2818C07K2317/34
    • Isolated ligands which bind a molecule expressed on the surface of T cells and induce antigen specific apoptosis in activated T cells are disclosed. Preferably, the T cell surface molecule is CTLA4 and the ligand is a monoclonal anti-CTLA4 antibody that binds to an epitope of CTLA4 distinct from the binding sites of B7-1 and B7-2. Upon binding of the antibody to CTLA4 on an activated T cell, in the presence of an antigenic signal, antigen specific apoptosis is induced. The invention also describes a novel natural CTLA4 ligand, distinct from B7-1 and B7-2, which mediates induction of apoptosis. Pharmaceutical compositions of anti-CTLA4 antibodies or other isolated CTLA4 ligands which can be administered to subjects to induce T cell apoptosis, thereby clonally deleting antigen specific T cells, such as alloreactive T cells in transplantation situations or autoreactive T cells in autoimmune disorders, are also disclosed. Methods for inducing T cell apoptosis in vitro with an anti-CTLA4 antibody or other ligand of the invention together with an antigen specific signal are also disclosed, e.g., for use in purging alloreactive T cells from donor bone marrow prior to bone marrow transplantation to inhibit graft versus host disease.
    • 公开了结合在T细胞表面上表达并在活化的T细胞中诱导抗原特异性凋亡的分子的分离的配体。 优选地,T细胞表面分子是CTLA4,并且配体是结合与B7-1和B7-2的结合位点不同的CTLA4的表位的单克隆抗CTLA4抗体。 当抗体与CTLA4在活化的T细胞上结合时,在抗原信号存在下,诱导抗原特异性凋亡。 本发明还描述了一种与介导细胞凋亡诱导的B7-1和B7-2不同的新型天然CTLA4配体。 抗CTLA4抗体或其他分离的CTLA4配体的药物组合物也可以被给予受试者诱导T细胞凋亡,从而克隆地删除抗原特异性T细胞,例如移植情况下的同种异体反应性T细胞或自身免疫性疾病中的自身反应性T细胞, 披露 还公开了用本发明的抗CTLA4抗体或其他配体与抗原特异性信号一起体外诱导T细胞凋亡的方法,例如用于在骨髓移植之前从供体骨髓中清除同种异体反应性T细胞以抑制 移植物抗宿主病。