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    • 4. 发明授权
    • Tumor cells modified to express B7-2 with increased immunogenicity and uses therefor
    • 肿瘤细胞修饰以表达B7-2,增加免疫原性,并用于此
    • US06723705B1
    • 2004-04-20
    • US09206132
    • 1998-12-07
    • Gordon J. FreemanLee M. NadlerGary S. Gray
    • Gordon J. FreemanLee M. NadlerGary S. Gray
    • A61K3170
    • A01K67/0271A01K2217/05A01K2217/075A01K2267/0331A61K38/00C07K14/70532C07K16/2827C07K2319/00C07K2319/30C12N15/8509
    • Tumor cells modified to express one or more T cell costimulatory molecules are disclosed. Preferred costimulatory molecules are B7-2 and B7-3. The tumor cells of the invention can be modified by transfection with nucleic acid encoding B7-2 and/or B7-3, by using an agent which induces or increases expression of B7-2 and/or B7-3 on the tumor cell or by coupling B7-2 and/or B7-3 to the tumor cell. Tumor cells modified to express B7-2 and/or B7-3 can be further modified to express B7. Tumor cells further modified to express MHC class I and/or class II molecules or in which expression of an MHC associated protein, the invariant chain, is inhibited are also disclosed. The modified tumor cells of the invention can be used in methods for treating a patient with a tumor, preventing or inhibiting metastatic spread of a tumor or preventing or inhibiting recurrence of a tumor. A method for specifically inducing a CD4+ T cell response against a tumor and a method for treating a tumor by modification of tumor cells in vivo are disclosed.
    • 公开了修饰以表达一种或多种T细胞共刺激分子的肿瘤细胞。 优选的共刺激分子是B7-2和B7-3。 本发明的肿瘤细胞可以通过用编码B7-2和/或B7-3的核酸转染,通过使用诱导或增加肿瘤细胞上B7-2和/或B7-3表达的试剂或通过 将B7-2和/或B7-3偶联到肿瘤细胞。 修饰以表达B7-2和/或B7-3的肿瘤细胞可进一步修饰以表达B7。 还公开了进一步修饰以表达MHC I类和/或II类分子或其中抑制MHC相关蛋白(不变链)的表达的肿瘤细胞。 本发明的修饰的肿瘤细胞可用于治疗患有肿瘤的患者,预防或抑制肿瘤的转移性扩散或预防或抑制肿瘤复发的方法。 公开了特异性诱导针对肿瘤的CD4 + T细胞应答的方法和通过体内修饰肿瘤细胞治疗肿瘤的方法。
    • 6. 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。