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    • 5. 发明申请
    • ANTAGONISTS OF IL-21 AND MODULATION OF IL-21-MEDIATED T CELL RESPONSES
    • IL-21的拮抗剂和IL-21介导的T细胞应答的调节
    • WO2003087320A2
    • 2003-10-23
    • PCT/US2003/010736
    • 2003-04-08
    • BETH ISRAEL DEACONESS MEDICAL CENTER, INC.MOLL, ThomasSTROM, Terry, B.ZHENG, Xin, Xiao
    • MOLL, ThomasSTROM, Terry, B.ZHENG, Xin, Xiao
    • C12N
    • C07K14/54A61K38/00A61K48/00A61K2039/505C07K14/5443C07K14/55C07K14/7155C07K2319/00
    • The present invention is based, in part, on the creation of molecules that antagonize the receptor for interleukin-21 (IL-21). The antagonist can be, for example, a mutant of IL-21 (mIL-21). Moreover, the mIL-21 polypeptide can be joined to ( e.g ., joined by way of a peptide bond to) a heterologous polypeptide ( i.e ., a non-IL-21 polypeptide), such as an Fc region of an immunoglobulin molecule ("mIL-21/Fc"). Such antagonists have been shown to inhibit cellular proliferation in response to either anti-CD3 monoclonal antibodies or anti-CD3 antibodies applied together with IL-2, IL-15, or either cytokine (IL-2 or IL-15) together with IL-21 (these studies and their significance are described further below). Accordingly, the present invention features polypeptides that include a mutant IL-21 sequence, nucleic acids encoding those mutants, compositions containing them, and methods of using them in a variety of diagnostic, prognostic, and treatment regimes.
    • 本发明部分地基于产生拮抗白细胞介素-21(IL-21)受体的分子。 拮抗剂可以是例如IL-21(mIL-21)的突变体。 此外,mIL-21多肽可以连接到(例如,通过肽键连接)异源多肽(即非IL-21多肽),例如免疫球蛋白分子的Fc区(“mIL -21 / FC“)。 已经显示这样的拮抗剂响应于与IL-2,IL-15或细胞因子(IL-2或IL-15)一起应用的抗CD3单克隆抗体或抗CD3抗体与IL- 21(这些研究及其意义在下面进一步描述)。 因此,本发明的特征在于包括突变型IL-21序列的多肽,编码这些突变体的核酸,含有它们的组合物,以及在各种诊断,预后和治疗方案中使用它们的方法。