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首页> 外文期刊>Cancer Cell >Selective Fc gamma R Co-engagement on APCs Modulates the Activity of Therapeutic Antibodies Targeting T Cell Antigens
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Selective Fc gamma R Co-engagement on APCs Modulates the Activity of Therapeutic Antibodies Targeting T Cell Antigens

机译:APC上的选择性Fcγr共啮合调节靶向T细胞抗原的治疗性抗体的活性

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摘要

The co-engagement of fragment crystallizable (Fc) gamma receptors (Fc gamma Rs) with the Fc region of recombinant immunoglobulin monoclonal antibodies (mAbs) and its contribution to therapeutic activity has been extensively studied. For example, Fc-Fc gamma R interactions have been shown to be important for mAb-directed effector cell activities, as well as mAb-dependent forward signaling into target cells via receptor clustering. Here we identify a function of mAbs targeting T cell-expressed antigens that involves Fc gamma R co-engagement on antigen-presenting cells (APCs). In the case of mAbs targeting CTLA-4 and TIGIT, the interaction with FcgR on APCs enhanced antigen-specific T cell responses and tumoricidal activity. This mechanism extended to an anti-CD45RB mAb, which led to Fc gamma R-dependent regulatory T cell expansion in mice.
机译:片段可结晶(Fc)γ受体(FcγRs)与重组免疫球蛋白单克隆抗体(MAB)的Fc区的共同作用及其对治疗活性的贡献已被广泛研究。例如,Fc-γR相互作用已被证明对单克隆抗体导向的效应细胞活动以及通过受体聚集进入靶细胞的单克隆抗体依赖性前向信号非常重要。在这里,我们确定了针对T细胞表达抗原的单克隆抗体的功能,该功能涉及抗原呈递细胞(APC)上的FcγR共结合。在针对CTLA-4和TIGIT的单克隆抗体的情况下,与FcgR在APC上的相互作用增强了抗原特异性T细胞反应和杀瘤活性。这种机制延伸到抗CD45RB单抗,导致小鼠体内FcγR依赖性调节性T细胞扩增。

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