CTLA4分子通常表达于CD4+和CD8+ T细胞表面,能够与抗原递呈细胞(Antigen presenting cells, APCs)上的B7配体高亲和力结合,产生抑制T细胞活化的信号,减少细胞因子产生,降低机体抗肿瘤免疫反应。 使用CTLA4分子抑制剂或CTLA4单克隆抗体可以解除CTLA4对T细胞的抑制作用,...
(T细胞的活化)1987年,法国免疫学家Pierre Golstein(皮埃尔-戈尔斯坦)实验室在自然杂志上发文,他们在寻找CD8+杀伤型T细胞的“分子武器”时,从活化的CD8+T细胞中分离出一个cDNA,并称之为细胞毒性T淋巴细胞相关蛋白4(CTLA-4,Cytotoxic T lymphocyte-associated...
通过对患者样本进行单细胞转录组分析,揭示了抗 PD-L1 加抗 CTLA4联合疗法增强了CD4+和CD8+ T细胞的扩张,特别是CD4+ T细胞的明显激活。该研究聚焦于抗PD-L1和抗CTLA4联合治疗头颈部鳞状细胞癌的影响,特别强调了CD4+ T细胞激活的作用。通过对患者样本进行单细胞转录组分析,揭示了联合疗法增强了CD4+和CD8+ T细胞的...
最常见的两种检查点抑制策略是CTLA4抑制和PD-1/PD-L1阻断。CTLA4发现于1987年,在20世纪90年代中期被认为是参与T细胞活化的负性调节蛋白,调节T细胞活化的程度。 CTLA4是一种共抑制分子,当CTLA4存在于CD4+和CD8+T淋巴细胞表面时可发挥作用,与抗原呈递细胞(Antigen-presenting cell,APC)上的配体CD80和CD86(B7-1和B7-...
从而抑制CD8+ T cell的免疫活性;另一方面,在调节型T细胞(T-reg)中,CTLA-4能提高T-reg cell对...
CD8+ T cellsImmune checkpointsBackground Cytotoxic T-lymphocyte associated protein 4 (CTLA4) inhibitors have been shown to significantly prolong the overall survival (OS) in a wide range of cancers. However, its application in clear cell renal cell carcinoma (ccRCC) is limited due to the ...
Initiation of T-cell activation is mediated by phosphorylation of the ITAMs (Immunoreceptor Tyrosine-based Activation Motifs) on the TCR-CD3 complex by Lck (attached to CD4 or CD8), and Fyn, both of which are members of the Src family of kinases...
虽然它们都会使CD8+ T细胞增加,但其实是各自通过不同的细胞机制来实现的:anti-PD-1主要是通过触发线粒体氧化磷酸化途径,而anti-CTLA-4则能触发胞内大多数信号途径,其中还包括细胞周期调控途径。 Anti-CTLA-4 and anti-PD-1 checkpoint- blockade therapies target distinct tumor- infiltrating T cell populations ...
CD152 and PD-1 down-regulation on CD8 T cells is associated with human acute liver allograft rejection. PMID: 25498082 CTLA4 gene variants in autoimmunity and cancer: a comparative review. PMID: 21931200 CTLA4 DNA methylation is associated with CTLA-4 expression and predicts response to immunothera...
虽然它们都会使CD8+ T细胞增加,但其实是各自通过不同的细胞机制来实现的:anti-PD-1主要是通过触发线粒体氧化磷酸化途径,而anti-CTLA-4则能触发胞内大多数信号途径,其中还包括细胞周期调控途径。 Anti-CTLA-4 and anti-PD-1 checkpoint- blockade therapies target distinct tumor- infiltrating T cell populations ...