摘要
背景:T细胞免疫球蛋白(Ig)结构域和粘蛋白结构域(TIM)蛋白是T细胞上表达的一个受体家族,发挥重要的细胞免疫作用。TIM蛋白跨越跨膜,属于I型跨膜蛋白。N端包含一个类似Ig蛋白的v型结构域和一个富含丝氨酸/苏氨酸的粘蛋白柄作为共抑制受体。C端尾部朝向细胞质,主要介导细胞内信号传导。 方法:本文综述了TIM-3的结构特征和功能,特别是其在介导不同细胞类型的免疫应答中的作用,以及TIM-3靶向癌症免疫治疗的基本原理。 结果:TIM-3作为癌症免疫治疗中潜在的生物标志物具有重要意义。研究表明,在几种临床前肿瘤模型中,检查点抑制剂的阻断可促进抗肿瘤免疫并抑制肿瘤生长。 结论:TIM-3是一种在多种细胞类型上表达的免疫调节分子,包括产生IFNγ的T细胞、FoxP3+Treg细胞和先天免疫细胞。TIM-3在免疫抑制中的作用支持了其作为癌症免疫治疗的靶点的价值。
关键词: T细胞免疫球蛋白,癌症,半乳糖凝集素-9,TIM-3,受体,配体。
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