CD318表达定义了一种人类CD8+调节性T细胞的新型子集
Jeong-Su Do1,2, Wei-Kai Chen1,2,3, Yu-Wen Hung1,2
1Department of Immunology and Theranostics, City of Hope, Duarte, CA, USA.
Science advances
|January 23, 2026
概括
含有CUB域的蛋白1 (CDCP1;CD318) 标记了具有抑制功能的CD8+T细胞的一个子集. 这些细胞参与免疫调节,在1型糖尿病中表达减少.
科学领域:
- 免疫学 免疫学 免疫学
- 细胞生物学 细胞生物学
- 分子医学是分子医学.
背景情况:
- 含CUB域蛋白1 (CDCP1;CD318) 是一种表面糖蛋白,主要用于瘤免疫学.
- 已知CD318与预后不佳有关,并且在髓状树突细胞和单细胞中具有免疫调节作用.
研究的目的:
- 研究CD318在人类T细胞上的表达和功能.
- 确定CD318在T细胞激活,免疫调节和1型糖尿病 (T1D) 中的作用.
主要方法:
- 流细胞计,以评估人类CD4+和CD8+T细胞上的CD318表达.
- 测量细胞因子生产 (IFN-γ,TNF-α) 和T细胞抑制的功能性测试.
- 分析T1D患者样本以评估CD318诱导.
主要成果:
- CD318在被激活的人类CD8+T细胞的子集上选择性表达,而不是CD4+T细胞.
- CD318+ CD8+ T细胞表现出降低的PD-1和KLRG-1,减少的细胞因子产生,以及强大的抑制活性.
- 与对照组相比,来自T1D患者的CD8+ T细胞显示CD318诱导减少.
- CD318抑制T细胞受体信号传递,其诱导需要依赖IL-2的mTOR激活.
结论:
- CD318 作为人类 CD8+ T 细胞子集的标记物,具有抑制功能.
- CD318表达与免疫调节有关,可能在自身免疫性中发挥作用,特别是在T1D中.
- 了解CD318的机制,可以了解T细胞信号传导和潜在的治疗点.
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