VSIG4通过抑制瘤微环境中的瘤特异性CD8+T细胞免疫力来限制肝细胞癌的控制
Jinglong Guo1, Siddheshvar Bhela1, Monica Sharma1
1Genentech United States.
Cancer immunology research
|February 25, 2026
概括
含有4 (VSIG4) 的V-集和免疫球蛋白域是肝细胞癌 (HCC) 的新目标. 抑制VSIG4增强了抗瘤免疫力,并改善了HCC模型中的免疫治疗疗效.
科学领域:
- 免疫学 免疫学 免疫学
- 在瘤学瘤学.
- 细胞生物学 细胞生物学
背景情况:
- 免疫疗法已经改变了肝细胞癌 (HCC) 治疗方法.
- 有限的应答率需要HCC的新型治疗点.
研究的目的:
- 研究VSIG4 (V集和含有4的免疫球蛋白域) 在HCC中的作用.
- 评估VSIG4作为HCC免疫疗法的潜在治疗标.
主要方法:
- 在小鼠和人类HCC组织中评估VSIG4表达.
- 利用本土的HCC模型来研究VSIG4缺乏效应.
- 进行了ex vivo和in vitro研究,以分析VSIG4抑制T细胞的机制.
主要成果:
- 在HCC中高VSIG4表达与患者预后不佳相关.
- 在小鼠中VSIG4缺乏提高了CD8+T细胞活性和瘤控制.
- 发现VSIG4+巨细胞在HCC瘤微环境中抑制CD8+T细胞功能.
- 组合疗法 (抗PD-L1和抗VEGF) 在VSIG4缺陷模型中显示出增强的疗效.
结论:
- 在HCC中,VSIG4主要由瘤相关的巨细胞表达.
- 在HCC中,VSIG4作为抗瘤T细胞反应的直接抑制剂.
- 针对VSIG4是一个有前途的策略,用于增强HCC免疫疗法.
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