B7-H3通过调节CD8+ T细胞耗尽来促进鼻癌的进展
Zhaoen Ma1,2, Gui Chen3, Hao Li3
1The First Affiliated Hospital of Jinan University, Guangzhou, China.
Immunity, inflammation and disease
|September 13, 2024
概括
B7-H3蛋白通过与4-1BB相互作用,加速鼻癌 (NPC) 的生长和入侵,导致CD8+T细胞耗尽. 抑制B7-H3可能是NPC的新疗法策略.
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:
- B7-H3蛋白是人类癌症适应性免疫反应的关键调节者.
- 4-1BB是CD8+T细胞上的共刺激受体,调节T细胞免疫力.
- 鼻癌 (NPC) 是一种具有复杂免疫相互作用的显著人体瘤.
研究的目的:
- 调查B7-H3在NPC生长和入侵中的作用.
- 在瘤免疫的背景下探索B7-H3和4-1BB之间的相互作用.
- 评估B7-H3作为NPC的潜在治疗点.
主要方法:
- 短发针RNA (shRNA) 用于在NPC细胞中降低B7-H3表达.
- 细胞增殖,细胞亡,迁移,入侵和上皮细胞转移到介质细胞 (EMT) 在体外和体内都进行了评估.
- 进行了共免疫沉 (Co-IP) 试验,以确认B7-H3和4-1BB相互作用.
- 反-4-1BB抗体对NPC发育的影响在共同培养和异种移植模型中进行了研究.
主要成果:
- 击败B7-H3减少了NPC细胞的增殖,迁移,入侵和EMT,同时增加了细胞亡.
- 带有B7-H3淘汰的NPC异种移植体表现出较低的瘤负担,减少的增殖,增加的亡,以及较少的EMT.
- 减少B7-H3表达与增加的干扰素-γ,瘤缩因子-α和4-1BB+CD8+瘤透淋巴细胞相关.
- 发现B7-H3与4-1BB相互作用,而抗-4-1BB抗体可以逆转B7-H3对NPC免疫力的抑制作用.
结论:
- B7-H3促进NPC生长,入侵和EMT,可能通过与4-1BB相互作用,导致CD8+T细胞耗尽和抑制抗瘤免疫力.
- B7-H3代表了对鼻癌的有前途的新型治疗标.
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