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B7-H3通过重编程糖溶性代谢来抑制CD8+ T细胞免疫功能
Yulu Wu1, Wenzhe Han1, Xiufa Tang1
1State Key Laboratory of Oral Diseases & National Center for Stomatology & National Clinical Research Center for Oral Diseases, West China Hospital of Stomatology, Sichuan University, Chengdu 610041, Sichuan, China; Department of Oral and Maxillofacial Surgery, West China Hospital of Stomatology, Sichuan University, Chengdu 610041, Sichuan, China.
B7-H3 (CD276) 通过增强瘤细胞糖解和抑制口腔状细胞癌中CD8+ T细胞功能来促进癌症生长. 针对这种代谢重编程提供了一个潜在的治疗策略.
科学领域:
- 免疫学 免疫学 免疫学
- 代谢重编程 代谢重编程
- 癌症生物学 癌症生物学
背景情况:
- 恶性瘤是一个重大的健康问题.
- B7同源3 (B7-H3或CD276) 在瘤中广泛表达,并影响葡萄糖代谢.
- B7-H3介导的代谢变化与抗瘤免疫反应之间的相互作用尚未得到充分理解.
研究的目的:
- 研究B7-H3表达与口腔状细胞癌 (OSCC) 的临床病理特征之间的关联.
- 阐明B7-H3在OSCC细胞和CD8+T细胞之间的葡萄糖代谢竞争中的作用.
- 探索B7-H3对CD8+T细胞功能的影响以及潜在的分子机制.
主要方法:
- 对B7-H3表达与OSCC临床病理参数的相关性分析.
- 共培养实验涉及OSCC细胞和流细胞计分类CD8+T细胞.
- 测量葡萄糖的摄取,乳酸分泌和干扰素- (IFN-γ) 的释放.
- 评估CD8+T细胞免疫和疲劳状态.
- 对氨基酸3-激酶 (PI3K) /Akt/mTOR信号通路的研究.
主要成果:
- B7-H3表达与晚期OSCC阶段,淋巴结转移和瘤位置相关.
- B7-H3 增强OSCC和黑色素瘤细胞的糖解,同时抑制CD8+ T细胞糖解.
- 抑制B7-H3会增加CD8+T细胞IFN-γ的分泌,并改善它们的抗瘤功能.
- 外源性葡萄糖补充可以逆转B7-H3对T细胞糖解的抑制作用.
- B7-H3对免疫细胞的代谢调节可能通过PI3K/Akt/mTOR途径进行调节.
结论:
- B7-H3在瘤微环境中的代谢重编程中起着关键作用,促进瘤性.
- 针对B7-H3驱动的代谢变化是增强抗瘤免疫力的有希望的策略.
- 了解B7-H3对葡萄糖代谢的影响是开发新型癌症免疫疗法的关键.
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