基于METTL3-VISTA轴的组合免疫疗法用于APC截断结直肠癌
Ling Wu1,2, Rui Bai2, Yujie Zhang2
1Department of Pathology, Shunde Hospital of Southern Medical University, Foshan, Guangdong, China.
Journal for immunotherapy of cancer
|December 9, 2024
概括
截断的细菌腺瘤多样性肠杆菌 (APC) 蛋白质通过促进免疫抑制瘤微环境来驱动结直肠癌 (CRC) 的进展. 针对APC-METTL3-HIF1α轴提供了一种改善CRC免疫治疗的新策略.
科学领域:
- 在瘤学瘤学.
- 免疫学 免疫学 免疫学
- 癌症生物学 癌症生物学
背景情况:
- 免疫检查点阻塞 (ICB) 疗法在结直肠癌 (CRC) 中显示出有限的益处.
- 细菌腺瘤多杆菌 (APC) 突变是CRC的早期事件,但截断的APC在CRC免疫微环境中的作用尚不清楚.
研究的目的:
- 调查截断APC在调解CRC免疫抑制中的作用.
- 探索切断APC在CRC免疫微环境中的临床意义.
- 为了确定CRC免疫治疗的新治疗点.
主要方法:
- 使用APCMin/+小鼠模型和腺癌诱导.
- 采用多重免疫组织化学和流动细胞测量来分析免疫细胞和VISTA表达.
- 使用小鼠模型和分子分析研究了METTL3-HIF1α轴及其对抗瘤免疫力的影响.
- 在人性化小鼠模型中评估VISTA向药物的疗效.
主要成果:
- 截断APC (APC978∆) 过度表达METTL3导致通过m6A甲基化增加HIF1α表达.
- HIF1α促进了骨髓原抑制细胞迁移,并增强了CRC细胞上的VISTA表达,削弱了免疫监测.
- 在APC978∆-HIF1α轴有助于免疫抑制瘤微环境.
结论:
- 截断APC驱动一个免疫抑制程序,增强CRC的进展.
- 准APC-METTL3-HIF1α轴为CRC提供了一个新的治疗策略.
- 这项研究为改善ICB抗性CRC患者的免疫治疗提供了新的视角.
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