通过PVT1的过载会重新编程中性粒细胞的命运,并限制胃癌的进展
Dong Wang1, Yunlong Li2, Xiaoyu Peng1
1Scientific Research Centre, the Second Affiliated Hospital of Harbin Medical University, Harbin, 150081, China.
在胃癌 (GC) 中PVT1上调驱动瘤进展,通过信号破坏中性粒细胞功能. 向PVT1为GC免疫疗法提供了一个新的代谢策略.
科学领域:
- 在瘤学瘤学.
- 分子生物学分子生物学
- 免疫学 免疫学 免疫学
背景情况:
- 在胃癌 (GC) 中,PVT1 异常上调,作为关键分子标记物.
- 通过代谢调节,PVT1影响瘤微环境 (TME) 的机制,特别是它对瘤相关中性粒细胞 (TAN) 的影响,尚不清楚.
- 这项研究研究了PVT1在通过信号通路调节TAN命运的新机制.
研究的目的:
- 阐明PVT1在胃癌进展中的作用.
- 研究PVT1通过信号调节瘤相关中性粒细胞 (TAN) 的机制.
- 确定PVT1作为胃癌免疫治疗的潜在代谢标.
主要方法:
- 对90例GC病例的临床分析,以将PVT1表达与中性粒细胞透相关联.
- 多omics集成 (转录组和蛋白组) 识别GC中的PVT1相关途径.
- 在体外和体内功能验证,包括基因沉默和条件介质实验,以评估PVT1的致癌作用和中性粒细胞激活机制.
主要成果:
- 在GC组织中,PVT1表达显著升高,与中性粒细胞透有负相关性.
- 在GC细胞中抑制PVT1可以调节信号基因 (RYR2,RYR3),增加细胞内Ca2+度,并增强synaptopodin (SYNPO) 分泌.
- 抑制PVT1 Knockdown抑制GC细胞的增殖,迁移和入侵,同时促进中性粒细胞的激活,延迟亡,并通过p53通路调节衰老.
结论:
- 通过诱导过载,PVT1在GC中建立了代谢检查点,从而调节中性粒细胞衰老和功能.
- 这项研究揭示了PVT1在通过中性粒细胞的代谢调节来调节TME的关键作用.
- PVT1代表了胃癌免疫治疗的新型代谢干预点.
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