[PM2.5诱导的M2极化和IL-1α分泌由瘤相关的巨细胞促进肺腺癌的进展]
Bomiao Qing1, Xiaolan Li2, Qin Ran2
1College of Medicine, Southwest Jiaotong University, Chengdu 610031, China.
Zhongguo fei ai za zhi = Chinese journal of lung cancer
|November 27, 2025
概括
细颗粒物 (PM2.5) 暴露促进了肺腺癌 (LUAD) 的生长,通过重编程巨细胞到免疫抑制M2表型. 介乐金-1α (IL-1α) 被确定为一种关键的细胞因子,可以调解这些亲瘤原生效应.
科学领域:
- 环境健康 环境健康
- 癌症生物学 癌症生物学
- 免疫学 免疫学 免疫学
背景情况:
- 肺腺癌 (LUAD) 是癌症死亡的主要原因,受瘤免疫微环境和环境因素的影响.
- 微粒颗粒物 (PM2.5) 暴露与增加LUAD风险和预后不佳有关,但其免疫调节机制尚不清楚.
- 与瘤相关的巨细胞 (TAMs),特别是M2极化的巨细胞,对于瘤的进展和免疫规避至关重要.
研究的目的:
- 调查PM2.5暴露对LUAD中TAMs的影响.
- 为了确定参与PM2.5驱动的LUAD进展的关键亲瘤原始因素.
主要方法:
- 建立了与PM2.5暴露的小鼠正位体LUAD模型.
- 用于体内成像,流细胞计,体内测试 (CCK-8,殖民地形成,伤口愈合),西斑和RT-qPCR.
- 综合转录组测序与生物信息数据库 (TISIDB,GEPIA) 识别和验证关键细胞因子.
主要成果:
- 暴露于PM2.5促进了LUAD瘤的生长,并在体内增加了M2-TAMs.
- 接受PM2.5处理的巨体表现出一种免疫抑制的表型 (PD-L1+/Arg1+),并增强了瘤细胞的增殖,迁移和殖民地形成.
- 鉴定出IL-1α是PM2.5暴露下的巨细胞中关键上调的细胞因子,与M2-TAMs,Tregs相关,LUAD患者的生存率较差.
结论:
- 暴露于PM2.5可以通过诱导免疫抑制性TAM和促进瘤细胞恶性病变来加速LUAD的进展.
- 在PM2.5暴露下由巨细胞分泌的IL-1α作为关键的前瘤原生因素.
- IL-1α代表了PM2.5相关的LUAD的潜在治疗标.
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