生物质燃料相关的PM2.5通过PI3K/AKT/TRPC1路径促进肺纤维细胞-肌纤维细胞过渡
Shuni Li1, Lihui Qu1, Lifen Zhou1
1State Key Laboratory of Respiratory disease, Department of Physiology, School of Basic Medical Sciences, Guangzhou Medical University, Guangzhou, Guangdong, RP China.
Ecotoxicology and environmental safety
|April 10, 2024
概括
生物质燃料相关的细颗粒物 (BRPM2.5) 暴露会导致气道炎症和重塑,导致慢性阻塞性肺病 (COPD). PI3K/AKT/TRPC1通路调解了这一过程,为纤维化提供了潜在的治疗点.
科学领域:
- 环境健康 环境健康
- 肺部病理学 肺部病理学
- 细胞生物学 细胞生物学
背景情况:
- 颗粒物 (PM2.5) 暴露与慢性阻塞性肺病 (COPD) 有关.
- 在COPD病理学中,PM2.5的机制尚未完全理解.
- 生物质燃料相关的PM2.5 (BRPM2.5) 对COPD中纤维细胞到肌纤维细胞过渡 (FMT) 的影响需要调查.
研究的目的:
- 调查BRPM2.5在COPD相关的FMT中的作用和监管效应.
- 阐明BRPM2.5诱导的FMT背后的分子机制.
主要方法:
- 使用暴露于生物燃料烟雾中的老鼠进行体内研究.
- 在体外研究中,使用BRPM2.5进行纤维细胞刺激.
- 对细胞形态,原沉积,细胞收缩性,TRPC1表达,细胞内 ([Ca2+]i) 和PI3K/AKT通路的分析.
主要成果:
- 在老鼠中,长期的BRPM2.5暴露诱导了气道炎症和重塑.
- BRPM2.5刺激了纤维细胞到肌纤维细胞的过渡 (FMT),在体外增加了原合成和细胞收缩性.
- TRPC1和细胞内 ([Ca2+]i) 被BRPM2.5上调;TRPC1敲击抑制了FMT和收缩性.
- PI3K/AKT通路参与了BRPM2.5诱导的FMT和TRPC1表达.
结论:
- BRPM2.5诱导FMT,这是一个涉及COPD病变的过程.
- PI3K/AKT/TRPC1信号通路在BRPM2.5介导的FMT中起着至关重要的作用.
- 针对PI3K/AKT/TRPC1通路可能为BRPM2.5相关的纤维性肺部疾病 (如COPD) 提供治疗策略.
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