塞斯特林2/Keap1/Nrf2通路调节了与交通相关的PM2.5和水溶性提取物诱导的肺表皮中的粘液过分分泌
Jiayu Tian1, Xin Wang2, Hao Shi1
1Department of Environmental Health, School of Public Health, Shanxi Medical University, 56 Xinjian South Road, 030001 Taiyuan, Shanxi, China; Center for Ecological Public Health Security of Yellow River Basin, Shanxi Medical University, 56 Xinjian South Road, 030001 Taiyuan, Shanxi, China; Key Laboratory of Coal Environmental Pathogenicity and Prevention (Shanxi Medical University), Ministry of Education, China.
与交通相关的细颗粒物 (PM2.5) 和其提取物通过增加粘液,使喘恶化. 这通过Sestrin2/Keap1/Nrf2通路发生,导致氧化应激和粘液产生.
科学领域:
- 环境健康 环境健康
- 毒理学 毒理学 毒理学
- 肺部病理学 肺部病理学
背景情况:
- 喘的特点是粘液过分分泌,这种情况因微粒物质 (PM2.5) 暴露而加剧.
- 交通相关的PM2.5 (TRPM2.5) 是一个与呼吸系统疾病有关的重要环境污染物.
研究的目的:
- 在喘模型中研究TRPM2.5及其水溶性提取物 (WSE) 对粘液高分泌的毒性机制.
- 阐明Sestrin2/Keap1/Nrf2信号通路在TRPM2.5诱导的气道粘液产生中的作用.
主要方法:
- 在老鼠和16HBE细胞中,卵胺诱导的喘模型暴露于TRPM2.5和WSE.
- 分析了粘液分泌,杯状细胞增生,MUC5AC表达,氧化应激标志物 (氨酸,髓氧化酶) 和Sestrin2/Keap1/Nrf2通路.
- 进行了Sestrin2敲击,以评估其在观察到的影响中的作用.
主要成果:
- 暴露于TRPM2.5和WSE导致大鼠肺部的粘液污点和杯状细胞增加.
- 在老鼠肺和16HBE细胞中观察到MUC5AC基因和蛋白质表达的升高.
- TRPM2.5和WSE诱导了氧化损伤,并激活了Sestrin2/Keap1/Nrf2通路,这被Sestrin2敲击逆转了.
结论:
- TRPM2.5和WSE在喘中促进粘液的过分分泌.
- 塞斯特林2/凯普1/Nrf2通路是TRPM2.5诱导的粘液产生和呼吸道中氧化应激的关键调解者.
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