在慢性阻塞性肺病中,PM2.5通过GSK-3β/NRF2通路诱导铁
Dong Ye1, Jie Ou1, Dongshuang Zhu2
1State Key Laboratory of Respiratory Disease, Guangzhou Chest Hospital, Guangzhou, China.
Experimental lung research
|September 1, 2025
概括
通过GSK-3β/NRF2通道,暴露于细颗粒物 (PM2.5) 会触发气道细胞中的铁,从而导致慢性阻塞性肺病 (COPD) 的发展. 抑制铁化为PM2.5诱导的慢性肺炎提供了潜在的治疗策略.
科学领域:
- 环境健康
- 细胞生物学
- 肺病学
背景情况:
- 细颗粒物 (PM2.5) 是慢性阻塞性肺病 (COPD) 的重要危险因素.
- 暴露于PM2.5与呼吸道上皮细胞中的铁和氧化应激有关.
- 之前的研究表明,PM2.5降低了化糖原合成激酶 (GSK) - 3β,GSK - 3β/核因子红色素2相关因子 (NRF2) 途径的过度活性与铁死相关.
研究的目的:
- 通过GSK-3β/NRF2通路,研究PM2.5是否会诱导气道上皮细胞的铁.
- 确定这种途径在PM2.5诱导的COPD发展中的作用.
主要方法:
- 使用PM2.5诱导的COPD和呼吸道上皮细胞的实验室小鼠模型.
- 评估基因和蛋白质表达 (qRT-PCR,西式涂抹,免疫光,免疫组织化学).
- 测量了脂质过氧化,肺功能和肺组织损伤;测试了铁和GSK-3β抑制剂.
主要成果:
- 暴露在PM2.5下降了NRF2,SLC7A11,GPX4mRNA和p-GSK-3β,NRF2,SLC7A11,FTH-1蛋白水平,同时增加了NCOA4和脂质过氧化.
- 在小鼠肺部中,PM2.5降低了p-GSK-3β,NRF2,SLC7A11和GPX4的表达,导致肺部损伤和功能受损.
- 铁酶抑制剂 (FER-1) 和GSK-3β抑制剂 (TDZD-8) 逆转了PM2. 5诱导的影响.
结论:
- 通过GSK-3β/NRF2信号通路诱导呼吸道上皮细胞铁.
- 这种铁死有助于呼吸道氧化应激和COPD的发病.
- 这种GSK-3β/ NRF2通路是PM2.5诱导的COPD的潜在治疗点.
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