急性PM2.5暴露对PTGS2和RNA m6A修饰的影响
Zhigang Li1, Qiaoqiao Su1, Rongrong Xu2
1State Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environmental Sciences, Beijing, China.
Environmental pollution (Barking, Essex : 1987)
|July 27, 2023
概括
颗粒物2.5 (PM2.5) 暴露会增加人体血液中的RNA甲基化和PTGS2水平,这表明PM2.5通过表观遗传变化促进炎症. 这一发现为PM2.5对健康的影响提供了新的见解.
科学领域:
- 环境健康 环境健康
- 表观遗传学 在表观遗传学中,表观遗传学是指表观遗传学.
- 分子生物学分子生物学
背景情况:
- 颗粒物2.5 (PM2.5) 是一个重要的健康风险,但其分子机制尚未完全理解.
- RNA m6A甲基化是关键的表观遗传调节剂,其在人类PM2.5诱导影响中的作用尚未被探索.
- 之前的动物研究表明,PM2.5上调肺部m6ARNA甲基化.
研究的目的:
- 调查环境PM2.5暴露与人类外周血液中的RNA m6A修饰概况之间的关联.
- 检查PM2.5对全球m6ARNA甲基化和PTGS2水平的影响.
- 探索PTGS2作为PM2.5诱导炎症的调节因子的潜在作用.
主要方法:
- 一个面板研究,涉及65名学生与3次后续访问 (2021年8月-2022年1月).
- 在外周血液单核细胞 (PBMC) 中分析m6ARNA修饰概况.
- 应用线性混合效应 (LME) 模型来评估PM2.5暴露与分子标记物之间的关联.
主要成果:
- 较高的PM2.5暴露水平显著与全球m6ARNA甲基化增加有关.
- 周围血液中升高的PTGS2水平与增加的PM2.5暴露相关.
- 在高 PM2.5 暴露后,PTGS2 mRNA 过度甲基化,其表达增加.
结论:
- 暴露于PM2.5会促进人体外围血液中的RNA m6A修饰.
- 在对PM2.5暴露的反应中,PTGS2可能会作为一种新的炎症调节剂.
- RNA m6A 修改可能会调解 PTGS2 的改变表达,从而导致 PM2.5 诱导的不良健康影响.
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