在PM2.5暴露后,TGF-β调节m6ARNA甲基化
Tingting Wu1, Bingqian Liu1, Yongjie Wei1
1State Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environmental Sciences, Beijing 100012, China.
Toxics
|December 22, 2023
概括
通过改变表观遗传修饰,暴露于颗粒物 (PM2.5$) 会增加肺部疾病的风险. 这项研究揭示了TGF-β通路介导PM$_{2.5}$.
科学领域:
- 环境健康 环境健康
- 分子生物学分子生物学
- 表观遗传学 在表观遗传学中,表观遗传学是指表观遗传学.
背景情况:
- 颗粒物 (PM$_{2.5}$) 暴露与呼吸系统疾病和表观遗传变化有关.
- N6-甲基氨酸 (m$^{6}$A) RNA甲基化是受PM$_{2.5}$影响的关键表观遗传调节器.
- 通过PM$_{2.5}$影响m$^{6}$ARNA甲基化的精确机制尚不清楚.
研究的目的:
- 研究转化生长因子-β (TGF-β) 信号通路在PM$_{2.5}$-诱导的m$^{6}$ARNA甲基化中的作用.
- 阐明将PM$_{2.5}$暴露与肺细胞表观遗传变化的分子机制.
主要方法:
- 利用A549肺细胞系进行PM$_{2.5}$的实验暴露.
- 评估了m$^{6}$ARNA甲基化水平,TGF-β表达和相关的信号分子 (Smad3,METTL3,METTL14).
- 研究了TGF-β通路抑制对PM$_{2.5}$诱导的改变的影响.
主要成果:
- PM$_{2.5}$暴露上调了m$^{6}$ARNA甲基化和TGF-β,Smad3,METTL3和METTL14的表达增加.
- 抑制TGF-β通路逆转了PM$_{2.5}$诱导的m$^{6}$ARNA甲基化和相关蛋白质的变化.
- 这些发现表明TGF-β途径与PM$_{2.5}$的表观遗传效应有关.
结论:
- TGF-β信号通路对于调解PM$_{2.5}$-诱导的m$^{6}$ARNA甲基化至关重要.
- 在TGF-β途径的变化代表了由PM$_{2.5}$暴露引起的肺部疾病的重要机制.
- 准TGF-β通路可能为PM$_{2.5}$相关的呼吸道疾病提供治疗策略.
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