细颗粒物通过通过METTL3/YTHDF2-依赖的m6A甲基化激活STC2介导的线粒细胞吸收来加剧喘
Yao Liu1, Guoping Li1, Anying Xiong1
1Laboratory of Allergy and Precision Medicine, Chengdu Institute of Respiratory Health, Affiliated Hospital of Southwest Jiaotong University, The Third People's Hospital of Chengdu, Chengdu 610031, China; Department of Respiration, Chengdu Third People's Hospital Branch of National Clinical Research Center for Respiratory Disease, Affiliated Hospital of ChongQing Medical University, Chengdu 610031, China.
细颗粒物 (PM2.5) 通过增加N6-甲基氨酸 (m6A) 甲基化来加剧喘,从而激活线粒细胞衰变. 针对这些途径为与污染相关的呼吸道健康问题提供了新的喘治疗策略.
科学领域:
- 环境健康 环境健康
- 分子生物学分子生物学
- 免疫学 免疫学 免疫学
背景情况:
- 暴露于细颗粒物 (PM2.5) 是呼吸系统疾病的重要环境风险因素.
- 喘恶化是与空气污染相关的严重健康问题.
- 在PM2.5引起的喘恶化背后的分子机制需要进一步阐明.
研究的目的:
- 调查PM2.5加剧喘的分子机制.
- 探索N6-甲基氨酸 (m6A) 甲基化,菌,STC2和SQSTM1在PM2.5诱导的喘中的作用.
- 为了将分子发现与喘患者的临床观察相关联.
主要方法:
- 单细胞RNA测序 (scRNA-seq) 用于分析暴露于PM2.5.5的喘小鼠的细胞变化.
- 进行了分子试验,以评估m6A甲基化,基因表达 (STC2),蛋白质水平 (SQSTM1) 和线粒细胞吸收.
- 从喘患者的外周血液样本中分析了METTL3和STC2血清度的季节性变化.
主要成果:
- 在喘小鼠中,暴露于PM2.5改变了免疫细胞分布,并减少了上皮细胞数量.
- PM2.5增加了STC2mRNA的m6A甲基化,导致STC2上调和通过METTL3和YTHDF2激活线粒细胞.
- 通过增加SQSTM1,STC2通过增加SQSTM1增强了线粒,从而加剧了喘的严重程度.
- 与夏季相比,喘患者在冬季 (高PM2.5) 的血清METTL3和STC2水平较高.
结论:
- 暴露于PM2.5会通过一种m6A依赖的途径加剧喘,其中包括METTL3,STC2和线粒细胞衰变.
- 在PM2.5诱导的线粒体自和喘严重程度中,STC2起着关键作用.
- 冬季METTL3和STC2水平升高与增加的PM2.5暴露和喘风险相关.
- 针对m6A甲基化和线粒细胞吸收,为污染加重的喘提供了潜在的治疗策略.
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