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微RNA在颗粒物和缺血性中风之间的关联中的作用:一个嵌套的病例控制研究

Tiezheng Li¹, Lisha Xu¹, Peng Shen²

¹Department of Public Health, and Department of Endocrinology of the Children's Hospital, Zhejiang University School of Medicine, National Clinical Research Center for Children's Health, Hangzhou, China.

Environmental pollution (Barking, Essex : 1987)

|January 27, 2025

概括

空气污染,特别是颗粒物 (PM),与缺血性中风 (IS) 风险有关. 这项研究表明,PM可能通过改变血液中的特定微RNA (miRNA) 来触发IS.

科学领域:

环境健康环境健康
分子生物学分子生物学
心血管流行病学心血管流行病学

背景情况:

流行病学研究将大气颗粒物 (PM) 暴露与缺血性中风 (IS) 发生率的增加联系起来.
生物机制表明,PM通过各种病理途径影响IS,包括微RNA (miRNA) 失调.
在PM诱导的IS途径中miRNAs的精确作用需要进一步研究.

研究的目的:

研究特定的微RNA (miRNA) 在颗粒物 (PM) 暴露和缺血性中风 (IS) 之间的关联中的调解作用.
确定与IS相关的血中差异表达的miRNAs,在暴露于不同水平的PM的队列中.
阐明PM通过miRNA调制可能导致IS的途径.

主要方法:

利用基因表达综合 (GEO) 数据集来选与IS相关的miRNA.
在605个IS病例和605个匹配的对照中进行了嵌套病例控制研究.
用户土地使用回归 (LUR) 模型用于PM2.5和PM10估计和RT-qPCR用于miRNA表达分析.
进行调解分析以评估miRNAs在PM-IS关系中的作用.

主要成果:

从GEO数据中选了23个差异表达的miRNA;RT-qPCR在血样本中证实了15个.
确定了对hsa-miR-107,hsa-miR-320b,hsa-miR-423-5p,hsa-miR-483-5p和hsa-miR-935.5p的显著调节效应.
这些miRNAs调解了PM暴露与缺血性中风风险之间的关联.

结论:

颗粒物暴露可能通过改变特定循环miRNAs的表达来诱导缺血性中风.
确定了hsa-miR-107,hsa-miR-320b,hsa-miR-423-5p,hsa-miR-483-5p和hsa-miR-935作为关键的调解物.
这项研究突出了一个新的分子途径,将空气污染与心血管事件 (如IS) 联系起来.

关键词:

一个嵌套的病例控制研究.大气中的颗粒物.缺血性中风是因为缺血性中风.这是一个小RNARNA.

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相关概念视频

MicroRNAs

MicroRNAs

MicroRNA (miRNA) are short, regulatory RNA transcribed from introns (non-coding regions of a gene) or intergenic regions (stretches of DNA present between genes). Several processing steps are required to form biologically active, mature miRNA. The initial transcript, called primary miRNA (pri-mRNA), base-pairs with itself, forming a stem-loop structure. Within the nucleus, an endonuclease enzyme, called Drosha, shortens the stem-loop structure into hairpin-shaped pre-miRNA. After the pre-miRNA...