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MiR-20b-5p涉及由高homocysteinemia诱导的血管衰老

Hao Qin¹, Long-Long Hu¹, Wen-Jun Wang²

¹Department of Cardiovascular Medicine, The Second Affiliated Hospital of Nanchang University, Nanchang 330006, Jiangxi, People's Republic of China.

Experimental gerontology

|November 15, 2023

概括

超同胞蛋白血症通过促进内皮细胞衰老来加速动脉样硬化. 这项研究确定miR-20b-5p是这个过程中的关键调节者,为血管疾病提供了潜在的治疗点.

科学领域:

心血管生物学心血管生物学
分子生物学分子生物学
基因组学就是基因组学.

背景情况:

超同胞蛋白血症 (HHcy) 是动脉样硬化 (AS) 的危险因素.
同类氨酸 (Hcy) 促进内皮细胞衰老,有助于AS.
微RNAs (miRNAs) 涉及HHcy病理生理学,但它们在HHcy中的动脉miRNA-mRNA网络中的作用尚未得到研究.

研究的目的:

在HHcy模型小鼠的动脉中研究miRNA和mRNA表达变化.
为了确定参与HHcy诱导的内皮细胞衰老的特定miRNA-mRNA相互作用.
阐明miR-20b-5p在与HHcy相关的内皮功能障碍中的作用.

主要方法:

用RNA测序分析miRNA和mRNA在HHcy小鼠动脉中的表达.
生物信息工具 (TargetScan,miRDB) 用于miRNA-mRNA对的预测.
在体外实验中使用HHcy人类静脉内皮细胞 (HUVEC) 验证标并评估细胞衰老标志物.

主要成果:

发现了216个mRNA和48个miRNA的显著差异表达.
预测有29个miRNA-mRNA对,其中miR-20b-5p和FJX1具有很高的相互作用潜力.
miR-20b-5p抑制在HHcy HUVEC中调高FJX1; HHcy诱导的衰老标志物 (ROS,SA-β-gal,p16,p21),这些标志物被miR-20b-5p抑制逆转.

结论:

HHcy显著改变了动脉miRNA和mRNA的表达特征.
miR-20b-5p在HHcy诱导的内皮细胞衰老中起着至关重要的作用.
针对miR-20b-5p可能为HHcy相关的血管并发症提供治疗策略.

关键词:

动脉样硬化 (AS) 是一种在FJX1上.过高同胞蛋白血症 (HHcy)衰老是一种衰老.在 miR-20b-5p 中.

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