肥大心肌细胞来源外泌体差异表达microRNA及其信号通路调节的初步研究

发布时间：2018-10-17 13:33

【摘要】：目的获得肥大心肌细胞来源外泌体与正常心肌细胞来源外泌体差异表达microRNA,并进行靶基因和信号通路分析,探讨差异表达microRNA调控心肌肥大的分子机制。方法取1~3天龄Wistar新生鼠心脏行原代心肌细胞培养,并分成两组,模型组用AngⅡ(1μmol/L)诱导心肌细胞肥大,对照组细胞未给予任何处理或加入培养液,分离纯化上述两组细胞外泌体,采用microRNA测序技术筛选差异表达microRNA,通过miRanda算法分析差异表达microRNA靶基因,并行KEGG pathway分析。结果与对照组比较,肥大心肌细胞来源外泌体有14个差异表达microRNA,其中13个microRNA上调(包括mmu-miR-2137、mmu-miR-5126、mmu-miR-690和10个新发现的microRNA),1个microRNA下调(P0.05)。通过miRanda算法得到差异表达microRNA的靶基因54条,采用排序前20的靶标基因及其相关microRNA构建局部网络图。经KEGG通路分析发现,差异表达microRNA参与了MAPK信号通路、PI3K-Akt信号通路、Wnt信号通路等的调节。结论肥大心肌细胞来源外泌体microRNA表达谱发生明显变化,并经靶基因调节MAPK等多种信号通路,进而影响心肌肥大的病理生理过程。
[Abstract]:Objective to obtain differential expression of microRNA, from exocrine from hypertrophic cardiomyocytes and normal cardiac myocytes, and analyze the target gene and signal pathway to explore the molecular mechanism of differential expression of microRNA in regulating myocardial hypertrophy. Methods Primary cardiomyocytes were cultured in the hearts of 1-day old Wistar neonatal rats and divided into two groups. In the model group, cardiomyocyte hypertrophy was induced by Ang 鈪，

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