Zhang Yiming, Liu Zhao, Zhou Min, Liu Changjian
Department of Vascular Surgery, Nanjing Drum Tower Hospital, Affiliated Hospital of Nanjing University Medical School, Nanjing, Jiangsu 210008, P.R. China.
Exp Ther Med. 2016 Oct;12(4):2651-2656. doi: 10.3892/etm.2016.3672. Epub 2016 Sep 6.
Aberrant smooth muscle cells (SMCs) play important roles in the formation of abdominal aortic aneurysm (AAA). Although the molecular mechanism of AAA formation has been investigated, there is a lack of understanding concerning the role of microRNAs (miRNAs) in AAA, which the current study aimed to address. Firstly, miRNA array analysis was performed in order to compare the miRNA profiles in a mouse model of AAA with those in normal control mice, and differentially expressed miRNAs were identified. miR-129-5p was selected for further analysis, and was used to transfect human SMCs. The results of an MTT assay revealed that miR-129-5p inhibited the proliferation of SMCs, and flow cytometry indicated that apoptosis was induced. Bioinformatic analysis predicted that Wnt5a was the potential target gene of miR-129-5p, and this was verified by luciferase assay. In summary, miR-129-5p inhibits cellular proliferation, induces apoptosis and modulates the Wnt5a signaling pathway in SMCs.
异常平滑肌细胞(SMC)在腹主动脉瘤(AAA)形成过程中发挥重要作用。尽管已经对AAA形成的分子机制进行了研究,但对于微小RNA(miRNA)在AAA中的作用仍缺乏了解,而本研究旨在解决这一问题。首先,进行了miRNA阵列分析,以比较AAA小鼠模型与正常对照小鼠的miRNA谱,并鉴定出差异表达的miRNA。选择miR-129-5p进行进一步分析,并用于转染人SMC。MTT试验结果显示,miR-129-5p抑制SMC的增殖,流式细胞术表明其诱导了细胞凋亡。生物信息学分析预测Wnt5a是miR-129-5p的潜在靶基因,荧光素酶试验验证了这一点。总之,miR-129-5p抑制细胞增殖,诱导细胞凋亡并调节SMC中的Wnt5a信号通路。