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miR-15b-5p靶向CRKL基因对缺氧/复氧诱导心肌细胞凋亡和增殖的作用机制 被引量:1

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摘要 目的探讨微小RNA-15b-5p(miR-15b-5p)靶向CRKL基因对缺氧/复氧(H/R)诱导心肌细胞凋亡及增殖的作用机制。方法构建miR-15b-5p低表达及CRKL高表达的H9C2心肌细胞系并进行H/R处理,qRT-PCR检测miR-15b-5p及CRKL mRNA表达,Western印迹检测CRKL蛋白表达水平,流式细胞术检测细胞凋亡变化,MTT实验检测细胞增殖,双荧光素酶报告基因验证miR-15b-5p与CRKL的靶向关系。结果与Con组相比,H/R组H9C2心肌细胞中miR-15b-5p表达显著升高,CRKL mRNA及蛋白表达显著降低(P<0.05);与H/R+anti-miR-NC组相比,抑制miR-15b-5p表达可抑制心肌细胞凋亡,促进细胞增殖;与H/R+pcDNA组相比,CRKL过表达可诱导心肌细胞增殖,抑制细胞凋亡;双荧光素酶报告基因显示,转染miR-15b-5p+野生型CRKL-3′UTR报告基因载体组荧光素酶活性明显下降;转染miR-15b-5p inhibitor+野生型CRKL-3′UTR和转染miR-15b-5p mimic+突变型CRKL-3′UTR报告基因载体组荧光素酶活性没有变化;抑制CRKL表达可逆转抑制miR-15b-5p表达对H/R诱导的心肌细胞凋亡和增殖的作用。结论miR-15b-5p可负向调控CRKL基因表达进而促进H/R诱导的心肌细胞凋亡并抑制心肌细胞增殖。
出处 《中国老年学杂志》 CAS 北大核心 2021年第11期2393-2398,共6页 Chinese Journal of Gerontology
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