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目的探讨微小RNA-1224-5p(miR-1224-5p)靶向调控血红素加氧酶1(HMOX1)基因对大鼠心肌细胞H9C2缺血再灌注(I/R)损伤的影响。方法体外培养大鼠心肌细胞H9C2,模拟心肌I/R损伤。按照处理方法将大鼠心肌H9C2细胞分为对照组(Control组)、I/R组、I/R+anti-miR-con组、I/R+anti-miR-1224-5p组、I/R+anti-miR-1224-5p+si-con组、I/R+anti-miR-1224-5p+si-HMOX1组。qRT-PCR检测miR-