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miRNA-711-SP1-胶原Ⅰ型信号通路参与吡格列酮抗心肌梗死后心脏纤维化作用 被引量:4

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摘要 microRNAs在心脏纤维化中的作用已被广泛研究,但药物调控microRNAs发挥抗纤维化作用及其机制尚不明确.研究显示,吡格列酮能改善心脏纤维化,促进miR-711表达.本研究旨在阐明心肌梗死后吡格列酮改变miR-711表达产生的效应及其机制.结果提示,吡格列酮减少心肌梗死后Ⅰ型胶原表达,上调miR-711表达.心脏成纤维细胞中,吡格列酮促进miR-711表达,过表达miR-711抑制Ⅰ型胶原表达.阻抑miR-711,吡格列酮下调的I型胶原表达升高.生物信息学筛选SP1为miR-711的靶基因,经荧光素酶报告基因实验及Westernblot验证.此外,吡格列酮降低心肌梗死后SP1的表达量,成纤维细胞转染antagomir-711后,吡格列酮下调的SP1表达量升高.本研究发现,miR-711-SP1-I型胶原信号途径参与吡格列酮抗纤维化效应,为基于miRNAs的药物研究提供新的策略.
出处 《中国科学:生命科学》 CSCD 北大核心 2013年第6期464-472,共9页 Scientia Sinica(Vitae)
基金 国家自然科学基金重点项目(批准号:81030001) 国家自然科学基金(批准号:81100164 31271212和81070196) 教育部高等教育博士点基金(批准号:20100001110101 20110001120015) 北京人才基金会教育部新世纪优秀人才基金资助
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