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目的:探讨人脐带间充质干细胞来源的外泌体(human umbilical cord mesenchymal stem cell-derived exosomes,hucMSC-Ex)对单侧输尿管梗阻(unilateral ureteral obstruction,UUO)所致大鼠肾小管间质纤维化的修复作用。方法:分离培养hucMSC并从培养上清液中提取hucMSC-Ex。采用单侧输尿管结扎法构建肾间质纤维化模型,将大鼠随机分为假手术组、UUO组和hucMSC-Ex组,每组6只,hucMSC-Ex组大鼠在术