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血管紧张素Ⅱ对胚胎干细胞向心肌细胞分化的作用

The Effect of Angiotensin Ⅱ on the Cardiac Differentiation in Embryonic Stem Cells

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【作者】 吴丽媛闫丽辉贾竹青王家骥周春燕张永珍

【Author】 WU Li-Yuan1),YAN Li-Hui1),JIA Zhu-Qing2),WANG Jia-Ji2), ZHOU Chun-Yan2)*,ZHANG Yong-Zhen1)*(1) Department of Cardiology,Peking University Third Hospital,Beijing 100191,China; 2) Department of Biochemistry and Molecular Biology,Peking University Health Science Center, Key Laboratory of Molecular Cardiovascular Sciences,Ministry of Education,Beijing 100191,China)

【机构】 北京大学第三医院心内科北京大学基础医学院生物化学与分子生物学系教育部分子心血管学重点实验室

【摘要】 为检测血管紧张素Ⅱ(angiotensinⅡ,AⅡ)对小鼠胚胎干细胞(embryonic stem cells,ESCs)向心肌细胞方向分化的作用,采用10-4mol/L维生素C诱导小鼠R1胚胎干细胞分化为心肌细胞.Western印记检测胚胎干细胞诱导分化的心肌细胞中表达血管紧张素Ⅱ1型受体(angiotensinⅡtype 1 receptor,AT1R).诱导分化期间用1μmol/L AⅡ刺激胚胎干细胞,计数搏动拟胚体的比例;诱导分化第14 d用real-time RT-PCR和Western印记检测心肌标志物的表达确定其作用.结果显示,与对照组相比,1μmol/L AⅡ处理组可显著增加搏动拟胚体的比例,上调心肌标志物mRNA的表达.预先用1μmol/L洛沙坦处理1 h后可显著阻碍这种上调作用.本实验结果表明,AⅡ通过AT1R可促进小鼠R1胚胎干细胞向心肌细胞分化.

【Abstract】 To investigate the effect of angiotensin Ⅱ(AⅡ) on the cardiac differentiation in embryonic stem cells(ESCs),R1 mouse ES cells were induced by 10-4 mol/L vitamin C to differentiate into cardiomyocytes.Western blotting revealed that angiotensin type 1 receptor(AT1R) expressed in cardiomyocytes derived from mouse embryonic stem cells.By administering 1μmol/L AⅡwith or without 1μmol/L Losartan(AT1R antagonist) pretreatment,we demonstrated that AⅡ significantly enhanced cardiac differentiation as determined by increased percentage of beating embryoid bodies and a higher expression level of cardiac markers.On the contrary,AⅡ stimulated differentiation was inhibited by the presence of AT1R antagonist.These findings suggested that AⅡ promoted differentiation of cardiomyo-cytes from embryonic stem cells via AT1R.

【基金】 国家自然科学基金项目(No.30570711,No.30871253,No.90919022,No.81070112);教育部高等学校学科创新引智计划(111引智计划)资助项目(No.B07001);北京市自然科学基金(No.7122200);北京市与中央在京高校共建项目~~
  • 【文献出处】 中国生物化学与分子生物学报 ,Chinese Journal of Biochemistry and Molecular Biology , 编辑部邮箱 ,2013年06期
  • 【分类号】R541
  • 【下载频次】169
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