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自噬在血管紧张素Ⅱ诱导心肌细胞肥大中的作用 被引量:2

Role of Autophagy in Angiotensin Ⅱ Induced Cardiac Hypertrophy
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摘要 【目的】探讨自噬在血管紧张素(Ang)Ⅱ诱导心肌细胞肥大中的作用。【方法】原代培养的乳鼠心肌细胞,采用AngⅡ干预建立心肌肥大的模型;在光学显微镜下观察心肌细胞的形态,采用Real time PCR技术检测心肌细胞肥大标志物心房利钠多肽(ANP)的表达、Western blot法检测LC3蛋白的表达。【结果】AngⅡ可抑制自噬相关基因LC3蛋白的表达。自噬阻断剂3-甲基腺嘌呤(3MA)会促进AngⅡ诱导的心肌细胞肥大。【结论】AngⅡ可能通过抑制自噬来诱导心肌细胞肥大。 [ Objective ] To investigate the role of autophagy in cardiac hypertrophy induced by angiotensin Ⅱ (Ang Ⅱ ). [ Methods ] Cardiac hypertrophy was induced by Ang Ⅱ incuhured neonatal rat cardiomyocytes. Morphology and expression of hypertrophy marker atrial natriuretic peptide (ANP) were detected by optical microscope and real time-PCR. Autophagic marker, LC3 level was tested by Western blotting. [ Results ] AngⅡ increased volume of cardiomyocyte, and up regulated RNA expression of ANP. Ang Ⅱ inhibited autophagy related gene LC3 protein expression. Blocking autophagy by 3-MA could significantly enhance myocardial hypertrophy induced by Ang Ⅱ. [ Conclusion] Ang Ⅱ may induce myocardial hypertrophy by inhibiting autophagy.
出处 《中山大学学报(医学科学版)》 CAS CSCD 北大核心 2012年第4期440-443,448,共5页 Journal of Sun Yat-Sen University:Medical Sciences
基金 国家自然科学基金(81170226/H0212)
关键词 心肌细胞 心肌肥大 血管紧张素Ⅱ 自噬 相同基因 微管蛋白1轻链3 cardiomyocyte hypertrophy angiotensin Ⅱ (Ang Ⅱ ) autophagy related gene LC3 ( Tiny tubes related proteins 1light chain 3)
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