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首页> 外文期刊>Nature reviews neuroscience >Calcium-sensing receptor promotes high glucose-induced myocardial fibrosis via upregulation of the TGF-beta(1)/Smads pathway in cardiac fibroblasts
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Calcium-sensing receptor promotes high glucose-induced myocardial fibrosis via upregulation of the TGF-beta(1)/Smads pathway in cardiac fibroblasts

机译:通过在心脏成纤维细胞中的TGF-β(1)/ Smads途径的上调,钙传感受体通过上调促进高葡萄糖诱导的心肌纤维化

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摘要

Diabetic cardiomyopathy (DCM) is a major complication of diabetes and myocardial fibrosis is its major pathological feature. Calcium-sensing receptor (CaSR) is a G protein-coupled receptor and participates in the regulation of calcium homeostasis; it is implicated in a range of diseases, including myocardial ischemia/reperfusion injury, myocardial infarction and pulmonary hypertension. However, whether CaSR is associated with myocardial fibrosis in DCM has remained elusive. In the present study, type 1 diabetic (T1D) rats and primary neonatal rat cardiac fibroblasts (CFs) were used to observe changes in CaSR to assess its potential as an indicator of myocardial fibrosis. The in vivo experiments revealed that in the T1D and CaSR agonist (R568) groups, evident collagen (Col)-I and -III deposition was present after 12 weeks. Furthermore, the in vitro experiment indicated that the levels of transforming growth factor (TGF)-beta(1), phosphorylated (p-) protein kinase C, p-p38, p-Smad2, T beta RI, T beta RII, along with the intracellular Ca2+ levels and the content of TGF-beta(1) in the culture medium were significantly increased in a high-glucose (HG) group and an R568-treated group. Treatment with the CaSR inhibitor Calhex231 significantly inhibited the abovementioned changes. Collectively, the results indicated that the increase of CaSR expression in CFs may induce intracellular Ca2+ increases and the activation of TGF-beta(1)/Smads, and enhance the proliferation of CFs, along with the excessive deposition of Col, resulting in myocardial fibrosis. The present results indicate an important novel mechanism for HG-induced myocardial fibrosis and suggest that CaSR may be a promising potential therapeutic target for DCM.
机译:糖尿病心肌病(DCM)是糖尿病和心肌纤维化的主要并发症是其主要病理特征。钙传感受体(CASR)是G蛋白偶联受体,并参与钙稳态的调节;它涉及一系列疾病,包括心肌缺血/再灌注损伤,心肌梗死和肺动脉高血压。然而,CASR是否与DCM中的心肌纤维化有关,仍然难以捉摸。在本研究中,使用1型糖尿病(T1D)大鼠和原发性新生大鼠心脏成纤维细胞(CFS)来观察Casr的变化,以评估其作为心肌纤维化的指标的潜力。体内实验表明,在T1D和CasR激动剂(R568)组中,在12周之后存在明显的胶原(COL)-I和-III沉积。此外,体外实验表明,转化生长因子(TGF)-Beta(1),磷酸化(P-)蛋白激酶C,P-P38,P-Smad2,TβRI,TβRII以及在高葡萄糖(Hg)基团和R568处理基团中,培养基中的细胞内Ca2 +水平和TGF-β(1)的含量显着增加。用CasR抑制剂Calhex231治疗显着抑制上述变化。结果表明,CFS中CasR表达的增加可以诱导细胞内Ca2 +增加和TGF-β(1)/ smad的活化,并增强CFS的增殖,以及Col的过度沉积,导致心肌纤维化。本结果表明了HG诱导的心肌纤维化的重要组成机制,并表明CASR可以是DCM的有希望的潜在治疗靶标。

著录项

  • 来源
    《Nature reviews neuroscience》 |2019年第2期|共10页
  • 作者单位

    Harbin Med Univ Dept Pathophysiol 157 Baojian Rd Harbin 150086 Heilongjiang Peoples R China;

    Harbin Med Univ Dept Pathophysiol 157 Baojian Rd Harbin 150086 Heilongjiang Peoples R China;

    Harbin Med Univ Dept Pathophysiol 157 Baojian Rd Harbin 150086 Heilongjiang Peoples R China;

    Harbin Med Univ Dept Pathophysiol 157 Baojian Rd Harbin 150086 Heilongjiang Peoples R China;

    Harbin Med Univ Dept Pathophysiol 157 Baojian Rd Harbin 150086 Heilongjiang Peoples R China;

    Harbin Med Univ Dept Pathophysiol 157 Baojian Rd Harbin 150086 Heilongjiang Peoples R China;

    Harbin Med Univ Dept Pathophysiol 157 Baojian Rd Harbin 150086 Heilongjiang Peoples R China;

    Harbin Med Univ Dept Pathophysiol 157 Baojian Rd Harbin 150086 Heilongjiang Peoples R China;

    Harbin Med Univ Dept Pathophysiol 157 Baojian Rd Harbin 150086 Heilongjiang Peoples R China;

  • 收录信息
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 神经生理学;
  • 关键词

    diabetic cardiomyopathy; myocardial fibrosis; calcium sensitive receptor; fibroblasts; TGF-beta(1); Smads;

    机译:糖尿病心肌病;心肌纤维化;钙敏感受体;成纤维细胞;TGF-β(1);SMADS;

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