Molecular and Cellular Biochemistry

, Volume 374, Issue 1–2, pp 113–123

Knockdown of dishevelled-1 attenuates cyclosporine A-induced apoptosis in H9c2 cardiomyoblast cells

  • Yejing Zhu
  • Jinyu Chi
  • Yue Liu
  • Yihua Sun
  • Yu Fu
  • Xiaohui Zhang
  • Xueliang Ding
  • Xinhua Yin
  • Dechao Zhao
Article

Abstract

Cyclosporine (CsA) has become a mainstay for immune suppression of organ transplants. It is known that patients receiving CsA manifest increased growth of aggressive cardiotoxicity. We have demonstrated that CsA induces myocardium cell apoptosis in vivo and vitro. Recently, dishevelled-1 (Dvl-1) protein, which is a cytoplasmic mediator of Wnt/β-catenin signaling, was explored in cardiac diseases. However, whether Dvl-1 is involved in CsA-induced apoptosis remains to be determined. The aim of this study was to explore the role of Dvl-1 in CsA-induced apoptosis in H9c2 cardiomyoblast cells and to investigate the role of the Wnt/β-catenin signaling cascade in this progress. H9c2 cells were treated with CsA in dose and time-dependent manners. We found that the appropriate concentrations and time-points of CsA-induced the expression of Dvl-1 and subsequent up-regulation of β-catenin and c-Myc, which is consistent with previously demonstrated concentrations and time-points when H9c2 cells apoptosis occurred. Then, cells were transfected with small interfering RNA (siRNA) against Dvl-1 and stimulated with previously demonstrated concentration of CsA. Dvl-1 down-regulation decreased the apoptotic rate, caspase-3 activity, and the Bax/Bcl-2 ratio in H9c2 cells treated with CsA. Furthermore, knocking down the expression of Dvl-1 partially suppressed the activity of the Wnt/β-catenin pathway. Moreover, we further deleted the downstream member β-catenin by specific siRNA, and found that CsA-induced the Bax/Bcl-2 ratio and the expression of c-Myc, which were attenuated. Our results are the first to unveil this novel aspect of Dvl-1 signaling. In addition, these data provide insight into the pathogenesis and the therapeutic strategies of CsA-induced myocardial injury.

Keywords

Cyclosporine A Dishevelled-1 Wnt/β-catenin signaling Apoptosis 

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Copyright information

© Springer Science+Business Media New York 2012

Authors and Affiliations

  • Yejing Zhu
    • 1
  • Jinyu Chi
    • 1
  • Yue Liu
    • 1
  • Yihua Sun
    • 2
  • Yu Fu
    • 1
  • Xiaohui Zhang
    • 1
  • Xueliang Ding
    • 1
  • Xinhua Yin
    • 1
  • Dechao Zhao
    • 1
  1. 1.Department of CardiologyThe First Affiliated Hospital of Harbin Medical UniversityHarbinPeople’s Republic of China
  2. 2.Department of Clinical LaboratoryThe Second Affiliated Hospital of Harbin Medical UniversityHarbinPeople’s Republic of China

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