Targeted Sprouty1 overexpression in cardiac myocytes does not alter myocardial remodeling or function

Nathan J. Charles, Robert C. Huebert, Sangjin Lee, Neeta Adhikari, Sean Polster, James E. Rider, Elizabeth Braunlin, Ami Mariash, Maggie Robledo, David Schuweiler, Jennifer L. Hall

Research output: Contribution to journalArticlepeer-review

1 Scopus citations

Abstract

The mitogen activated protein kinase (MAPK) signaling pathway regulates multiple events leading to heart failure including ventricular remodeling, contractility, hypertrophy, apoptosis, and fibrosis. The regulation of conserved intrinsic inhibitors of this pathway is poorly understood. We recently identified an up-regulation of Sprouty1 (Spry1) in a targeted approach for novel inhibitors of the MAPK signaling pathway in failing human hearts following reverse remodeling. The goal of this study was to test the hypothesis that up-regulated expression of Spry1 in cardiac myocytes would be sufficient to inhibit ERK1/2 activation and tissue remodeling. We established a murine model with up-regulated Spry1 expression in cardiac myocytes using the alpha-myosin heavy chain promoter (α-MHC). Heart weight and cardiac myocyte morphology were unchanged in adult male α-MHC-Spry1 mice compared to control mice. Ventricular function of α-MHC-Spry1 mice was unaltered at 8 weeks or 1 year of age. These findings were consistent with the lack of an effect of Spry1 on ERK1/2 activity. In summary, targeted up-regulation of Spry1 in cardiac myocytes is not sufficient to alter cell or tissue remodeling consistent with the lack of an effect on ERK1/2 activity.

Original languageEnglish (US)
Pages (from-to)57-62
Number of pages6
JournalMolecular and Cellular Biochemistry
Volume342
Issue number1-2
DOIs
StatePublished - Sep 2010

Keywords

  • Echocardiography
  • MAPkinase
  • Myocyte
  • Spry1

ASJC Scopus subject areas

  • Molecular Biology
  • Clinical Biochemistry
  • Cell Biology

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