Exercise can prevent and reverse the severity of hypertrophic cardiomyopathy.

Published

Journal Article

Hypertrophic cardiomyopathy (HCM) is the most common form of sudden death in young competitive athletes. However, exercise has also been shown to be beneficial in the setting of other cardiac diseases. We examined the ability of voluntary exercise to prevent or reverse the phenotypes of a murine model of HCM harboring a mutant myosin heavy chain (MyHC). No differences in voluntary cage wheel performance between nontransgenic (NTG) and HCM male mice were seen. Exercise prevented fibrosis, myocyte disarray, and induction of "hypertrophic" markers including NFAT activity when initiated before established HCM pathology. If initiated in older HCM animals with documented disease, exercise reversed myocyte disarray (but not fibrosis) and "hypertrophic" marker induction. In addition, exercise returned the increased levels of phosphorylated GSK-3beta to those of NTG and decreased levels of phosphorylated CREB in HCM mice to normal levels. Exercise in HCM mice also favorably impacted components of the apoptotic signaling pathway, including Bcl-2 (an inhibitor of apoptosis) and procaspase-9 (an effector of apoptosis) expression, and caspase-3 activity. Remarkably, there were no differences in mortality between exercised NTG and HCM mice. Thus, not only was exercise not harmful but also it was able to prevent and even reverse established cardiac disease phenotypes in this HCM model.

Full Text

Duke Authors

Cited Authors

  • Konhilas, JP; Watson, PA; Maass, A; Boucek, DM; Horn, T; Stauffer, BL; Luckey, SW; Rosenberg, P; Leinwand, LA

Published Date

  • March 3, 2006

Published In

Volume / Issue

  • 98 / 4

Start / End Page

  • 540 - 548

PubMed ID

  • 16439687

Pubmed Central ID

  • 16439687

Electronic International Standard Serial Number (EISSN)

  • 1524-4571

Digital Object Identifier (DOI)

  • 10.1161/01.RES.0000205766.97556.00

Language

  • eng

Conference Location

  • United States