Expression of Protein Kinase C Beta in the Heart Causes Hypertrophy in Adult Mice and Sudden Death in Neonates

J Clin Invest. 1997 Nov 1;100(9):2189-95. doi: 10.1172/JCI119755.

Abstract

Protein kinase C (PKC) activation in the heart has been linked to a hypertrophic phenotype and to processes that influence contractile function. To establish whether PKC activation is sufficient to induce an abnormal phenotype, PKCbeta was conditionally expressed in cardiomyocytes of transgenic mice. Transgene expression in adults caused mild and progressive ventricular hypertrophy associated with impaired diastolic relaxation, whereas expression in newborns caused sudden death associated with marked abnormalities in the regulation of intracellular calcium. Thus, the PKC signaling pathway in cardiocytes has different effects depending on the timing of expression and, in the adult, is sufficient to induce pathologic hypertrophy.

Publication types

  • Research Support, Non-U.S. Gov't
  • Research Support, U.S. Gov't, P.H.S.

MeSH terms

  • Age Factors
  • Animals
  • Animals, Newborn
  • Body Weight
  • Calcium / physiology
  • Cardiomegaly / enzymology*
  • Death, Sudden
  • Female
  • Isoenzymes / metabolism*
  • Isoproterenol / pharmacology
  • Male
  • Mice
  • Mice, Inbred C57BL
  • Mice, Transgenic
  • Myocardium / enzymology*
  • Protein Kinase C / metabolism*
  • Protein Kinase C beta
  • Sarcomeres / physiology

Substances

  • Isoenzymes
  • Protein Kinase C
  • Protein Kinase C beta
  • Isoproterenol
  • Calcium