From Anrep's phenomenon to myocardial hypertrophy: Role of the Na+/H+ exchanger

Irene L. Ennis, Horacio E. Cingolani, Carolina D. Garciarena, María C. Camilión de Hurtado, María C. Villa-Abrille, Ernesto A. Aiello, Néstor G. Pérez

Research output: Contribution to journalReview article

Abstract

In this review, the enhanced activity of the cardiac Na+/H+ exchanger is considered to be a key step in the intracellular signaling pathway leading to cardiac hypertrophy, and the inhibition of the exchanger is a pharmacological tool to prevent or regress it. This enhanced activity has been demonstrated after stretching neonatal rat cardiomyocytes and cat papillary muscles. In the latter preparation, the activation of the exchanger results in a mechanical counterpart, the slow force response to stretch. The chain of events triggered by a stretch begins with the release of angiotensin II (Ang II), which in turn releases endothelin (ET) and ends with the increase in [Ca2+]i through the Na+/Ca2+ exchanger (NCX) in its reverse mode and the activation of the calcineurin/NFAT pathway. It should be emphasized that the link proposed herein between myocardial stretch and Ang II/ET relies upon the release of small amounts of these peptides. Higher concentrations of either of them may trigger Ca2+ influx through mechanisms other than NCX, and induce cardiac hypertrophy by the activation of widely recognized intracellular signaling pathways.

Original languageEnglish (US)
Pages (from-to)149-164
Number of pages16
JournalCurrent Cardiology Reviews
Volume3
Issue number2
DOIs
StatePublished - May 1 2007

Keywords

  • Angiotensin II
  • Endothelin
  • Hypertrophy
  • NHE-1
  • Slow force response

ASJC Scopus subject areas

  • Cardiology and Cardiovascular Medicine

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    Ennis, I. L., Cingolani, H. E., Garciarena, C. D., Camilión de Hurtado, M. C., Villa-Abrille, M. C., Aiello, E. A., & Pérez, N. G. (2007). From Anrep's phenomenon to myocardial hypertrophy: Role of the Na+/H+ exchanger. Current Cardiology Reviews, 3(2), 149-164. https://doi.org/10.2174/157340307780618343