Effect of propofol on calcium homeostasis in hypoxia-reoxygenated neonatal rat cardiomyocytes

Eur J Pharmacol. 2008 Oct 10;594(1-3):139-45. doi: 10.1016/j.ejphar.2008.07.027. Epub 2008 Jul 17.

Abstract

Intracellular Ca2+ overload induced by hypoxia-reoxygenation alters Ca2+ homeostasis, which plays an important role in myocardial cell injury. Even though propofol is known as a radical scavenger with Ca2+ channel blocking properties, little is known about cardioprotective effect associated with Ca2+ homeostasis in cardiomyocytes. In the present study, we showed that propofol protects cardiomyocytes against hypoxia-reoxygenation injury. In propofol-treated cardiomyocytes, we observed a decrease in the expression of pro-apoptotic protein Bax, cytochrome c, caspase-3 activation and intracellular Ca2+ content. We also found that propofol treatment enhanced expression of anti-apoptotic protein Bcl-2 and activation of ERK concerned with survival. Propofol attenuated alterations of genes involving Ca2+-regulatory mechanism and significantly modulated abnormal changes of SERCA2a genes in hypoxia-reoxygenated neonatal cardiomyocytes. These results suggest that propofol modulates the expression of genes involved in Ca2+ homeostasis, thereby producing cardioprotective effects through a reduction in apoptotic cell death.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Anesthetics, Intravenous / pharmacology*
  • Animals
  • Animals, Newborn
  • Apoptosis / drug effects
  • Blotting, Western
  • Calcium / metabolism*
  • Calcium-Binding Proteins / biosynthesis
  • Calcium-Binding Proteins / genetics
  • Caspase 3 / metabolism
  • Cell Hypoxia / drug effects*
  • Cell Survival / drug effects
  • Gene Expression / drug effects
  • Homeostasis / drug effects*
  • In Situ Nick-End Labeling
  • Male
  • Microscopy, Confocal
  • Myocytes, Cardiac / drug effects*
  • Nerve Tissue Proteins / biosynthesis
  • Nerve Tissue Proteins / genetics
  • Propofol / pharmacology*
  • Rats
  • Rats, Sprague-Dawley
  • Reverse Transcriptase Polymerase Chain Reaction
  • Signal Transduction / drug effects

Substances

  • Anesthetics, Intravenous
  • Calcium-Binding Proteins
  • Nerve Tissue Proteins
  • Caspase 3
  • Calcium
  • Propofol