Exogenous BH4/Bcl-2 peptide reverts coronary endothelial cell apoptosis induced by oxidative stress

S. Cantara, S. Donnini, A. Giachetti, P. E. Thorpe, M. Ziche

Research output: Contribution to journalArticle

34 Scopus citations

Abstract

Background: Vascular endothelium undergoes apoptosis when exposed to reactive oxygen species (ROS), including hydrogen peroxide and superoxide radicals. ROS are believed to be the cause of damage to small vessels during ischemia-reperfusion injury and of arterial damage during atherosclerosis. Hydrogen peroxide-induced apoptosis is mediated through the inhibition of Bcl-xl activity and caspase-3 and caspase-9 activation. The BH4 domain of the Bcl-2 family members is responsible for their antiapoptotic activity. The BH4 domains of Bcl-2 and Bcl-xl inhibit cytochrome c release and the loss of mitochondrial membrane potential. Methods and Results: The purpose of this project was to study the antiapoptotic effect of cell-permeant derivative of Bcl-2 (BH4 peptide) on endothelial cells exposed to stress conditions. BH4 peptide was conjugated to the cell-permeable peptide TAT and was applied to endothelial cells under conditions of serum starvation and hydrogen peroxide treatment. TAT-BH4 reduced caspase-3 activity and prevented apoptotic cell death. Conclusion: Our results indicate that TAT-BH4 peptide can protect endothelial cells from ROS-induced apoptosis.

Original languageEnglish (US)
Pages (from-to)202-207
Number of pages6
JournalJournal of Vascular Research
Volume41
Issue number2
DOIs
StatePublished - Apr 26 2004

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Keywords

  • Apoptosis
  • BH4/BcL-2
  • Endothelium
  • Oxidative stress

ASJC Scopus subject areas

  • Physiology
  • Cardiology and Cardiovascular Medicine

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