Protein kinase Cδ activation induces apoptosis in response to cardiac ischemia and reperfusion damage: A mechanism involving bad and the mitochondria

Christopher L. Murriel, Eric Churchill, Koichi Inagaki, Luke I. Szweda, Daria Mochly-Rosen

Research output: Contribution to journalArticlepeer-review

176 Scopus citations

Abstract

Heart attacks caused by occlusion of coronary arteries are often treated by mechanical or enzymatic removal of the occlusion and reperfusion of the ischemic heart. It is now recognized that reperfusion per se contributes to myocardial damage, and there is a great interest in identifying the molecular basis of this damage. We recently showed that inhibiting protein kinase Cδ (PKCδ) protects the heart from ischemia and reperfusion-induced damage. Here, we demonstrate that PKCδ activity and mitochondrial translocation at the onset of reperfusion mediates apoptosis by facilitating the accumulation and dephosphorylation of the pro-apoptotic BAD (Bcl-2-associated death promoter), dephosphorylation of Akt, cytochrome c release, PARP (poly(ADP-ribose) polymerase) cleavage, and DNA laddering. Our data suggest that PKCδ activation has a critical pro-apoptotic role in cardiac responses following ischemia and reperfusion.

Original languageEnglish (US)
Pages (from-to)47985-47991
Number of pages7
JournalJournal of Biological Chemistry
Volume279
Issue number46
DOIs
StatePublished - Nov 12 2004

ASJC Scopus subject areas

  • Biochemistry
  • Molecular Biology
  • Cell Biology

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