HSP60, Bax, and Cardiac Apoptosis

Anne A Knowlton, S. Gupta

Research output: Contribution to journalArticle

26 Scopus citations

Abstract

HSP60 has long been known as an important chaperonin and as having key folding functions within the mitochondria. However, it has now become evident that significant amounts of HSP60 are found in extra-mitochondrial locations. This extra-mitochondrial HSP60 in the heart has key anti-apoptotic functions. Extra-mitochondrial HSP60 complexes with both bax and bak, but not with bcl-2. Reduction in HSP60 is sufficient to precipitate apoptosis. In the setting of hypoxia and reoxygenation HSP60 decreases with reoxygenation, but the apoptotic cascade has already been triggered by end-hypoxia. Redistribution of cytosolic HSP60 to the plasma membrane during hypoxia appears to contribute to the initiation of the apoptotic cascade with hypoxia and reoxygenation.

Original languageEnglish (US)
Pages (from-to)263-268
Number of pages6
JournalCardiovascular Toxicology
Volume3
Issue number3
DOIs
StatePublished - 2003

Keywords

  • Bax
  • Cardiac apoptosis
  • HSP60

ASJC Scopus subject areas

  • Toxicology
  • Cardiology and Cardiovascular Medicine

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