Nitric oxide induces cell death by regulating anti-apoptotic BCL-2 family members

Colleen M. Snyder*, Emelyn H. Shroff, Jing Liu, Navdeep S. Chandel

*Corresponding author for this work

Research output: Contribution to journalArticle

69 Scopus citations

Abstract

Nitric oxide (NO) activates the intrinsic apoptotic pathway to induce cell death. However, the mechanism by which this pathway is activated in cells exposed to NO is not known. Here we report that BAX and BAK are activated by NO and that cytochrome c is released from the mitochondria. Cells deficient in Bax and Bak or Caspase-9 are completely protected from NO-induced cell death. The individual loss of the BH3-only proteins, Bim, Bid, Puma, Bad or Noxa, or Bid knockdown in Bim-/-/ Puma-/- MEFs, does not prevent NO-induced cell death. Our data show that the anti-apoptotic protein MCL-1 undergoes ASK1-JNK1 mediated degradation upon exposure to NO, and that cells deficient in either Ask1 or Jnk1 are protected against NO-induced cell death. NO can inhibit the mitochondrial electron transport chain resulting in an increase in superoxide generation and peroxynitrite formation. However, scavengers of ROS or peroxynitrite do not prevent NO-induced cell death. Collectively, these data indicate that NO degrades MCL-1 through the ASK1-JNK1 axis to induce BAX/BAK-dependent cell death.

Original languageEnglish (US)
Article numbere7059
JournalPloS one
Volume4
Issue number9
DOIs
StatePublished - Sep 21 2009

ASJC Scopus subject areas

  • Biochemistry, Genetics and Molecular Biology(all)
  • Agricultural and Biological Sciences(all)
  • General

Fingerprint Dive into the research topics of 'Nitric oxide induces cell death by regulating anti-apoptotic BCL-2 family members'. Together they form a unique fingerprint.

  • Cite this