Cisplatin-induced apoptosis of DRG neurons involves bax redistribution and cytochrome c release but not fas receptor signaling

Elizabeth S. McDonald, Anthony J. Windebank

Research output: Contribution to journalArticlepeer-review

92 Scopus citations

Abstract

Cisplatin causes apoptosis of DRG neurons in vitro and in vivo that can be prevented by high dose NGF. Design of a neuronal rescue strategy for patients receiving cisplatin will be facilitated by knowledge of the mechanism by which cisplatin causes DRG death. Inhibition of the fas receptor/ligand interaction prevents apoptosis in certain cancer cell lines treated with DNA damaging agents, including cisplatin. We demonstrated that killing curves from mice lacking a functional fas receptor and wild-type controls were not different over a wide range of therapeutically relevant concentrations. However, cisplatin treatment of DRG caused redistribution of cytosolic bax and mitochondrial release of cytochrome c. Bax redistribution was prevented by high dose NGF. This demonstrates for the first time that cisplatin does not signal for death via the fas pathway, but it does initiate the mitochondrial stress pathway in neurons and that NGF blocks death upstream of bax redistribution.

Original languageEnglish (US)
Pages (from-to)220-233
Number of pages14
JournalNeurobiology of Disease
Volume9
Issue number2
DOIs
StatePublished - Mar 2002

Keywords

  • Chemotherapy
  • Inbred MRL LPR
  • NGF withdrawal
  • Nerve growth factor
  • Neurotoxicity
  • Neurotrophins

ASJC Scopus subject areas

  • Neurology

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