Haem oxygenase-1 prevents cell death by regulating cellular iron.

Journal Article (Journal Article)

Haem oxygenase-1 (HO1) is a heat-shock protein that is induced by stressful stimuli. Here we demonstrate a cytoprotective role for HO1: cell death produced by serum deprivation, staurosporine or etoposide is markedly accentuated in cells from mice with a targeted deletion of the HO1 gene, and greatly reduced in cells that overexpress HO1. Iron efflux from cells is augmented by HO1 transfection and reduced in HO1-deficient fibroblasts. Iron accumulation in HO1-deficient cells explains their death: iron chelators protect HO1-deficient fibroblasts from cell death. Thus, cytoprotection by HO1 is attributable to its augmentation of iron efflux, reflecting a role for HO1 in modulating intracellular iron levels and regulating cell viability.

Full Text

Duke Authors

Cited Authors

  • Ferris, CD; Jaffrey, SR; Sawa, A; Takahashi, M; Brady, SD; Barrow, RK; Tysoe, SA; Wolosker, H; Barañano, DE; Doré, S; Poss, KD; Snyder, SH

Published Date

  • July 1999

Published In

Volume / Issue

  • 1 / 3

Start / End Page

  • 152 - 157

PubMed ID

  • 10559901

International Standard Serial Number (ISSN)

  • 1465-7392

Digital Object Identifier (DOI)

  • 10.1038/11072


  • eng

Conference Location

  • England