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The induction of heme oxygenase by both hydrogen peroxide and UVA (365 nm) radiation in normal human skin fibroblasts is prevented by prior treatment of cells with the specific iron chelators, o-phenanthroline or desferrioxamine. In addition, both iron chelators protected cells against the lethal effects of H2O2 treatment or UVA irradiation. We propose that the generation of the highly reactive hydroxyl radical by an iron catalyzed Fenton reaction is involved both in the induction of this stress response and, at least in part, in cell killing by the two treatments. These results are also consistent with the idea that the heme oxygenase gene is induced in response to oxidative stress and that its induction may constitute an inducible protective mechanism against oxidative damage induced by both hydrogen peroxide and UVA radiation.
S M Keyse, and
R M Tyrrell
August 1990,
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S M Keyse, and
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February 1992,
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S M Keyse, and
R M Tyrrell
June 1990,
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S M Keyse, and
R M Tyrrell
April 1989,
Photochemistry and photobiology,
S M Keyse, and
R M Tyrrell
December 2011,
Bioscience trends,
S M Keyse, and
R M Tyrrell
August 1999,
Proceedings of the National Academy of Sciences of the United States of America,
S M Keyse, and
R M Tyrrell
December 1995,
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S M Keyse, and
R M Tyrrell
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S M Keyse, and
R M Tyrrell
February 1998,
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S M Keyse, and
R M Tyrrell
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Free radical research,
