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Science 25 February 1994:
Vol. 263. no. 5150, pp. 1128 - 1130
DOI: 10.1126/science.8108730

Articles

Science, Vol 263, Issue 5150, 1128-1130
Copyright © 1994 by American Association for the Advancement of Science


articles

Extension of life-span by overexpression of superoxide dismutase and catalase in Drosophila melanogaster

WC Orr and RS Sohal

Department of Biological Sciences, Southern Methodist University, Dallas, TX 75275.

The hypothesis that oxygen free radicals are causally involved in the aging process was tested by a study of the effects of simultaneous overexpression of copper-zinc superoxide dismutase and catalase. As compared to diploid controls, transgenic flies carrying three copies of each of these genes exhibited as much as a one-third extension of life-span, a longer mortality rate doubling time, a lower amount of protein oxidative damage, and a delayed loss in physical performance. Results provide direct support for the free radical hypothesis of aging.


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Psoralen photoactivation promotes morphological and functional changes in fibroblasts in vitro reminiscent of cellular senescence.
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Cloning, Expression, and Characterization of Two Manganese Superoxide Dismutases from Caenorhabditis elegans.
T. Hunter, W. H. Bannister, and G. J. Hunter (1997)
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Telomeres, Cancer, and Aging: Altering the Human Life Span.
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JAMA 278, 1345-1348
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Science. ISSN 0036-8075 (print), 1095-9203 (online)