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Caloric restriction or catalase inactivation extends yeast chronological lifespan by inducing H 2 O 2 and superoxide dismutase activity

Mesquita, Ana, Weinberger, Martin, Silva, Alexandra, Sampaio-Marques, Belém, Almeida, Bruno, Leão, Cecília, Costa, Vítor, Rodrigues, Fernando, Burhans, William C., Ludovico, Paula·2010·Proceedings of the National Academy of Sciences

Abstract

The free radical theory of aging posits oxidative damage to macromolecules as a primary determinant of lifespan. Recent studies challenge this theory by demonstrating that in some cases, longevity is enhanced by inactivation of oxidative stress defenses or is correlated with increased, rather than decreased reactive oxygen species and oxidative damage. Here we show that, in Saccharomyces cerevisiae , caloric restriction or inactivation of catalases extends chronological lifespan by inducing elevated levels of the reactive oxygen species hydrogen peroxide, which activate superoxide dismutases that inhibit the accumulation of superoxide anions. Increased hydrogen peroxide in catalase-deficient cells extends chronological lifespan despite parallel increases in oxidative damage. These findings establish a role for hormesis effects of hydrogen peroxide in promoting longevity that have broad implications for understanding aging and age-related diseases.

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Metadata

Authors
Mesquita, A., Weinberger, M., Silva, A., Sampaio-Marques, B., Almeida, B., Leão, C., Costa, V., Rodrigues, F., Burhans, W. C., & Ludovico, P.
Affiliations
  • Instituto de Investigação em Ciências da Vida e Saúde (ICVS), Escola de Ciências da Saúde, Universidade do Minho, Campus de Gualtar, 4710-057 Braga, Portugal;
  • Department of Molecular and Cellular Biology, Roswell Park Cancer Institute, Buffalo, NY 14263;
  • Instituto de Biologia Molecular e Celular (IBMC), Universidade do Porto, 4150-180 Porto, Portugal; and
Venue
Proceedings of the National Academy of Sciences
Published
2010-08-09
Volume
107
Issue
34
Pages
15123-15128
ISSN
  • 0027-8424
  • 1091-6490
Cited by
240
References
4
Language
en

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