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    Am J Physiol Endocrinol Metab. 2009 Apr;296(4):E621-7. Epub 2009 Jan 13.

    Uncoupling protein-2 regulates lifespan in mice.

    Andrews ZB, Horvath TL.

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    Section of Comparative Medicine, Department of Obstretics, Yale University School of Medicine, 375 Congress Ave., LSOG 117, New Haven, CT 06519, USA. zane.andrews@med.monash.edu.au

    Abstract

    The long-term effects of uncoupled mitochondrial respiration by uncoupling protein-2 (UCP2) in mammalian physiology remain controversial. Here we show that increased mitochondrial uncoupling activity of different tissues predicts longer lifespan of rats compared with mice. UCP2 reduces reactive oxygen species (ROS) production and oxidative stress throughout the aging process in different tissues in mice. The absence of UCP2 shortens lifespan in wild-type mice, and the level of UCP2 positively correlates with the postnatal survival of superoxide dismutase-2 mutant animals. Thus UCP2 has a beneficial influence on cell and tissue function leading to increased lifespan.

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    PMID:
    19141680
    [PubMed - indexed for MEDLINE]
    PMCID:
    PMC2670629
    Free PMC Article

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