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    Planta Med. 2009 Feb;75(3):216-21. Epub 2008 Dec 11.

    Epigallocatechin gallate from green tea (Camellia sinensis) increases lifespan and stress resistance in Caenorhabditis elegans.

    Abbas S, Wink M.

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    Institute of Pharmacy and Molecular Biotechnology, University of Heidelberg, Heidelberg, Germany.

    Abstract

    Epigallocatechin gallate (EGCG) is a major green tea polyphenol with pronounced antioxidative activity. The effects of EGCG on lifespan and stress resistance in wild-type N2 and transgenic strains of Caenorhabditis elegans [ HSP-16.2/GFP, MEV-1(KN1), FEM-1(HC17)] were investigated. The expression of HSP-16.2 (induced by the pro-oxidant juglone) and the intracellular levels of H (2)O (2) were inhibited by EGCG treatment. Daily administration of 220 muM EGCG increased the mean lifespan by 10.14 % and 14.27 % in N2 and FEM-1(HC17) strains, respectively, and 55 muM EGCG increased the mean lifespan in MEV-1(KN1) by 16.11 %. The survival rate was also increased under lethal oxidative stress by 65.05 %. These findings suggest that the increased mean lifespan and stress resistance in C. ELEGANS apparently depend, among other factors, on the antioxidant properties of EGCG.

    PMID:
    19085685
    [PubMed - indexed for MEDLINE]

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