title: Epigallocatechin gallate from green tea (Camellia sinensis) increases lifespan and stress resistance in Caenorhabditis elegans.
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.
authors.affiliation: Institute of Pharmacy and Molecular Biotechnology, University of Heidelberg, Heidelberg, Germany.
authors.forename: Sami
authors.initials: S
authors.lastname: Abbas
authors.forename: Michael
authors.initials: M
authors.lastname: Wink
mesh_terms: D000818:Animals; D000975:Antioxidants / Q000494:pharmacology*; D002107:Caenorhabditis / Q000187:drug effects* / Q000254:growth & development / Q000378:metabolism; D029742:Caenorhabditis elegans Proteins / Q000037:antagonists & inhibitors / Q000378:metabolism; D028241:Camellia sinensis; D002392:Catechin / Q000031:analogs & derivatives* / Q000494:pharmacology; D016166:Free Radical Scavengers / Q000494:pharmacology*; D017930:Genes, Reporter / Q000502:physiology; D006360:Heat-Shock Proteins / Q000037:antagonists & inhibitors / Q000378:metabolism; D006861:Hydrogen Peroxide / Q000037:antagonists & inhibitors / Q000378:metabolism; D008136:Longevity; D018384:Oxidative Stress / Q000187:drug effects; D010936:Plant Extracts / Q000494:pharmacology*; D013481:Superoxides / Q000037:antagonists & inhibitors; D013662:Tea
chemical_list: D000975:Antioxidants; D029742:Caenorhabditis elegans Proteins; D016166:Free Radical Scavengers; D006360:Heat-Shock Proteins; D010936:Plant Extracts; D013662:Tea; C108431:hsp-16.2 protein, C elegans; D013481:Superoxides; D002392:Catechin; D006861:Hydrogen Peroxide; C045651:epigallocatechin gallate