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Telomeres are the tandem repetitive sequence at the end of chromosomes and its integrity is crucial for cell vitality. We studied the effect of (-)-epigallocatechin-3-gallate (EGCG), one of the major tea polyphenols, on telomeres in HeLa, 293 cells and MRC-5 fibroblasts. At concentrations of above 50 μM, EGCG was found to causes telomere fragmentation in HeLa cells as a result of single-strand breaks...
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