Journal
CANCER LETTERS
Volume 152, Issue 2, Pages 115-122Publisher
ELSEVIER IRELAND LTD
DOI: 10.1016/S0304-3835(99)00395-X
Keywords
bleomycin; Terminalia catappa; punicalagin; reactive oxygen species; anti-genotoxic effect
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Terminalia catappa L. is a popular folk medicine for preventing hepatoma and treating hepatitis in Taiwan. In this paper, we examined the protective effects of T. catappa leaf water extract (TCE) and its major tannin component, punicalagin, on bleomycin-induced genotoxicity in cultured Chinese hamster ovary cells. Pre-treatment with TCE or punicalagin prevented bleomycin-induced hgprt gene mutations and DNA strand breaks. TCE and punicalagin suppressed the generation of bleomycin-induced intracellular free radicals, identified as superoxides and hydrogen peroxides. The effectiveness of TCE and punicalagin against bleomycin-induced genotoxicity could be, at least in part, due to their antioxidative potentials. (C) 2000 Elsevier Science Ireland Ltd. All rights reserved.
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