E R Ravkin

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ABSTRACT The 24-hr cytotoxicities of a green tea polyphenol (GTP) extract to cell lines derived from the human oral cavity were assessed using the neutral red (NR) assay. The sequence of sensitivity was carcinoma HSC-2 cells > immortalized gingival GT1 fibroblasts > normal gingival HGF-2 fibroblasts. The GTP extract generated hydrogen peroxide (H(2)O(2)) in(More)
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