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Analysis of plasma and urinary tea polyphenols in human subjects.
  • M. Lee, Z. Wang, +5 authors C. Yang
  • Medicine
  • Cancer epidemiology, biomarkers & prevention : a…
  • 1 June 1995
Tea has been shown to inhibit chemically induced tumorigenesis in many animal models, but the effects of tea consumption on human carcinogenesis are not conclusive. In order to develop biomarkers forExpand
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Inhibition of skin tumorigenesis by rosemary and its constituents carnosol and ursolic acid.
A methanol extract of the leaves of the plant Rosmarinus officinalis L. (rosemary) was evaluated for its effects on tumor initiation and promotion in mouse skin. Application of rosemary to mouse skinExpand
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Scavenging of hydrogen peroxide and inhibition of ultraviolet light-induced oxidative DNA damage by aqueous extracts from green and black teas.
Aqueous extracts of green and black teas have been shown to inhibit a variety of experimentally induced animal tumors, particularly ultraviolet (UV) B light-induced skin carcinogenesis. In theExpand
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Protection against ultraviolet B radiation-induced photocarcinogenesis in hairless mice by green tea polyphenols.
Our recent studies have shown that polyphenols present in green tea (GTP) possess significant antigenotoxic activity and afford protection against polycyclic aromatic hydrocarbon-induced skin tumorExpand
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Exceptional activity of tannic acid among naturally occurring plant phenols in protecting against 7,12-dimethylbenz(a)anthracene-, benzo(a)pyrene-, 3-methylcholanthrene-, and
Our recent studies have shown that naturally occurring dietary plant phenols such as tannic acid, quercetin, myricetin, and anthraflavic acid are capable of inhibiting polycyclic aromatic hydrocarbonExpand
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Effects of tea, decaffeinated tea, and caffeine on UVB light-induced complete carcinogenesis in SKH-1 mice: demonstration of caffeine as a biologically important constituent of tea.
Oral administration of green or black tea inhibited UVB light-induced complete carcinogenesis in the skin of SKH-1 mice. Green tea was a more effective inhibitor than black tea. Oral administrationExpand
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Nordihydroguaiaretic acid, an inhibitor of lipoxygenase, also inhibits cytochrome P-450-mediated monooxygenase activity in rat epidermal and hepatic microsomes.
Nordihydroguaiaretic acid (NDGA), a plant lignan and phenolic antioxidant, is a known lipoxygenase inhibitor. In this study, we investigated the effect of NDGA on rat epidermal and hepaticExpand
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Effect of dietary curcumin and ascorbyl palmitate on azoxymethanol-induced colonic epithelial cell proliferation and focal areas of dysplasia.
Curcumin, a major yellow pigment of turmeric obtained from powdered rhizomes of the plant Curcuma longa Linn., is commonly used as a coloring agent in foods, drugs and cosmetics. Ascorbyl palmitateExpand
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Interaction of epicatechins derived from green tea with rat hepatic cytochrome P-450.
Green tea has been used for generations in China and Asia as an antipyretic and diuretic. Prior studies have shown that extracts of green tea inhibit the mutagenicity of polycyclic aromaticExpand
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