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Vol. 14, No. 6, 2001
Issue release date: 2001
Skin Pharmacol Appl Skin Physiol 2001;14:358–362

Chemoprevention of Basal Cell Carcinomas in the ptc1+/– Mouse – Green and Black Tea

Hebert J.L. · Khugyani F. · Athar M. · Kopelovich L. · Epstein Jr. E.H. · Aszterbaum M.
Departments of Dermatology,aUniversity of California, San Francisco, Calif., bColumbia University, New York, N.Y., and cNational Cancer Institute, Division of Cancer Prevention, Bethesda, Md., USA

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Skin cancers are a rising menace as their incidence increases, attributed in part to increasing ultraviolet radiation exposure. This increasing problem has stimulated efforts to devise useful preventive approaches. The uncertain efficacy of exhortations to avoid sun exposure and to use protective clothing and sunscreens to reduce damage when exposed argue for the development of an oral chemopreventive agent. Bickers and others have studied the effects and mechanisms of tea and of its putative active components on inhibition of skin cancer in experimental models. To continue this work, we have studied the effects of oral green tea and black tea on a new model of ultraviolet-induced skin carcinogenesis – the development of basal cell carcinomas in ptc1+/– mice. To our surprise, we have found that tea preparations which others have used to prevent squamous cell carcinoma formation in mice fail to inhibit basal cell carcinogenesis in our model, suggesting that prevention of this cancer may require special, tumor-specific approaches.

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Drug Dosage: The authors and the publisher have exerted every effort to ensure that drug selection and dosage set forth in this text are in accord with current recommendations and practice at the time of publication. However, in view of ongoing research, changes in goverment regulations, and the constant flow of information relating to drug therapy and drug reactions, the reader is urged to check the package insert for each drug for any changes in indications and dosage and for added warnings and precautions. This is particularly important when the recommended agent is a new and/or infrequently employed drug.
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