Chemoprevention of Basal Cell Carcinomas in the ptc1+/– Mouse – Green and Black TeaHebert 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
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.
Michelle Aszterbaum, MD
Room 269, Bldg 100, San Francisco General Hospital
1001 Potrero Ave., San Francisco, CA 94110 (USA)
Tel. +1 415 647 3992, Fax +1 415 647 3996
Number of Print Pages : 5
Number of Figures : 2, Number of Tables : 0, Number of References : 23
Skin Pharmacology and Applied Skin Physiology (Journal of Pharmacological and Biophysical Research)
Incorporating ‘Bioengineering and the Skin’; Founded in 1988 by H. Schaefer
Official Journal of the Skin Pharmacology Society (SPS)
Vol. 14, No. 6, Year 2001 (Cover Date: November-December 2001)
Journal Editor: Hans F. Merk, Aachen
ISSN: 1422–2868 (print), 1422–2906 (Online)
For additional information: http://www.karger.com/journals/sph