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Abstract
Abstract: A rye bran diet has been suggested to retard prostate cancer growth and increase tumor cell apoptosis in animal models and in men with prostate cancer. Transgenic mice designed to develop prostate cancer (transgenic adenocarcinoma of the mouse prostate, TRAMP) were therefore treated with a rye bran diet. TRAMP mice were fed a rye bran (n =13) or a control diet (n = 15) from 4 to 24 wk of age. Tumor histology, cell proliferation, and apoptosis were accessed using stereological and immunohistochemical techniques. In the dorsolateral prostate lobe in TRAMP mice, epithelial cell apoptosis was increased by 31%, and the volume fraction of epithelial cells was reduced by 20% (P < 0.05) in the rye bran-treated group compared with the control diet group. There were, however, no significant changes detected in lobe weights or tumor grade. In conclusion, a rye bran diet increases epithelial apoptosis and reduces the epithelial cell fraction in TRAMP tumors.