thearubigin and Prostatic-Neoplasms

There is evidence that habitual consumption of green tea by Japanese men is correlated with a reduction in cancers, including prostate; soybean isoflavones are also associated with increased protection. The present study compared the anti-proliferative effect of black tea (Camellia sinensis) polyphenol, thearubigin (TR), alone or combined with the isoflavone genistein, on human prostate (PC-3) carcinoma cells. TR administered alone did not result in any alteration of cell growth. When combined with genistein, however, TR significantly inhibited cell growth and induced a G2/M phase cell cycle arrest in a dose dependent manner. These findings indicate the potential use of combined phytochemicals to provide protection against prostate cancer.

Topics: Anticarcinogenic Agents; Antioxidants; Catechin; Cell Cycle; Cell Division; DNA, Neoplasm; Drug Synergism; Genistein; Humans; Japan; Male; Phenols; Phytotherapy; Polyphenols; Prostatic Neoplasms; Tea; Tumor Cells, Cultured