Inhibition of Cell Proliferation and Induction of Apoptosis During XXXX Induced Colon Carcinogenesis by Black Tea.

@entity35 @entity2985 @entity694 @entity1613
Tea (Camellia sinensis) is one of the most popular beverages, consumed worldwide. The health promoting properties of tea have been attributed to its antioxidative polyphenolic constituents and their oxidative products. The aim of the present study was to evaluate the chemopreventive efficacy of a black tea infusion on @entity2985 induced colonic @entity1613 , the aberrant crypt foci in @entity35 . @entity35 were injected with @entity2985 (15mg/kg.b.w.) and received oral administration of 1% and 2% (w/v) tea infusions from the 1(st)day of carcinogen application. The treatment was continued for 12 weeks. The colons were then assessed for aberrant crypt foci and compared with the untreated carcinogen control group. In situ cell proliferation and in situ apoptosis were also estimated using Brdu incorporation and the TUNEL method, respectively. Aberrant crypt foci were reduced significantly (by 44% in the 1% tea-treated and by about 40% in 2% tea-treated group). Significant decrease in proliferation and increase in apoptosis suggest a possible interplay between the two processes resulting in inhibition of @entity694 by black tea.
