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CRON4healthyfuture
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 Posted: Sat Mar 25, 2006 8:57 am Post subject: Resveratrol fights colon cancer cells many different ways |
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Resveratrol pulls more strings than even NSAIDs in terms of the ways in which it can short-circuit colon cancer cells.
This is important because resveratrol taken orally is going to be most concentrated in the GI tract. More so than any other tissue in the body, resveratrol can work its "magic" here.
Of course, chemoprevention of cancer is not the same thing as "longer life", but, maybe, just maybe, you can get both out of resveratrol.
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| "Since the bioavailability of ingested RS at distant organs is low and apoptosis induction often requires relatively high RS levels (above 20 [mu]mol/l), this polyphenolic food ingredient might be particularly effective as a chemopreventive in the digestive tract. Previous studies have suggested that chemoprevention by non-steroidal anti-inflammatory drugs (NSAIDs) is blunted by the loss of a single component of the apoptotic machinery - the Bax protein. Here, we report that RS efficiently provokes apoptosis in human colorectal carcinoma cells deficient for Bax, although at a reduced rate compared to the parental cells, through the activation of the mitochondrial death pathway. Knockdown of pro-apoptotic Bak by RNA interference reduced the apoptotic response to a similar extent as Bax deficiency in the parental cells and completely abolished apoptosis in Bax-null cells. Notably, although negative for RS-induced, mitochondria-mediated apoptosis, Bax+Bak double-deficient cells were sensitized by RS to ligand-induced, death receptor-mediated apoptosis. Thus, in contrast to NSAIDs, RS may remain effective as a pro-apoptotic chemopreventive as long as Bax and Bak have not both been inactivated during clonal selection." - Anti-Cancer Drugs April 2006 |
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