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Old 01-17-2013, 07:05 AM
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Default Grape seed extract vs colorectal cancer

This study shows the effects of grape seed extract (not grapefruit seed extract) on aggressive colorectal cancer. Impressive. It seems the worse the cancer is, the better that gse can work.

Failure of anti-cancer therapy in colorectal cancer (CRC) cells involves resistance to death mechanisms. We investigated grape seed extract (GSE) ability to target CRC cells and delineated the mechanisms involved in GSE-induced CRC cell death. GSE selectively induced apoptotic death in human CRC cells; efficacy increased as the metastatic potential of the cancer cells increased. Oxidative stress, loss of mitochondrial membrane potential, modulation of pro- and anti-apoptotic proteins, and involvement of both caspase-dependent/independent apoptotic pathways contributed to GSE-induced CRC cell death. GSE intervention may serve as a multi-targeted CRC therapeutics, capable of inducing selective cancer cell death.
Go to this page for charts and more info http://www.sciencedirect.com/science...0438351200732X

And here is a case where you might want to avoid antioxidants during this therapy.

“It required less than half the concentration of GSE to suppress cell growth and kill 50 percent of stage IV cells than it did to achieve similar results in the stage II cells,” Derry says.

The group also discovered a likely mechanism of GSE’s preferential targeting of advanced colorectal cancer cells: when cancer cells were treated with antioxidants the GSE induced cell death was reversed and so Derry and colleagues consider it likely that GSE targets colorectal cancer through inducing oxidative stress that leads to the programmed cell death known as apoptosis.
“A colorectal cancer cell can have upwards of 11,000 genetic mutations – differences from the DNA in healthy cells. Traditional chemotherapies may only target a specific mutation and as cancer progresses more mutations occur. These changes can result in cancer that is resistance to chemotherapy. In contrast, the many bioactive compounds of GSE are able to target multiple mutations. The more mutations a cancer presents, the more effective GSE is in targeting them,” Derry says.
- Jim

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