Chocolate compound works against cancer cell cycle

18/04/05 Researchers from the Lombardi Comprehensive Cancer Center at Georgetown University have shown how an ingredient found in chocolate seems to exert its anti-cancer properties — findings that might be used one day to design novel cancer treatments.  The study, published in the April issue of the journal Molecular Cancer Therapeutics, explains how pentameric procyanidin (pentamer), a natural compound found in cocoa, deactivates a number of proteins that likely work in concert to push a cancer cell to continually divide.  The full text of the article is available here.

Chocolate, like many other foods, is the source of many possible anti-cancer compounds, but Dickson stresses that this research, which is part of a series of studies conducted at Georgetown on the chocolate-cancer connection, does not mean that people who eat chocolate will either reduce their cancer risks or treat a current case. Although the study was conducted in breast cancer cell cultures, the finding could potentially apply to other cancers.  (The studies are being funded by MARS Incorporated.) 

Chocolate is made from the beans of cacao trees, and, like some other plants, are rich in natural antioxidants known as flavonoids. These antioxidants may protect cells from the damage caused by unstable molecules known as free radicals, which are thought to contribute to both heart disease and cancer development.  The primary family of flavonoids contributing to the antioxidant benefit in chocolate is the procyanidins, and of the various types of procyanidins, pentamer seem to be strongest, according to a number of studies. 

Given this, the Georgetown researchers looked at what happened when they used a purified preparation of pentamer on a variety of breast cancer cells, compared to treatment on normal breast cells.  They used a variety of tests to find and identify proteins that were deactivated in the cancer cells.

The Lombardi Comprehensive Cancer Center, part of Georgetown University Medical Center and Georgetown University Hospital, seeks to improve the diagnosis, treatment, and prevention of cancer through innovative basic and clinical research, patient care, community education and outreach, and the training of cancer specialists of the future. Lombardi is one of only 38 comprehensive cancer centers in the nation, as designated by the National Cancer Institute, and the only one in the Washington DC area.

http://gumc.georgetown.edu/communications/releases/release.cfm?ObjectID=4477