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Gene variation may elevate risk of liver tumor in patients with cirrhosis
Date:1/1/2008

A particular gene variation appears to significantly increase the risk that individuals with cirrhosis of the liver will go on to develop hepatocellular carcinoma (HCC), a liver tumor that is the third leading cause of cancer death. In the January 2 Journal of the American Medical Association, researchers from Massachusetts General Hospital (MGH) Cancer Center and colleagues in France describe finding that a single alteration in the epidermal growth factor (EFG) gene may greatly increase the risk of developing HCC.

If these results are confirmed, this EGF variation could be used to determine which cirrhotic patients should be screened more intensively for tumor development, says Kenneth Tanabe, MD, chief of Surgical Oncology at the MGH Cancer Center, the studys lead author. In addition, the molecular pathway controlled by EGF and its receptor EGFR which is known to be important in several types of cancer appears to be an excellent target for chemoprevention studies. This is a deadly cancer and so progress in prevention and early detection is critically important.

HCC is the sixth most common solid tumor worldwide and most commonly develops in individuals with cirrhosis, which may be caused by infection with the hepatitis B or C viruses. There are currently no effective treatments for most HCC patients, so there is considerable interest in strategies that may prevent development of the tumor.

EGFs normal function is to stimulate tissue growth. Animal studies have shown that elevated levels of this protein in the liver lead to tumor development and that blocking the proteins receptor can prevent development of liver cancer. The current study was designed to determine whether cirrhotic patients with higher EGF levels are at greater risk for liver cancer and to determine the influence of a particular inherited gene on EGF levels in cirrhotic patients.

The researchers focused on a known variation in the EGF gene th
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Contact: Stacy Neale
sneale@partners.org
617-643-3907
Massachusetts General Hospital
Source:Eurekalert

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