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Excessive alcohol consumption may lead to increased cancer risk
Date:4/21/2010

WASHINGTON, D.C. Researchers have detected a link between alcohol consumption, cancer and aging that starts at the cellular level with telomere shortening.

Results of this cross-sectional study were presented at the American Association for Cancer Research 101st Annual Meeting 2010, held here, April 17-21, at the Walter E. Washington Convention Center.

Telomeres are found at the region of DNA sequences at the end of a chromosome, and are important for the genetic stability of cells. As people age, telomere length shortens progressively.

Excessive use of alcohol has been linked to oxidative stress and inflammation, two mechanisms that accelerate telomere shortening. Since telomere shortening is thought to increase cancer risk, the researchers speculated that those with shorter telomeres due to heavy alcohol consumption would have an increased risk of cancer.

"Heavy alcohol users tend to look haggard, and it is commonly thought heavy drinking leads to premature aging and earlier onset of diseases of aging. In particular, heavy alcohol drinking has been associated with cancer at multiple sites," said lead researcher Andrea Baccarelli, M.D., Ph.D.

"All the cells in our body have a biological clock in telomeres," noted Baccarelli, who is head of the Center of Molecular and Genetic Epidemiology, Ca' Granda Hospital Foundation, University of Milan, Italy.

Using real-time polymerase chain reaction, the researchers measured serum DNA among 59 participants who abused alcohol (22 percent consumed four or more alcoholic drinks per day) and 197 participants with variable alcohol consumption habits (4 percent consumed four or more alcoholic drinks per day).

The two groups were similar in age and other factors that might affect telomere length, such as diet, physical exercise, work-related stress and environmental exposures.

Results showed that telomere length was dramatically shortened in those wh
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Contact: Jeremy Moore
jeremy.moore@aacr.org
267-646-0557
American Association for Cancer Research
Source:Eurekalert

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