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Higher levels of vitamin B6, common amino acid associated with lower risk of lung cancer
Date:6/15/2010

This release is available in Chinese.

An analysis that included nearly 400,000 participants finds that those with higher blood levels of vitamin B6 and the essential amino acid methionine (found in most protein) had an associated lower risk of lung cancer, including participants who were current or former smokers, according to a study in the June 16 issue of JAMA.

Previous research has suggested that deficiencies in B vitamins may increase the probability of DNA damage and subsequent gene mutations. "Given their involvement in maintaining DNA integrity and gene expression, these nutrients have a potentially important role in inhibiting cancer development, and offer the possibility of modifying cancer risk through dietary changes," the authors write. They add that deficiencies in nutrient levels of B vitamins have been shown to be high in many western populations.

Paul Brennan, Ph.D., of the International Agency for Research on Cancer, Lyon, France, and colleagues conducted an investigation of B vitamins and methionine status based on serum samples from the European Prospective Investigation into Cancer and Nutrition (EPIC) cohort study, which recruited 519,978 participants from 10 European countries between 1992 and 2000, of whom 385,747 donated blood. By 2006, 899 lung cancer cases were identified and 1,770 control participants were individually matched by country, sex, date of birth, and date of blood collection.

After an analysis of the incidence rate of lung cancer within the entire EPIC cohort and adjusting for various factors, the researchers found a lower risk for lung cancer among participants with increasing levels of B6 (comparing the fourth vs. first quartile of B6 levels). A lower risk was also seen for increasing methionine levels. "Similar and consistent decreases in risk were observed in never, former,
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Contact: Paul Brennan, Ph.D.
Brennan@iarc.fr
JAMA and Archives Journals
Source:Eurekalert

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