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Genetic variation linked to longer telomeres and lower risk of bladder cancer
Date:4/2/2011

ORLANDO, Fla. Using new genetic information, scientists have linked a commonly found human genetic variant with both longer telomeres and reduced risk of bladder cancer, according to findings presented at the AACR 102nd Annual Meeting 2011, held April 2-6, and simultaneously published in Cancer Prevention Research, a journal of the American Association for Cancer Research.

Jian Gu, Ph.D., assistant professor of epidemiology at The University of Texas MD Anderson Cancer Center, said the single-nucleotide polymorphism (SNP) rs398652 on 14q21 was linked to both longer telomeres and a 19 percent reduction in the risk of bladder cancer.

"This genetic locus is a determinant of both telomere length and bladder cancer risk, and long telomeres partially mediates the protective effect of the variant on bladder cancer," said Gu.

Gu and colleagues analyzed 300,000 SNPs in 459 healthy participants and found 15,120 of them that were associated with telomere length. They then conducted a further validation in 890 and 270 healthy participants and found four SNPs that were significantly associated with telomere length. Specific cross-analysis with genetic polymorphisms and risk of bladder cancer showed that rs398652 was associated with a 19 percent overall reduced risk of bladder cancer. Furthermore, smoking especially augmented the risk for bladder cancer in those people having the other genetic variant, associated with shorter telomeres.

AACR President Elizabeth H. Blackburn, Ph.D., the Morris Herzstein professor of biology and physiology in the department of biochemistry and biophysics at the University of California San Francisco, won the Nobel Prize in 2009 for her role in the discovery of telomeres and the enzyme telomerase.

In an accompanying editorial published in Cancer Prevention Research, Blackburn said that studies to date have not found a genetic link between both telomere length and cancer, which provides solid con
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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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