Navigation Links
Genetic variation cuts bladder cancer risk, protects chromosome tips
Date:4/2/2011

ORLANDO - A common genetic variation links to both bladder cancer risk and to the length of protective caps found on the ends of chromosomes, scientists at The University of Texas MD Anderson Cancer Center reported today at the AACR 102nd Annual Meeting.

These endings or tips, called telomeres, guard against chromosomal damage and genomic instability that can lead to cancer and other diseases.

"We found a single point of variation in the genome strongly associated with a 19 percent decrease in bladder cancer risk. The same variant also is linked to longer telomeres, which accounts for part of the overall reduction in risk," said first author Jian Gu, Ph.D., assistant professor in MD Anderson's Department of Epidemiology.

Telomere length diminishes with age, Gu said, and short telomeres are associated with age-related diseases such as stroke, Alzheimer's disease, diabetes, cardiovascular disease and cancer.

Previous studies separately tied telomere length either to cancer risk or to genetic variation. The paper by Gu and colleagues is the first to make both connections.

"Understanding the complex genetic regulation of telomere length and its relation to the causes of bladder and other types of cancer will help develop therapies or lifestyle changes to reduce cancer risk," said senior author Xifeng Wu, M.D., Ph.D., professor and chair of MD Anderson's Department of Epidemiology.

Wu and colleagues in 2003 were the first to show that short telomeres increase the risk of bladder, lung, kidney and head and neck cancers in a human epidemiological study.

Start with 300,000 SNPs

The new findings were presented by Gu at the AACR annual meeting and simultaneously published in Cancer Prevention Research, an AACR journal.

AACR President Elizabeth Blackburn, Ph.D., the Morris Herzstein professor of biology and physiology at the University of California San Francisco, won the Nobel Prize for Medicine or Physiology in 2009 for her role in the discovery of telomeres and the enzyme telomerase. She wrote an editorial in Cancer Prevention Research and appeared with Gu at a news conference Saturday to discuss the importance of the study results.

Researchers first conducted a genome-wide association study to identify genetic variations associated with telomere length. They analyzed more than 300,000 single nucleotide polymorphisms (SNPs), common points of variation in the genome, in 459 healthy controls.

This narrowed the field to 15,120 SNPs, which were then validated in 1,160 healthy controls in two independent populations. They selected the top four SNPs that were associated with telomere length across all three populations for the bladder cancer association study.

Then there was one

The team evaluated the association of these four sites with the risk of bladder cancer in a case-control study of 969 patients and 946 controls. Only one, a SNP on chromosome 14 known as rs398652, was associated with bladder cancer risk.

Since the SNP was associated with both telomere length and bladder cancer risk, the team conducted a mediation analysis to determine whether the effect on telomere length caused some of the risk reduction. Telomere length accounted for 14 percent of the SNP's effect on bladder cancer.

"We think the remaining portion of the SNP effect on bladder cancer may be caused by inflammation or immune response," Gu said. "But understanding the remainder of the risk will require more basic research." Rs398652 is nearest to a gene on chromosome 14 called PELI2, which is involved in the inflammatory and immune response.

Follow up studies will focus on whether this SNP is associated with other types of cancer, particularly those affected by telomere length such as lung, kidney and esophageal cancer, Gu said, as well as the biological mechanisms by which the SNP affects telomere length.


'/>"/>

Contact: Scott Merville
smerville@mdanderson.org
713-516-4855
University of Texas M. D. Anderson Cancer Center
Source:Eurekalert  

Related medicine news :

1. Do At-Home Genetic Tests Tell Too Much and Explain Too Little?
2. Most Breast Tumors Have Unique Genetic Fingerprint, Study Finds
3. Canadian Journal of Cardiology publishes advice on genetic testing of inherited cardiac arrhythmias
4. Mouse cancer genome unveils genetic errors in human cancers
5. Home Genetic Tests May Need Doctors Involvement: Report
6. FDA Weighs Pros, Cons of Home Genetic Testing
7. Mix of Genetics and Stress Can Impair Mental Abilities
8. Leicester leads on heart attack genetic link discovery
9. Where are new schizophrenia drugs? Experts convene to explore genetic and epigenetic solutions
10. Researchers pinpoint genetic pathways involved in breast cancer
11. Scientists Link Sets of Genetic Abnormalities to Autism Risk
Post Your Comments:
*Name:
*Comment:
*Email:
Related Image:
Genetic variation cuts bladder cancer risk, protects chromosome tips
(Date:8/16/2017)... ... 2017 , ... An August 3rd article on Reuters covers a new University of ... JAMA (the Journal of the American Medical Association). The study found that a lower percentage ... 30, when compared to patients with lower BMIs. At present, weight loss patients must have ...
(Date:8/16/2017)... ... August 16, 2017 , ... The Data Council, the leading ... was acquired by Advantage Solutions. The Data Council’s IX-ONE platform is the ... industry’s leading suppliers, brokers, distributors and retailers. The Data Council will become a ...
(Date:8/16/2017)... ... August 16, 2017 , ... In ... They celebrate 30 years in business this year, and they’re marking the milestone ... space to serve their patients. , It stands to reason that, given ...
(Date:8/16/2017)... ... August 16, 2017 , ... Modern Consulting Insurance & ... program. Partnering once again with Boys & Girls Clubs of Greater Kansas City, ... area’s very own American Idol. With all proceeds benefitting local worthy causes, donations ...
(Date:8/16/2017)... ... ... Paul Vitenas, MD, FACS , is honored to announce that he ... the nation’s top physicians, in a variety of specialties. This marks the fourth year ... Connolly’s coveted ranking. , Castle Connolly is the nation’s trusted provider of information on ...
Breaking Medicine News(10 mins):
(Date:8/2/2017)... , Aug. 2, 2017 ... Who,s Who as a Pinnacle Lifetime Professional in ... Key Account Manager at Turing Pharmaceuticals, AG. Her ... troubleshooting and relationship building.                ... more than 25 years of experience as a ...
(Date:8/1/2017)... 2017   CerSci Therapeutics , a non-opioid drug ... , has received notice from the National Institute on ... (NIH) that it has been awarded a Direct-to-Phase II ... in 2017 with an additional $1,000,000 to follow in ... application of their lead non-opioid drug candidate CT-044 to ...
(Date:7/28/2017)... July 28, 2017 Hill-Rom Holdings, Inc. ("Hill-Rom") ... third quarter ended June 30, 2017, and updated its ... For the fiscal third quarter, Hill-Rom ... $0.68 per diluted share in the prior-year period. These ... $0.39 per diluted share primarily related to the non-cash ...
Breaking Medicine Technology: