Navigation Links
Genetic Risk Score Can Predict Odds For Breast Cancer
Date:7/28/2010

By Kathleen Doheny
HealthDay Reporter

TUESDAY, July 27 (HealthDay News) -- Taking advantage of recent discoveries of more genetic variants that raise the risk for breast cancer, European scientists have analyzed those variants in relation to breast cancer and found that the risk is greater with certain variants and for certain tumor types.

In the short term, the findings are expected to be of the most use to scientists in their effort to understand the biology of the disease.

"Our findings suggest that, at present, this type of polygenic risk score is unlikely to be a useful tool for population-based screening programs, but may be relevant for understanding biological mechanisms," said Dr. Gillian Reeves, a staff scientist at the Cancer Epidemiology Unit at the University of Oxford. She led the study, which is published in the July 28 issue of the Journal of the American Medical Association.

The study looked at more than 10,000 women with breast cancer, who were on average 58 years old when diagnosed, and more than 10,000 without breast cancer. All provided blood samples for genotyping in the years 2005 through 2008.

Reeves and her colleagues looked at 14 different alterations known as single-nucleotide polymorphisms (SNPs), small genetic changes within a person's DNA sequence that are associated with disease, and then tried to create a polygenic risk score.

They found the risk of breast cancer greatest for two SNPs and greater for estrogen receptor-positive forms of breast cancer than for ER-negative disease. In ER-positive tumors, estrogen fuels the tumor's growth.

"When the effects of the seven SNPs most strongly related to overall breast cancer risk were combined using a polygenic risk score, the cumulative risk of breast cancer to age 70 among women in the top fifth for such a score was twice that among women in the bottom fifth, 8.8 percent versus 4.4 percent," Reeves said. But the risk was greater for ER-positive disease than for ER-negative disease, the researchers found.

Reeves did not find that there were any interactions between the effects of the genes she researched and other, established risks for breast cancer.

The new study drew praise from another expert, Dr. Douglas Easton, a professor of genetic epidemiology and director of cancer research at the U.K. Genetic Epidemiology Unit, Strangeways Research Laboratory in Cambridge, U.K. "It's a nice study which takes the genetic markers which we and others have identified and estimates their effects in a prospective study."

The findings that some of the SNPs are more strongly associated with ER-positive breast cancer reflect his own findings. Overall, he said, the predictive values of the SNPs is relatively weak.

Since the Reeves study, Easton said, his team has identified seven additional SNPs that appear to be linked to breast cancer risk.

"There are now about 20 known susceptibility SNPs," he said. "As further SNPs are identified, the predictive value of these markers will clearly improve."

Soon, he said, SNPs for predicting ER-negative disease more strongly may also be discovered.

More information

To learn more about estrogen receptor-negative cancers, visit the U.S. National Cancer Institute.

SOURCES: Gillian Reeves, Ph.D., staff scientist, Cancer Epidemiology Unit, University of Oxford, U.K.; Douglas Easton, Ph.D., professor, genetic epidemiology, and director, Cancer Research UK Genetic Epidemiology Unit, Strangeways Research Laboratory, Cambridge, U.K.; July 28, 2010, Journal of the American Medical Association


'/>"/>
Copyright©2010 ScoutNews,LLC.
All rights reserved  

Related medicine news :

1. Can I buy you a drink? Genetics may determine sensitivity to other peoples drinking behavior
2. Yale scientists discover new genetic marker of ovarian cancer risk
3. Study implicates new epigenetic player in mental retardation and facial birth defects
4. Genetic Ancestry Data Improve Diagnosis in Asthma and Lung Disease
5. Scripps Center for Executive Health Now Offers Genetic Testing
6. Genetic regulator opens new avenues to AIDS, immune system research
7. Mount Sinai researchers find structural basis for incidence of skin cancers in a genetic disorder
8. New genetic analysis reveals principles of phenotypic expression
9. New research shows peer drug use may increase an individuals genetic tendency to use drugs
10. University of Utah researchers fight genetic killer of infants and toddlers
11. H1N1 Flu Undergoing Genetic Changes in Pigs
Post Your Comments:
*Name:
*Comment:
*Email:
Related Image:
Genetic Risk Score Can Predict Odds For Breast Cancer
(Date:4/28/2017)... ... , ... The Texas Cord Blood Bank (TCBB), a program of nonprofit biomedical ... Women’s Hospital at Renaissance in Edinburg for their outstanding efforts in collecting umbilical cord ... donate. , “Women’s Hospital at Renaissance has been a collection partner for the ...
(Date:4/28/2017)... (PRWEB) , ... April 28, 2017 , ... People are ... older people. “Wearing a hearing aid doesn’t have the stigma it had when great-grandpa ... Hearing Associates of Greater Boston, in a NALA North American Speaker Series ...
(Date:4/28/2017)... ... 2017 , ... Researchers at Moffitt Cancer Center ... Data Hub in a sample of participants enrolled in an ongoing cancer quality-of-life ... solutions for the global scientific community. The company’s new CentrePoint Data Hub is ...
(Date:4/28/2017)... ... April 28, 2017 , ... Woolsy Corporation Limited, a ... its Nova Skin Sciences division, recently announced the launch of Allumière Antiaging Cream, ... power of an anti-aging concentrate. , Anogeissus Leiocarpa Bark Extract and ...
(Date:4/28/2017)... ... April 28, 2017 , ... ... anniversary. SearchLight is the premier online modeling resource for fluorescence microscopists and optical ... active users during last 5 years spanning the globe, SearchLight has become a ...
Breaking Medicine News(10 mins):
(Date:4/19/2017)... -- Cardiology devices segment is anticipated to reach the highest ... Devices segment is likely to create absolute $ opportunity of ... 2017. By the end of 2027, Cardiology Devices segment is ... Mn, expanding at a CAGR of 18.4% over the forecast ... Pacific reprocessed medical devices market in terms of ...
(Date:4/19/2017)... , Tenn. and DALLAS , April 19, ... Inc., announced that the first patients in ... EndoStim device in the Lower Esophageal Sphincter Stimulation for ... minimally-invasive implantable device designed to provide long-term reflux control ... GERD affects nearly 65 million people in ...
(Date:4/19/2017)... April 19, 2017  Novartis today announced the ... Heart, Lung, and Blood Institute (NHLBI) of the ... of patients with treatment-naïve severe aplastic anemia (SAA) ... with eltrombopag at the initiation of and concurrently ... evaluated three sequential treatment groups, or cohorts. Cohort ...
Breaking Medicine Technology: