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U of A medical researchers ID genetic marker for sporadic breast cancer
Date:5/28/2013

Medical researchers at the University of Alberta have pinpointed a genetic marker for sporadic breast cancer one of a handful identified to date in Caucasians.

Researchers have identified many genetic markers for familial breast cancers, but not for sporadic breast cancer which accounts for 80 per cent of all cases. Sambasivarao Damaraju, a professor with the Faculty of Medicine & Dentistry and a researcher at the Cross Cancer Institute, worked with his team to scan the DNA of about 7,200 Alberta women, including those who have had sporadic breast cancer and those who have not had cancer. Their genomes were scanned from DNA isolated from blood.

The results? Women who had sporadic breast cancer frequently had a genetic marker on chromosome 4 a marker that has never been associated with familial breast cancer cases.

"The frequency of this marker occurring was statistically significant," says Damaraju, who works in the Department of Laboratory Medicine & Pathology. "Genetic factors that predispose women to breast cancer is a subject of intense investigation in the research world. While 60 to 70 genetic risk factors have been identified for familial breast cancer, we don't know much about the genetic risk factors for sporadic breast cancer. So this finding is exciting, and shows us more research is needed in this area."

The team's findings were recently published in the peer-reviewed journal, PLoS One. Damaraju noted the team, which included co-author John Mackey and PhD student Yadav Sapkota, was multi-disciplinary, including basic scientists, medical oncologists, biostatisticians and epidemiologists. He also acknowledged the initial contributions to this work from previous trainees, Malinee Sridharan and Badan S. Sehrawat. Overall, he collaborated with colleagues from the U of A's School of Public Health, the Department of Oncology, and the Department of Agricultural, Food and Nutritional Sciences, as well as colleagues from the Cross C
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Contact: Raquel Maurier
rmaurier@ualberta.ca
780-492-5986
University of Alberta Faculty of Medicine & Dentistry
Source:Eurekalert

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