Research test identifies BRCA2 gene mutations that lead to breast, ovarian cancers

January 25, 2018

ROCHESTER, Minn. -- A new test developed by researchers at Mayo Clinic shows which mutations in the BRCA2 gene make women susceptible to developing breast or ovarian cancers. The research behind the test was published today in the American Journal of Human Genetics.

"Certain inherited mutations in the BRCA2 gene have been linked to breast and ovarian cancer," says Fergus Couch, Ph.D., lead author of the study. "This test offers an excellent way to predict whether individual inherited mutations cause cancer."

In their study, Dr. Couch and his co-authors describe a laboratory-based test that can establish which inherited mutations called variations of uncertain significance in the BRCA2 gene are involved in cancer.

"Up until now, it has only been possible to establish that 13 inherited mutations in BRCA2 are pathogenic and known to cause cancer," says Dr. Couch. "In this study, we identified 54 that increase the risk of cancer. Similarly, 21 known neutral mutations that do not increase risk of cancer can now be expanded to 73. These findings may help patients and their health care providers make better decisions about how to deal with information obtained through genetic testing."

Going forward, Dr. Couch says this research will make it possible to evaluate the potential involvement in cancer of many more inherited mutations in the BRCA2 gene.
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The study was funded by a National Cancer Institute specialized program of research excellence (SPORE) grant in breast cancer at Mayo Clinic (P50 CA116201), National Institutes of Health grants CA116167 and CA192393, and the Breast Cancer Research Foundation.

About Mayo Clinic Cancer Center

As a leading institution funded by the National Cancer Institute, Mayo Clinic Cancer Center conducts basic, clinical and population science research, translating discoveries into improved methods for prevention, diagnosis, prognosis and therapy. For information on cancer clinical trials, call the Clinical Trial Referral Office at 1-855-776-0015 (toll-free).

About Mayo Clinic

Mayo Clinic is a nonprofit organization committed to clinical practice, education and research, providing expert, comprehensive care to everyone who needs healing. Learn more about Mayo Clinic. Visit the Mayo Clinic News Network.

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