Researchers at Vanderbilt University have found a powerful new genetic risk factor for breast cancer.
Using data from population-based studies of women in Shanghai, China, Jirong Long, Ph.D., assistant professor of Medicine, and colleagues discovered a deletion in a cluster of genes, called APOBEC3 genes, that are known to trigger DNA mutation and which have previously been implicated in cancer.
If a woman has a deletion in one of the two sets of genes she inherits from her parents, her risk of breast cancer increases by 31 percent. If the deletion is present in both sets of genes, her risk increases by 76 percent.
“This is the first copy number variation or CNV identified for breast cancer and is one of the strongest common genetic risk variants identified so far for breast cancer,” the researchers reported in the Journal of the National Cancer Institute.
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