CHICAGO — Being obese or having a higher body mass index (BMI) while carrying a BRCA (BReast CAncer gene) mutation is positively linked with higher levels of damage to the DNA in normal breast gland cells, new research suggests. The results of the study will be presented Sunday, March 18, at ENDO 2018, the 100th annual meeting of the Endocrine Society in Chicago, Ill.
Obesity is a known risk factor for breast cancer, and breast cancer has been shown to occur more frequently in BRCA mutation carriers who are obese than in those who are lean.
“These data show for the first time that obesity is associated with increased DNA damage in breast epithelium of BRCA mutation carriers,” lead study author Priya Bhardwaj, a Ph.D. student at Weill Cornell Medicine in New York, N.Y., and colleagues write in their abstract.
Bhardwaj and her colleagues analyzed archival breast tissue from 82 BRCA mutation carriers. Using immunofluorescence to stain the gamma-H2AX foci, which occur as a result of DNA damage, they examined the normal breast epithelium for DNA damage.
The researchers counted the number of gamma-H2AX foci and found a significant positive link between BMI and the number of gamma-H2AX foci
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