Hereditary Cancer Gene Variants in Hispanic Men With a Personal or Family History of Prostate Cancer.

BACKGROUND

Mutations in several common hereditary cancer genes are associated with prostate cancer, but there is limited information on the prevalence of these mutations in Hispanic men.

MATERIALS AND METHODS

We selected men at high risk for genetic mutations from 1515 Hispanic men enrolled in the San Antonio Biomarkers of Risk for prostate cancer (SABOR) cohort. Inclusion criteria included men with a diagnosis of prostate cancer or a first-degree family history of prostate cancer. We performed germline genetic testing using the Color Genomics platform, sequencing 30 genes associated with hereditary cancer risk. Additionally, we assessed ancestral informative markers to determine the admixture of the ethnically unique cohort.

RESULTS

Of the 275 subjects who met selection criteria, 263 patients had sufficient samples for sequencing. We identified 3.8% of patients (10 of 263) with a pathogenic or likely pathogenic mutation in the 30 genes tested, of whom 70% would not have met established criteria for genetic testing. Six of these mutations were in BRCA1/2 or ATM. There was a significant inverse association between the percentage of Native American ancestry and the risk of prostate cancer, OR 0.11 (95% CI 0.02-0.76, P = .025).

CONCLUSION

Hispanic men with either a personal or family history of prostate cancer carry mutations in hereditary cancer genes at a significant rate, on par with non-Hispanic counterparts with similar risk factors.