The A allele of the single nucleotide polymorphism (SNP) rs28714259 was associated with an increased risk for developing anthracycline-induced congestive heart failure (CHF) in women with breast cancer, according to a release.1
To evaluate associations between SNPs and cardiotoxicity associated with doxorubicin, investigators analyzed genome-wide association data from 3431 women with breast cancer who received doxorubicin while enrolled in the phase 3 Eastern Cooperative Oncology Group (ECOG) 5103 clinical trial. Among these, 2% had CHF.
Researchers identified several SNPs associated with anthracycline-related CHF and selected 2 of the top SNPs for validation in independent data sets.
rs28714259 was associated with a higher risk for developing anthracycline-induced CHF among 2415 women with breast cancer enrolled in the trial. It was also associated with low ventricular ejection fraction, a sign of cardiotoxicity, among 828 women with breast cancer in the phase 3 BEATRICE study.
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This study has 2 key limitations: because not all of the clinical trials used the same criteria for evaluating cardiotoxicity, and the number of patients with anthracycline-induced cardiotoxicity was relatively low, additional studies in other patient groups and in the “real-world” clinical setting are necessary to validate these findings.
- New genetic biomarker identifies patients with increased risk for heart damage caused by anthracycline chemotherapy [news release]. Philadelphia, PA: American Association for Cancer Research; December 19, 2016. Accessed December 19, 2016.