In the largest clinical genomic study of metastatic prostate cancer among veterans, researchers from Moffitt Cancer Center, UCLA, and the University of Pennsylvania discovered critical differences in tumor biology between non-Hispanic Black and non-Hispanic white men. Published in JAMA Network Open, the study found that despite these biological variations, survival outcomes were similar when both groups had equal access to care, highlighting the potential of precision medicine to bridge racial disparities in cancer treatment.
The study analyzed genomic data from over 5,000 U.S. veterans with metastatic prostate cancer, collected between 2019 and 2023. Key findings revealed that non-Hispanic Black veterans had higher rates of genomic alterations linked to immunotherapy benefits, such as microsatellite instability. In contrast, non-Hispanic white veterans exhibited more mutations in DNA repair genes and the androgen receptor pathway, which could affect responses to hormonal therapies. Notably, no biomarker was identified that should be excluded based on race, underscoring the importance of equitable genomic testing.
Dr. Kosj Yamoah, senior author of the study, emphasized, “Precision oncology can be a powerful tool for achieving equitable cancer care by matching treatments to tumor biology, not race.” Dr. Isla Garraway, co-senior author, added that the research challenges historical disparities, urging broader access to genomic tools for all populations.
The study’s cohort included 36% non-Hispanic Black veterans, a significant improvement in diversity compared to earlier genomic research. Researchers stressed the need to expand access to next-generation sequencing and ensure that underrepresented groups are included in future studies.
This groundbreaking study demonstrates that equitable access to precision medicine can lead to comparable survival outcomes across racial groups, even with differing tumor biology. The findings advocate for eliminating barriers to genomic testing and fostering inclusivity in cancer research to improve care for all patients.
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