Do shorter genes make Black men more likely to get prostate cancer?
Absence of a correlation of androgen receptor gene CAG repeat length and prostate cancer risk in an African-American population.
Not medical advice. For informational purposes only. Always consult a healthcare professional. Terms
Surprising Findings
Longer CAG repeats showed a statistically significant association with higher prostate cancer risk (P = 0.02), contradicting the primary analysis and prior assumptions.
Prior research suggested shorter repeats increase risk — especially in high-incidence populations like African-American men — so finding longer repeats linked to risk flips the script.
Practical Takeaways
Don’t use CAG repeat length as a screening tool for prostate cancer risk in African-American men.
Not medical advice. For informational purposes only. Always consult a healthcare professional. Terms
Surprising Findings
Longer CAG repeats showed a statistically significant association with higher prostate cancer risk (P = 0.02), contradicting the primary analysis and prior assumptions.
Prior research suggested shorter repeats increase risk — especially in high-incidence populations like African-American men — so finding longer repeats linked to risk flips the script.
Practical Takeaways
Don’t use CAG repeat length as a screening tool for prostate cancer risk in African-American men.
Publication
Journal
Clinical prostate cancer
Year
2004
Authors
T. Gilligan, J. Manola, O. Sartor, S. Weinrich, J. Moul, P. Kantoff
Related Content
Claims (4)
In Black men, the number of repeats in a specific gene doesn’t seem to affect whether they get prostate cancer — even if the number is short or long, their risk stays about the same.
Black men with prostate cancer had slightly longer gene repeats than those without it — but the difference was so small it could just be due to chance.
Ethnicity is a significant biological determinant of prostate cancer risk, with men of African descent exhibiting approximately double the incidence and earlier age of onset compared to men of European descent.
One part of the study found that men with longer gene repeats had slightly higher cancer rates — but this might just be a fluke because they tested many different ways and didn’t correct for it.