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Cancer Epidemiology, Biomarkers & Prevention
Cancer Epidemiology, Biomarkers & Prevention
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A polymorphism of the 5 alpha-reductase gene and its association with prostate cancer: a case-control analysis.

P W Kantoff, P G Febbo, E Giovannucci, K Krithivas, D M Dahl, G Chang, C H Hennekens, M Brown and M J Stampfer
P W Kantoff
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P G Febbo
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E Giovannucci
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K Krithivas
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D M Dahl
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G Chang
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C H Hennekens
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M Brown
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M J Stampfer
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DOI:  Published March 1997
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Abstract

Prostate cancer (CaP) is the most commonly diagnosed, nondermatological cancer in the United States. The development and progression of CaP is influenced by androgens. 5 alpha-Reductase, type II, converts testosterone to dihydrotestosterone and is critical to the development of the prostate. A TA dinucleotide repeat polymorphism exists in the 3' untranslated region of the 5 alpha-reductase type II gene. 5 alpha-Reductase alleles with longer TA repeats are more common in African-Americans, the group with the highest incidence of CaP. It has been hypothesized that the longer TA repeat alleles might be associated with increased risk of CaP. We studied this potential association within the Physician's Health Study, a predominantly Caucasian cohort study. Using PCR we identified the TA genotype in 590 men with CaP and 802 age-matched controls. The frequency of each allele in the controls was TA(0), 0.87, TA(9), 0.13, and TA(18), 0.01. Homozygotes for the longer TA alleles, TA(9) and TA(18), were underrepresented among cases with an odds ratio of 0.47 (confidence interval, 0.20-1.12), but this was not statistically significant (P = 0.08, two tailed). Our analysis does not support the prior hypothesis that longer TA alleles confer an increased risk of CaP in a predominantly Caucasian population; in fact, longer TA alleles are more prevalent in men without CaP.

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March 1997
Volume 6, Issue 3
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A polymorphism of the 5 alpha-reductase gene and its association with prostate cancer: a case-control analysis.
P W Kantoff, P G Febbo, E Giovannucci, K Krithivas, D M Dahl, G Chang, C H Hennekens, M Brown and M J Stampfer
Cancer Epidemiol Biomarkers Prev March 1 1997 (6) (3) 189-192;

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A polymorphism of the 5 alpha-reductase gene and its association with prostate cancer: a case-control analysis.
P W Kantoff, P G Febbo, E Giovannucci, K Krithivas, D M Dahl, G Chang, C H Hennekens, M Brown and M J Stampfer
Cancer Epidemiol Biomarkers Prev March 1 1997 (6) (3) 189-192;
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