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  • Title: Androgen receptor and vitamin D receptor gene polymorphisms and prostate cancer risk.
    Author: Andersson P, Varenhorst E, Söderkvist P.
    Journal: Eur J Cancer; 2006 Nov; 42(16):2833-7. PubMed ID: 17010601.
    Abstract:
    We study the CAG repeat region in exon 1 of the androgen receptor (AR) and the TaqI polymorphism in exon 9 of the vitamin D receptor (VDR) and the association with prostate cancer. 137 incidentally discovered, histologically verified prostate cancers were analysed for CAG repeat length in AR and genotype at the TaqI site of the VDR. 124 control subjects were analysed to determine the CAG repeat length and TaqI genotype determined for 176 control subjects. An unpaired t-test shows that the mean CAG repeat length was significantly (p<0.001) shorter among cases (20.1 repeats) compared with controls (22.5 repeats). Dividing the prostate cohort and controls into tertiles (< or = 19, 20-22, > or = 23 repeats) shows that short repeats are significantly more common among cases (odds ratio (OR) 4.45, p=0.00003). Genotype frequencies for the TaqI polymorphism reveals no significant differences between cases and controls. We conclude that men with a short CAG repeat in the androgen receptor gene have an increased risk of developing prostate cancer.
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