Background: Cyclin D1 is a key protein involved in cell cycle regulation. A common A870G single nucleotide polymorphism in exon 4 of the cyclin D1 gene (CCND1) has an effect on the transcription of two different cyclin D1 mRNAs. Association of the genetic polymorphism of A870G of CCND1 with several cancer risks has been reported.
Materials And Methods: We performed a case-control study consisting of 99 familial prostate cancer cases and 115 noncancer controls to examine the genotypic frequency of the CCND1 polymorphism.
Results: We did not observe a significant association of the genotypic frequency of CCND1 with overall cases and controls. However, the AA genotype of CCND1 showed a tendency to increase prostate cancer risk in subjects aged 70 years or older (odds ratio [OR] = 2.14, 95% confidence interval [CI] = 0.86-5.27, p = 0.096). Stratification of cases according to clinical stages showed that the AA genotype was significantly frequently observed in metastatic cancer in comparison with GG + AG genotypes (OR = 3.03, 95% CI = 1.11-8.23, p = 0.026).
Conclusion: The present study suggested that the genetic polymorphism might be associated with familial prostate cancer risk in a Japanese population.
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