细胞周期蛋白D1基因A870G多态与前列腺癌遗传易感性的相关性研究

目的 探讨细胞周期蛋白D1(CCND1)基因A870G多态与中国人群前列腺癌(PCa)遗传易感性的关系.方法 采用TaqMan-MGB实时荧光定量PCR法,检测245例PCa与245名非前列腺癌个体对照的CCND1 A870G基因型分布及差异.结果 PCa组和对照组870G等位基因频率分别为47.6%(233/490)和40.8%(200/490),G的PCa发病风险是A的1.31倍(95%CI为1.00～1.72,P=0.054).与AA纯合子相比,AG杂合子的PCa风险增至1.43倍(95%CI为0.89～2.31,P=0.142),而GG纯合子的PCa风险显著增至2.02倍(95%CI为1.07～3.80,P=0.029).将AA、AG和GG视为不同的等级,经趋势Armitage检验,存在等位基因剂量-反应关系(P=0.029).PCa者中,有转移者携带G等位基因(AG、GG基因型)的比例高于无转移者(P=0.014).结论 CCND1 870G增加PCa发病风险,并呈等位基因剂量-反应关系,GG基因型是中国人的PCa遗传易感因素;G等位基因携带可能与Pca转移有关.

CCND1 gene A870G polymorphism and genetic susceptibility to prostate cancer

Objective To investigate the possible association between the CCND1 A870G polymorphism and susceptibility to prostate cancer(PCa)in a Chinese population.Methods The CCND1 A870G genotypes were determined by TaqMan assays in 245 PCa cases and age-matched 245 controis.Odds ratios(OR)for PCa and 95%confidence intervals(CI)from unconditional logistic regression models were used to evaluate relative risks.Age,a potential PCa risk factor,was included in the logistic regression models as a covariate in the multivariate analyses on genotype and PCa risk.Results The frequencies for G and A alleles were 0.476,0.524 in PCa cases,and 0.408 and 0.592 in controls,respectively.The G allele was marginally significantly associated with the presence of PCa (P=0.054)and had an increased risk for PCa(OR=1.31,95%CI=1.00-1.72)as compared to theA allele.Compared to AA homozygote,AG heterozygote had a 1.43-fold increased risk(95%CI=0.89-2.31,P=0.142),whereas GG homozygote had a significantly higher 2.02-fold increased risk (95%CI=1.07-3.80,P=0.029)of PCa(Armitage's trend test,P=0.029).The G allele(AG or GG genotype)was more frequently found in PCa patients with metastasis than those without metastasis(P=0.014).Conclusion The G allele of CCND1 A870G is associated with the presence of PCa and GG homozygote is potentially one of the genetic risk factors for PCa in Chinese population.The G allele may be associated with the progression of PCa metastasis.