Cancer Center, Howard University, Washington, DC, U.S.A.
Community and Family Medicine, College of Medicine, Howard University, Washington, DC, U.S.A.
Cancer Genomics Proteomics. 2019 Jul-Aug;16(4):245-255. doi: 10.21873/cgp.20129.
BACKGROUND/AIM: Vitamin D receptor (VDR) is present in numerous cellular pathways and it has been suggested that VDR genetic variants influence individual susceptibility to prostate cancer. Also, analyses of single nucleotide polymorphisms (SNPs) in VDR revealed ethnicity-associated polymorphisms. The aim of this study was to identify VDR SNPs in African American men with and without prostate cancer. MATERIALS AND METHODS: The entire VDR gene was screened for germline mutations in a case-control study by denaturing high performance liquid chromatography and DNA sequencing. Logistic regression was used to estimate the association of SNPs, age, family history, and Gleason score with prostate cancer risk. RESULTS: Six SNPs in the non-coding regions, and one SNP in the coding region, were detected. SNP 1 (c.278-69G>A) and SNP 4 (c.907+75C>T) have not been previously reported. SNP 4 had a significant protective effect (β=-0.6, p<0.05); whereas, SNP 7 (rs7975232) showed an increase association with prostate cancer risk and high Gleason score (β=0.32, p<0.05). SNP 4, SNP 7 and age were better predictors of prostate cancer risk than family history with a high degree of sensitivity (74.7%) and specificity (92.4%). CONCLUSION: SNP 4 and SNP 7 could be promising markers for prediction of reduced or increased prostate cancer risk, respectively.
背景/目的:维生素 D 受体 (VDR) 存在于众多细胞途径中,有人认为 VDR 基因变异会影响个体患前列腺癌的易感性。此外,对 VDR 单核苷酸多态性 (SNP) 的分析显示出与种族相关的多态性。本研究旨在鉴定非裔美国男性前列腺癌患者和非前列腺癌患者中的 VDR SNP。 材料与方法:通过变性高效液相色谱和 DNA 测序,在病例对照研究中对整个 VDR 基因进行种系突变筛查。采用 logistic 回归估计 SNP、年龄、家族史和 Gleason 评分与前列腺癌风险的关联。 结果:在非编码区检测到 6 个 SNP,在编码区检测到 1 个 SNP。SNP 1(c.278-69G>A)和 SNP 4(c.907+75C>T)以前尚未报道过。SNP 4 具有显著的保护作用(β=-0.6,p<0.05);而 SNP 7(rs7975232)与前列腺癌风险和高 Gleason 评分增加相关(β=0.32,p<0.05)。SNP 4、SNP 7 和年龄是比家族史更好的前列腺癌风险预测因子,具有较高的敏感性(74.7%)和特异性(92.4%)。 结论:SNP 4 和 SNP 7 分别可能是预测前列腺癌风险降低或增加的有前途的标志物。
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