CDKN2B-AS1基因多态性与女性早发冠心病的相关性研究

摘要

目的:探讨CDKN2B-AS1基因位点rs4977574单核苷酸多态性(SNP)与女性早发冠心病的相关性.方法:采用病例对照研究,连续入选女性早发(<65岁发病)冠心病患者226例(病例组)和同期冠状动脉造影阴性、年龄匹配的女性患者79例(对照组),采用小测序法(SNaPshot技术)检测CDKN2B-AS1基因位点rs4977574多态性,同时测定血浆中总胆固醇(TC)、低密度脂蛋白胆固醇(LDL-C)、高密度脂蛋白胆固醇(HDL-C)、甘油三酯(TG)、血尿酸(UA)、空腹血糖(FPG)及糖化血红蛋白(HbA1c)水平,评估rs4977574多态性与上述生物标志物的相关性.结果:与对照组相比,病例组血TG、UA、FPG、HbA1c水平明显升高(P<0.05),校正年龄、体重指数、相关病史及危险因素后,高HbA1c(HbA1c>6.2%)明显增加女性早发冠心病的发生风险(OR=3.35,95%CI:1.41~8.00,P=0.006);rs4977574基因型及等位基因频率在病例组和对照组中分布有显著差异(P<0.05),病例组等位基因G频率明显高于对照组(OR=1.24,95%CI:1.05~1.48,P=0.019).进一步分析发现,rs4977574多态性与高HbA1c相关;与AA基因型受试者相比,(GG+GA)基因型受试者中高HbA1c的发生率明显增加(OR=2.08,95%CI:1.11~3.89,P=0.022).结论:CDKN2B-AS1基因SNP位点rs4977574多态性与女性早发冠心病相关,并与高HbA1c相关.%Objective:To explore the relationship between single nucleotide polymorphism (SNP) rs4977574 in CDKN2B-AS1 gene and female premature coronary artery disease (pCAD) occurrence. Methods: Our research included 2 groups: pCAD group, n=226 consecutive patients≤65 years of age and Control group, n=79 subjects with matched age,without CAD. The genotype of CDKN2B-AS1 SNP rs4977574 was detected by SNaPshot. Blood levels of total cholesterol (TC), low-density lipoprotein cholesterol (LDL-C), high-density lipoprotein cholesterol (HDL-C), triglycerides (TG), uric acid (UA), fasting plasma glucose (FPG) and glycosylated hemoglobin (HbA1c) were examined; relationships between rs4977574 polymorphism and the above parameters were assessed. Results: Compared to Control group, pCAD group had increased blood levels of TG, UA, FPG and HbA1c, P<0.05. With adjusted age, body mass index (BMI), relevant disease history and risk factors, elevated HbA1c (HbA1c>6.2%) obviously increased the risk of female pCAD occurrence (OR=3.35, 95%CI 1.41-8.00, P=0.006). The genotype and allele frequency of rs4977574 were different between pCAD group and Control group, P<0.05. Compared to Control group, pCAD group had the higher frequency of G allele(OR=1.24, 95%CI 1.05-1.48, P=0.019); further analysis found that rs4977574 polymorphism was related to high HbA1c. Compared to AA genotype, GG+GA genotype had the increased incidence of high HbA1c(OR=2.08, 95%CI 1.11-3.89, P=0.022). Conclusion: CDKN2B-AS1 SNP rs4977574 was related to female pCAD occurrence and it was also related to high HbA1c.