胆固醇酯转运蛋白-TaqIB基因多态性与冠心病的相关研究

目的 探讨胆固醇酯转运蛋白(CETP)-TaqIB基因多态性与冠心病的相关性.方法 采用聚合酶链反应.限制片长多态性分析方法 对238例冠心病患者(冠心病组)和203例非冠心病者(对照组)进行检测.结果 所有受试者中CETP-TaqIB等位基因B1、B2的分布频率分别为59.4%(262/441)和40.6%(179/441).冠心病组B1B1基因型频率高于对照组[39.9%(95/238)比29.6%(60/203),JP<0.05],而B1B2基因型频率低于对照组[44.1%(105/238)比53.7%(109/203),P<0.05].B1B1基因型高密度脂蛋白胆固醇(HDL-C)水平及载脂蛋白(apo)A I水平显著低于B282基因型[(1.19±0.36)mmol/L比(1.38±0.39)mmol/L,(1.17±0.33)g/L比(1.30±0.31)g,L,P<0.05].在57例行冠状动脉造影的冠心病患者中,B1纯合子冠状动脉狭窄程度显著高于等位基因B2携带者(P<0.05).多因素Logistic回归结果 显示B1B1基因型作为独立危险因素未达到有统计学意义(P=0.147).结论 CETP-TaqIB基因多态性可影响脂蛋白水平,B1B1基因型与低HDL-C、低apo A I水平有密切关系.CETP-TaqIB基因型与冠状动脉狭窄程度相关,但作为冠心病的独立危险因素未能证实.

Association between cholesteryl ester transfer protein-TaqIB polymorphism and coronary heart disease

Objective To determine the frequency of the cholesteryl ester transfer protein (CETP)-TaqIB polymorphism and investigate its relationship with plasma lipid levels and coronary hert disease(CHD). Methods Two hundred and thirty-eight patients with CHD (CHD group) and 203 age-matched controls( control group) were selected, the CETp-TaqIB mutation was detected by restriction fragment length polymorphism of the CETP gene. Results In the total subjects, the frequency of B1 and B2 alleles were 59.4%(262/441 ) and 40.6%( 179/441 ) respectively. Compared with that in control group, the frequency of CETP genotype BIBI was higher in CHD group [39.9%(95/238) vs 29.6% ( 60/203 ), P<0.05], and the frequency of B1B2 was lower in CHD group [44.1%(105/238) vs 53.7%(109/203), P< 0.05]. Compared with that in the B2 homozygotes, high density lipoprotein cholesterol (HDL-C) and apolipoprotein (apo)A I level were significantly lower in the B1 homozygotes [(1.19±0.36) mmol/L vs (1.38±0.39) retool/L,( 1.17±0.33 ) g/L vs ( 1.30±0.31 ) g/L, P<0.05]. The B 1 homozygotes was associated with higher degree of cononary stenosis than the B2 carriers (P<0.05 ). There was no significant association between CETP-TaqIB genotype and the risk of CHD (P=0.147). Conclusions CETP-TaqIB polymorphism affects the concentrations of lipaproteins. There are significant associations between the B1 homozygotes and lowerHDL-C and apo A I levels. The B1 allele is not an independent risk factor for CHD.