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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. 
 
Key words: 
Coronary disease; Cholesterol ester transfer proteins; Polymorphism; Lipoproteins