[Relationship between the R219K polymorphism of ATP-binding cassette transporter 1 gene and coronary heart disease]

To study the distribution of R219K polymorphism in ATP-Binding Cassette Transporter 1 (ABCA1) gene in Chinese Han population and the association of this polymorphism with coronary heart disease (CHD) . Genotypes were determined by PCR-RFLP approach in 417 unrelated healthy controls and 396 CHD patients. The frequencies of K allele and KK genotype for controls (0.465, 0.228) were significantly higher than those (0.381, 0.162) for patients (P<0.05). When the patients were divided into two subgroups by onset-age, the frequencies of K allele and KK genotype for early-onset patients (0.34, 0.111) were lower than those (0.419, 0.205) for late-onset patients and those for controls (P<0.05) , while there were no such differences between late-onset patients and controls. Patients with RR genotype had a higher plasma concentration of triglycerides (TG) when compared with that of KK genotype (P<0.05) . No significant differences of plasma high-density lipoprotein cholesterol (HDL-C) level were observed among patients with different genotypes. These data suggest that the R219K polymorphism in ABCA1 gene is correlated with CHD, and the ABCA1 gene KK genotype may has a function against atherosclerosis without detectable change of plasma HDL-C level in Chinese Han population.