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Novel P143L polymorphism of the LCAT gene is associatedwith dyslipidemia in Chinese patients who have coronary atherosclerotic heart disease
Biochemical and Biophysical Research Communications 318(2004)4-10,-0001,():
Coronary atherosclerotic heart disease (CAD) is a multifactorial disorder resulting from numerous gene–gene and gene–environment interactions. Lecithin:cholesterol acyltransferase (LCAT), a key enzyme in reverse cholesterol transport and the metabolism of high-density lipoprotein (HDL), is thought to be a candidate gene related to dyslipidemia and CAD. Variations in the LCAT gene were investigated in 190 CAD patients and 209 age-and gender-matched controls by denaturing high-performance liquid chromatography, and confirmed by sequencing and RFLP assay. In CAD patients, a novel single-nucleotide polymorphism (P143L) in exon 4 of the LCAT gene was discovered in nine males and two females (frequency of 5.79%), which was found in none of 209 controls. The genotype and allele distribution of P143L is significantly (P<0:04) higher in the low HDL-C subgroup than in the normal HDL-C subgroup in both male patients and all CAD patients. P143L was also found to be significantly (P < 0:01) associated with the low HDL-C phenotype in both male patients and all CAD patients, with odds-ratios of 7.003 (95% CI 2.243–21.859) and 5.754 (95% CI 1.893–13.785), respectively. Thus, the P143L polymorphism may play a role in causing decreased HDL-C levels, leading to increased risk of dyslipidemia and CAD in Chinese.
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