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Journal of Lipid Research, Vol. 42, 258-264, February 2001
Copyright © 2001 by Lipid Research, Inc.

Original Article

Promoter polymorphisms of hepatic lipase gene influence HDL₂ but not HDL₃ in African American men: CARDIA study

Correspondence to: Kiang Liu, To whom correspondence should be addressed., kiangliu{at}nwu.edu (E-mail)

Hepatic lipase encoded by the hepatic lipase gene (LIPC) is involved in the metabolism of several lipoproteins. Four promoter polymorphisms in LIPC have been found to be in complete disequilibrium and associated with high density lipoprotein cholesterol (HDL-C) and apolipoprotein (apo)A-I levels in both white and black populations. We investigated the association between the promoter polymorphism and lipid profiles as well as anthropometric phenotypes in African American men in the Coronary Artery Risk Development in Young Adults study. We performed serial cross-sectional analyses and longitudinal analyses of lipids from 578 subjects in five examinations over 10 years of follow-up. Results showed that the allele frequency (0.52) in our black population was consistent with that reported in black subjects but much higher than that reported (~0.2) in white populations. Analysis of covariance tests of the three genotypic means in each examination showed that the P values ranged from 0.01 to 0.08 for HDL-C (except P = 0.54 in the fourth examination), from 0.006 to 0.01 for HDL₂-C, and from 0.06 to 0.07 for apoA-I. Mean HDL₃-C levels were essentially identical among the three genotypes. Total cholesterol, low density lipoprotein cholesterol (LDL-C), triglycerides, and apoB, which are mainly involved in the very low density lipoprotein-LDL pathway, were not significantly different according to the promoter polymorphism, except for triglycerides in the third examination (P = 0.01). No significant association was found between anthropometric phenotypes and the LIPC polymorphism in any of five examinations. The change of the anthropometric variables was not significantly associated with genotypes.

In conclusion, our results indicated that the LIPC promoter polymorphism has exclusive effects on HDL₂-C but not HDL₃-C levels. — Juo, S-H. H., Z. Han, J. D. Smith, L. Colangelo, and K. Liu. Promoter polymorphisms of hepatic lipase gene influence HDL₂ but not HDL₃ in African American men: CARDIA study. J. Lipid Res. 2001. 42: 258;–264.

Supplementary key words: high density lipoprotein, association study, gene

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