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Address correspondence to Li-Yu Tsai, Ph.D., Department of Clinical Chemistry, School of Technology for Medical Sciences, Kaohsiung Medical University, No. 100 Shi-Chuan 1st Road, San Ming District, Kaohsiung, Taiwan; tel 886 7 312 1101 ext 7262; fax 886 7 237 0544; e-mail tsliyu{at}kmu.edu.tw.
Apolipoprotein E (apoE, protein; APOE, gene) plays a major role in lipoprotein metabolism and lipid transport. Many investigators have described associations between apoE genotypes, coronary artery disease (CAD), and other risk factors. The aim of this study was to investigate the association between apoE genotypes and serum lipid profiles in a healthy population of 220 volunteers at Kaohsiung in Taiwan. Other CAD risk factors such as serum levels of apolipoprotein A-I (apoA-I), apolipoprotein B (apoB), homocysteine (Hcy), folate, and vitamin B12 were also measured. ApoE genotypes were determined by polymerase chain reaction-restriction fragment length polymorphism (PCR-RFLP). In the study population, the frequency of apoE allele
3 was greatest (85.2%); the frequency of
2 was 8.4%; and that of
4 was 6.4%. The serum apoA-1/apoB ratio showed significant difference among the 3 apoE genotype groups (p .0001); the apoA-1/apoB ratio was 1.9 ± 0.1 (mean ± SD) in the
2 group, vs 1.4 ± 0.04 and 1.5 ± 0.12 in the
3 and
4 groups, respectively. No significant associations were found between APOE alleles and the serum levels of the various lipids or other CHD risk factors.
Keywords: apolipoproteins E, A-I, B, polymerase chain reaction-restriction fragment length polymorphism
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