Effect of SstI polymorphism of the apolipoprotein CIII gene and environmental factors on risks of hypertriglyceridemia in Taiwan aborigines.
BACKGROUND
Hypertriglyceridemia (HTG) is a heterogeneous metabolic disorder. The aim of this study was to examine associations among genetic polymorphisms, SstI polymorphism of apolipoprotein CIII (ApoCIII) and Hind III polymorphism of lipoprotein lipase (LPL), environmental factors and risks of HTG.


RESULTS
Two hundred and forty-nine southern Taiwanese aborigines were recruited for a cross-sectional study, which included 90 subjects with triglyceride (TG)>150 mg/dl (HTG) and 159 with TG<or=150 mg/dl (NTG). The frequencies of SstI major allele (S1) and minor allele (S2) of ApoCIII were 66.1% and 33.9% in HTG and 73.6% and 26.4% in NTG (p<0.1). In female subjects, the frequencies of the S2 allele was significantly higher in HTG (0.38) than NTG (0.27) (p<0.04). The frequencies of the LPL HindIII major allele (H+) and minor allele (H-) were similar between HTG (H+ 84.3%; H- 15.7%) and NTG (H+ 78.9%; H- 21.1%). In a multivariate adjusted logistic model, education<or=6 year (odds ratio (OR)=3.71, 95% confidence interval (CI): 1.24-8.13), Amis tribe (OR=3.08, 95% CI: 1.41-6.77), body mass index (BMI)>or=25 (OR=2.22, 95% CI: 1.18-4.16), starchy food consumption>or=3 times/week (OR=1.89, 95% CI: 1.00-3.59) and ApoCIII S2S2 genotype (OR=3.35, 95% CI: 1.10-10.19) were independently (p<0.05) associated with HTG risks. Among ApoCIII S1S1, S1S2 and S2S2 genotypes, ApoCIII and TG concentrations increased (p<0.01) in a dose-responsive manner.


CONCLUSIONS
The ApoCIII S2 variant and environmental factors, including education, tribal background, BMI and starchy food intake, modulate the risks of HTG in aboriginal Taiwanese. Interaction between genetic and environmental factors warrants further investigation.
Huang
Meng-Chuan
MC
Department of Public Health, School of Medicine, Kaohsiung Medical University, Chung-Ho Memorial Hospital, Taiwan.
Wang
Tsu-Nai
TN
Liu
Yi-Ling
YL
Pa
Te-Hsiung
TH
Tu
Hung-Ping
HP
Huang
Yi-Chia
YC
Chang
Wen-Tsan
WT
Ko
Ying-Chin
YC
D000368:Aged; D053305:Apolipoprotein C-III; D001056:Apolipoproteins C / Q000235:genetics*; D001114:Areca; D015992:Body Mass Index; D003430:Cross-Sectional Studies; D004040:Dietary Carbohydrates; D004493:Education; D005260:Female; D005787:Gene Frequency / Q000235:genetics; D006801:Humans; D015228:Hypertriglyceridemia / Q000097:blood / Q000453:epidemiology / Q000208:ethnology* / Q000235:genetics*; D008071:Lipoprotein Lipase / Q000235:genetics; D008297:Male; D008875:Middle Aged; D011110:Polymorphism, Genetic; D015995:Prevalence; D012044:Regression Analysis; D012307:Risk Factors; D012907:Smoking; D012931:Social Environment; D013624:Taiwan / Q000453:epidemiology / Q000208:ethnology; D014280:Triglycerides / Q000097:blood
D053305:Apolipoprotein C-III; D001056:Apolipoproteins C; D004040:Dietary Carbohydrates; D014280:Triglycerides; D008071:Lipoprotein Lipase