Association between polymorphisms in the APOB gene and hyperlipidemia in the Chinese Yugur population

We investigated the influence of apolipoprotein B gene (APOB) variants on the risk of hyperlipidemia (HL) in 631 middle-aged and elderly members of the Chinese Yugur population (HL, n=336; normolipidemia, n=295). APOB polymorphisms were identified using mass spectrometry, and five single nucleotide polymorphisms (rs1042034, rs2163204, rs512535, rs676210, and rs679899) and serum lipids were further analyzed. rs1042034 and rs676210 were significantly associated with HL (P<0.05). Compared with the GG or AA genotype, individuals with AG and AG+AA in rs1042034 and with AG and AG+GG in rs676210 had a 1.67-fold (95%CI=1.20-2.33),1.63-fold (95%CI=1.19-2.24), 1.72-fold (95%CI=1.24-2.40), and 1.67-fold (95%CI=1.21-2.291) increased risk of high HL, respectively. rs2163204 was in strong linkage disequilibrium with rs1042034, rs676210, and rs679899, and strong disequilibrium was observed between rs1042034 and rs676210 (D′>0.9). Compared with the GTGAA haplotype, haplotypes ATGGA and ATAGG were more strongly associated with HL [odds ratio (OR)=1.46, 95%CI=0.02-2.11; OR=1.63, 95%CI=1.03-2.60, respectively]. The risk factors age (P=0.008), body mass index (P<0.0001), GA+GG genotype in rs676210 (P=0.009), and alcohol consumption (P=0.056) contributed strongly to HL development. The A allele of rs1042034 and the G allele of rs676210 may thus predispose middle-aged and elderly members of the Chinese Yugur population to HL in combination with other genetic or nutritional factors, and could be used as new genetic markers for HL screening.

Relationship of Xba1 and EcoR1 polymorphisms of apolipoprotein-B gene to dyslipidemia and obesity in Asian Indians in North India.

BACKGROUND: Genetic investigation of dyslipidemia and obesity prevalent in the Indian population form the basis of this study. METHODS AND RESULTS: The frequency of restriction fragment length polymorphisms (Xba1 and EcoR1) of the apolipoprotein-B gene was investigated in a case-control study of 30 hyperlipidemic and 40 normolipidemic subjects. By univariate analysis, old age, higher body mass index, waist-hip ratio and sum of four skinfolds were found to be significantly associated with hyperlipidemia. The frequencies of X- and E+ alleles of the apolipoprotein-B gene were significantly higher in North Indians in the state of New Delhi (0.83 and 0.91, respectively) as compared to the observations made in Caucasians in previous studies, but was similar to the frequency reported in Indians settled in Singapore and the UK. There were no significant differences in the allele or genotype frequencies of either Xba1 or EcoR1 polymorphisms between the hyperlipidemic and normolipidemic groups. On multiple logistic regression analysis considering body mass index, waist-hip ratio, percentage body fat and genotypes as independent variables, no association was observed between the apolipoprotein-B genotypes and serum lipid components. Further, there were no associations between apolipoprotein-B polymorphisms and generalized obesity (as assessed by body mass index, sum of four skinfolds, and percentage total body fat) and abdominal obesity (as measured by waist circumference and waist-hip ratio). CONCLUSIONS: We conclude that apolipoprotein-B (Xba1 and EcoR1) polymorphisms do not appear to influence serum lipid levels and parameters of generalized andregional obesity in the study sample.

Prevalencia de obesidad, hipertensión arterial y dislipidemia en grupos aborígenes rurales de Chile / Prevalence of obesity, hypertension and serum lipid profiles in chilean rural aboriginal communities

Background: Chilean aboriginal ethnic groups (mapuche and aymaras) have a very low prevalence rate of type 2 diabetes. The investigation of a possible relationship between this low prevalence of diabetes and obesity, hypertension and serum lipid profiles in both groups is worthwhile. Aim: To study the prevalence of obesity, hypertension and lipid profile in two chilean aboriginal communities. Subjects and Methods: The prevalence of obesity, hypertension, fasting serum total cholesterol, HDL cholesterol, triglycerides, glucose, insulin, leptin and oral glucose tolerance test were measured in 345 mapuche (106 male) and 247 aymara (100 male) individuals. Results: Sixty three percent of mapuche women, 37.9 percent of mapuche men, 39.7 percent of the aymara women and 27.0 percent of aymara men had a body mass index over 27 kg/m2. Twenty percent of mapuche men, 18.0 percent of mapuche women, 9.0 percent of aymara men and 4.8 percent of the aymara women had high blood pressure values. Serum HDL cholesterol was below 35 mg/dl in 16 percent of mapuche women, 14 percent of mapuche men, 25 percent of the aymara women and 27 percent of aymara men. No differences in total cholesterol levels were observed between mapuches and aymaras. Conclusion: Mapuche women have higher prevalence of obesity and high blood pressure than aymara women. Low serum HDL cholesterol has a higher prevalence among aymara individuals

Influencia de la etnia y el ambiente sobre el perfil lipídico en escolares de la VIII región / Influence of ethnic and environment on lipidic profile in school children of the VIII region

We studied fasting total, HDL cholesterol and tryglicerides in 329 children aged from 6 to 15 years. One hundred and ten lived in Concepcion and were considered urban. Two hundred nineteen lived in Alto Bio-Bio and were considered rural; of these 173 had a pehuenche aboriginal origin. Rural non pehuenche and urban children had a total cholesterol of 123.7 ñ 23, 133.7 ñ 25.8 and 153.7 ñ 29.7 mg/dl respectively, a HD cholesterol of 39.2 ñ 9.1, 38.8 ñ 9.1 and 46.2 ñ 11.3 mg/dl respectively and triglycerides of 83.3 ñ 33.5, 96.7 ñ 33.5 and 81.9 ñ 33.3 mg/dl respectively. Lipid levels were above safe values in 2.9 per cent of pehuenche, 8.7 per cent non pehuenche rural and 13.6 per cent or urban children. It is concluded that the higher lipid levels of urban and non pehuenche children supports the favorable effect of rural environment and pehuenche ethnic origin on cardiovascular risk factors