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  • Title: Association of sets of alleles of genes encoding beta3-adrenoreceptor, uncoupling protein 1 and lipoprotein lipase with increased risk of metabolic complications in obesity.
    Author: Proenza AM, Poissonnet CM, Ozata M, Ozen S, Guran S, Palou A, Strosberg AD.
    Journal: Int J Obes Relat Metab Disord; 2000 Jan; 24(1):93-100. PubMed ID: 10702757.
    Abstract:
    OBJECTIVE: To investigate the relationship between the polymorphisms of the beta3-AR (Trp64Arg), UCP1 (A-->G) and LPL (HindIII and PvuII) loci and the metabolic complications associated with obesity in a Turkish population. SUBJECTS: 271 unrelated individuals of Turkish origin including obese (body mass index, BMI>30 kg¿m2) and lean (BMI< or =25 kg¿m2) subjects. MEASUREMENTS: Anthropometric (weight, height and blood pressure) and metabolic measurements (plasma levels of glucose, cholesterol and triglycerides), and determination of beta3-AR, UCP1 and LPL genotypes by polymerase chain reaction followed by enzymatic digestion. RESULTS: The distributions of genotypes for each candidate gene (beta3-AR, UCP1 and LPL) were similar between the obese and the lean subjects. The Arg64 allele of the beta3-AR gene was absent from massively obese men. GG carriers of the A-->G variant of the UCP1 gene showed BMI-associated increases of cholesterol levels which were more marked than both AA (P=0.027) and AG (P=0.039) carriers. Obese P+ carriers of the LPL PvuII variant had significantly higher levels of glucose than non-carriers (P=0.011), whereas obese P+P+ carriers did not have significantly different levels of triglycerides than non-carriers (P=0.087). Moreover, carriers of both alleles (G&P+) had higher levels of glucose than non-carriers (P=0.048), but did not have significantly different levels of triglycerides than non-carriers (P=0.125). However, the BMI-associated increase of triglycerides of P+&G carriers was significantly more marked than that of P+ carriers (P=0.0085). CONCLUSION: Our data support the idea that alleles of specific genes (UCP1, LPL and beta3-AR) might play a role in the development of certain metabolic complications of obesity and might have additive effects when combined with each other (as in the case of UCP1 and LPL). International Journal of Obesity (2000)24, 93-100
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