Adiponectin and adiponectin receptor gene variants in relation to resting metabolic rate, respiratory quotient, and adiposity-related phenotypes in the Quebec Family Study

被引:43
作者
Loos, Ruth J. F.
Ruchat, Stephanie
Rankinen, Tuomo
Tremblay, Angelo
Perusse, Louis
Bouchard, Claude
机构
[1] Pennington Biomed Res Ctr, Human Genom Lab, Baton Rouge, LA 70808 USA
[2] Univ Laval, Dept Social & Prevent Med, Div Kinesiol, Ste Foy, PQ G1K 7P4, Canada
关键词
adiponectin; adiponectin receptor; resting metabolic rate; respiratory quotient; obesity; abdominal obesity; adiposity;
D O I
10.1093/ajcn/85.1.26
中图分类号
R15 [营养卫生、食品卫生]; TS201 [基础科学];
学科分类号
100403 ;
摘要
Background: Despite adiponectin's presumed role in fatty acid oxidation and energy homeostasis, little is known about the effect of gene variants on substrate oxidation, energy expenditure, and adiposity-related phenotypes. Objective: We examined the effects of genetic variation in adiponectin (ADIPOQ) and adiponectin receptors 1 and 2 (ADIPOR1 and ADIPOR2) on resting metabolic rate, respiratory quotient (RQ), and adiposity-related phenotypes. Design: We studied the associations of ADIPOQ, ADIPOR1, and ADIPOR2 polymorphisms with resting metabolic rate, RQ, and body mass index, percentage body fat, sum of 6 skinfold thicknesses, waist circumference, and total, subcutaneous, and visceral fat in 759 participants in the Quebec Family Study. Results: The ADIPOQ 45T -> G single-nucleotide polymorphism (SNP) was significantly (P = 0.0002 to 0.04) associated with overall adiposity and abdominal adiposity; the rare homozygotes (GIG) had a leaner phenotype than did the carriers of the common allele. One SNP each in the putative promoter of ADIPOR1 (ie, -3882T -> C) and ADIPOR2 (ie, IVS1 - 1352G -> A) was associated with RQ (P = 0.03 and 0.04, respectively), and the association was even stronger in nonobese persons (P = 0.02 and 0.003). Carriers of the common alleles (ADIPOR1 T and ADIPOR2 G alleles) had a lower RQ than did the rare homozygotes. A significant genotype-by-genotype interaction (P = 0.0002 to 0.02) was found between SNPs in the promoters of ADIPOQ (-3971A -> G) and ADIPOR1 (-3882T -> C). Subjects carrying the minor ADIPOQ allele (G allele) who were rare homozygotes (CIC) for the ADIPORI SNP had a higher RQ (P = 0.003) and greater overall (P < 0.03) and abdominal (P < 0.05) adiposity than did persons with other genotype combinations. Conclusions: Previous findings that the ADIPOQ 45T -> G variant contributes to overall fatness and abdominal obesity are confirmed. Moreover, variants in the promoter region of both ADIPOR genes contribute to substrate oxidation.
引用
收藏
页码:26 / 34
页数:9
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