Association of ADRB1 and UCP3 gene polymorphisms with insulin sensitivity but not obesity.
BACKGROUND
The uncoupling proteins (UCPs) and beta-adrenoceptors (ADRBs) are important for energy balance and may be involved in the pathogenesis of insulin resistance. Obesity is strongly hunted by insulin resistance and susceptibility genes for the two conditions could be separate or common. Variations within the UCPs and ADRBs genes may give important clues to their involvement in disease.


METHODS
A total of four single nucleotide polymorphisms (SNPs) in the genes UCP1, UCP2, UCP3, and ADRB1 were examined for association with obesity and insulin sensitivity (HOMA(IR)) in obese (n = 292) and healthy non-obese (n = 481) females.


RESULTS
None of the SNPs was associated with obesity status or body mass index. However, ADRB1 (rs1801253) was nominally associated with serum insulin (nominal p = 0.034) and HOMA(IR) (nominal p = 0.022). UCP3 (rs1800006) was in post-hoc analysis nominally associated with serum insulin and HOMA(IR) (nominal p = 0.013 and 0.048, respectively). UCP1 and UCP2 showed no association with insulin sensitivity.


CONCLUSIONS
Polymorphisms in ADRB1 and UCP3 may contribute to insulin resistance rather than obesity among Swedish women.
Mottagui-Tabar
Salim
S
Department of Molecular Medicine, National Public Health Institute, University of Helsinki, Biomedicum, Helsinki, Finland.
Hoffstedt
Johan
J
Brookes
Anthony J
AJ
Jiao
Hong
H
Arner
Peter
P
Dahlman
Ingrid
I
D015992:Body Mass Index; D005260:Female; D020022:Genetic Predisposition to Disease; D005838:Genotype; D006801:Humans; D007333:Insulin Resistance / Q000235:genetics*; D007473:Ion Channels / Q000235:genetics*; D024101:Mitochondrial Proteins / Q000235:genetics*; D009765:Obesity / Q000235:genetics*; D010641:Phenotype; D020641:Polymorphism, Single Nucleotide; D018342:Receptors, Adrenergic, beta-1 / Q000235:genetics*; D000071256:Uncoupling Protein 1; D000071246:Uncoupling Protein 2; D000071247:Uncoupling Protein 3
D007473:Ion Channels; D024101:Mitochondrial Proteins; D018342:Receptors, Adrenergic, beta-1; C000604371:UCP1 protein, human; C000604389:UCP2 protein, human; C000604392:UCP3 protein, human; D000071256:Uncoupling Protein 1; D000071246:Uncoupling Protein 2; D000071247:Uncoupling Protein 3