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Title :A functional SNP upstream of the beta-2 adrenergic receptor gene (ADRB2) is associated with obesity in Oceanic populations
Authors :Naka, I
Hikami, K
Nakayama, K
Koga, M
Nishida, N
Kimura, R
Furusawa, T
Natsuhara, K
Yamauchi, T
Nakazawa, M
Ataka, Y
Ishida, T
Inaoka, T
Iwamoto, S
Matsumura, Y
Ohtsuka, R
Tsuchiya, N
Ohashi, J
Issue Date :11-Dec-2012
Abstract :OBJECTIVE:Obesity is a growing health concern in the Oceanic populations. To investigate the genetic factors associated with adult obesity in the Oceanic populations, the association of single nucleotide polymorphisms (SNPs) of the beta-2 adrenergic receptor (ADRB2) gene with obesity was examined in 694 adults living in Tonga and Solomon Islands. RESULTS:A screening for variation in 16 Oceanic subjects detected 17 SNPs in the entire region of ADRB2, of which nine SNPs including two non-synonymous ones, rs1042713 (Arg16Gly) and rs1042714 (Gln27Glu), were further genotyped for all subjects. The rs34623097-A allele, at a SNP located upstream of ADRB2, showed the strongest association with risk for obesity in a logistic regression analysis adjusted for age, sex, and population (P=5.6 × 10^<−4>, odds ratio [OR]=2.5, 95% confidence interval [CI]=1.5–4.2). The 27Glu was also significantly associated with obesity in the single-point association analysis (P=0.013, OR=2.0, 95%CI=1.2–3.4); however, this association was no longer significant after adjustment for rs34623097 since these SNPs were in linkage disequilibrium with each other. A copy of the obesity-risk allele, rs34623097-A, led to a 1.6 kg/m^2 increase in body mass index (BMI; defined as weight in kilograms divided by height in meters squared) (P=0.0019). A luciferase reporter assay indicated that rs34623097-A reduced the transcriptional activity of the luciferase reporter gene by approximately 10% compared with rs34623097-G. An electrophoretic mobility shift assay demonstrated that rs34623097 modulated the binding affinity with nuclear factors. An evolutionary analysis implies that a G>A mutation at rs34623097 occurred in the Neandertal genome and then the rs34623097-A allele flowed into the ancestors of present-day humans. CONCLUSION:The present results suggest that rs34623097-A, which would lead to lower expression of ADRB2, contributes to the onset of obesity in the Oceanic populations.
URL :https://doi.org/10.1038/ijo.2012.206
Type Local :雑誌掲載論文
ISSN :0307-0565
Publisher :Springer Nature
URI :http://hdl.handle.net/20.500.12000/46966
Citation :International Journal of Obesity Vol.37 no.9 p.1204 -1210
Appears in Collections:Peer-reviewed Journal Articles (Faculty of Medicine)

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