title: Genetic variation at the adiponectin locus and risk of type 2 diabetes in women.
abstract: Previous data suggesting that polymorphisms in the adiponectin gene were associated with insulin resistance or type 2 diabetes have been inconsistent. We assessed the relationship between five common haplotype-tagging single nucleotide polymorphisms (SNPs) in the adiponectin gene (-11365C>G, -4034A>C, -3964A>G, +45T>G, and +276G>T), haplotypes defined by these SNPs, and the risk of type 2 diabetes by conducting a nested case-control study of 642 incident cases of type 2 diabetes and 995 matching control subjects in the Nurses' Health Study. Overall, we did not observe significant differences in genotype or allele frequencies for the five SNPs between the case and control subjects. After adjustment for diabetes risk factors, the -4034 C/C genotype was associated with a reduced risk of diabetes (odds ratio [OR] compared with the A/A genotype = 0.70, 95% CI 0.50-0.99, P = 0.04). In subgroup analyses, the +276 genotype was significantly associated with diabetes risk only among subjects with peroxisome proliferator-activated receptor-gamma (PPAR gamma) variant 12Ala allele (OR comparing +276 T alleles with the G/G genotype = 1.69, 1.04-2.75, P = 0.035) or among obese subjects (1.46, 1.03-2.08, P = 0.03). These data suggest a potential interaction between the adiponectin genotype and PPAR gamma genotype or obesity, but these analyses should be considered exploratory and require further investigation in larger studies.
authors.affiliation: Department of Nutrition, Harvard School of Public Health, Boston, Massachusetts 02115, USA. frank.hu@channing.harvard.edu
authors.forename: Frank B
authors.initials: FB
authors.lastname: Hu
authors.forename: Alessandro
authors.initials: A
authors.lastname: Doria
authors.forename: Tricia
authors.initials: T
authors.lastname: Li
authors.forename: James B
authors.initials: JB
authors.lastname: Meigs
authors.forename: Simin
authors.initials: S
authors.lastname: Liu
authors.forename: Asli
authors.initials: A
authors.lastname: Memisoglu
authors.forename: David
authors.initials: D
authors.lastname: Hunter
authors.forename: JoAnn E
authors.initials: JE
authors.lastname: Manson
mesh_terms: D052242:Adiponectin; D000428:Alcohol Drinking; D015992:Body Mass Index; D016022:Case-Control Studies; D003924:Diabetes Mellitus, Type 2 / Q000453:epidemiology / Q000235:genetics*; D005260:Female; D014644:Genetic Variation; D005838:Genotype; D006801:Humans; D036341:Intercellular Signaling Peptides and Proteins; D008875:Middle Aged; D009765:Obesity / Q000235:genetics; D020641:Polymorphism, Single Nucleotide; D011506:Proteins / Q000235:genetics*; D018160:Receptors, Cytoplasmic and Nuclear / Q000235:genetics; D012307:Risk Factors; D012907:Smoking; D014157:Transcription Factors / Q000235:genetics
chemical_list: D052242:Adiponectin; D036341:Intercellular Signaling Peptides and Proteins; D011506:Proteins; D018160:Receptors, Cytoplasmic and Nuclear; D014157:Transcription Factors