title: Common STAT3 variants are not associated with obesity or insulin resistance in female twins.
abstract: In animal models, STAT3 action in the hypothalamus and liver appears essential for normal body weight and glucose homeostasis in response to insulin. We hypothesized that variation in the STAT3 gene may be associated with body fat and/or insulin resistance in the general population. Five tagging SNPs spanning the STAT3 gene, rs8074524, rs2293152, rs2306580, rs6503695, and rs7211777 were genotyped in 2776 white female twins (mean age, 47.4+/-12.5 yrs) from the St Thomas' United Kingdom Adult Twin Registry (Twins UK). Minor allele frequencies were as follows: rs8074524 (0.19), rs2293152 (0.37), rs2306580 (0.06), rs6503695 (0.35), and rs7211777 (0.34). The minor allele of rs2293152 was associated with higher homeostasis model assessment index of insulin resistance (p=0.013) in the full cohort and confirmed in sib-transmission/disequilibrium test (TDT): (p=0.015; n=60). However, there were no associations with fasting serum insulin or glucose or with obesity variables. Although defective STAT3 action results in obesity and insulin resistance in animal models, we failed to establish any indicative associations with common SNPs in this human study.
authors.affiliation: Nutrition Food and Health Research Centre, King's College London, Franklin-Wilkins Building, 150 Stamford Street, London SE1 9NH, United Kingdom.
authors.forename: Yalda
authors.initials: Y
authors.lastname: Jamshidi
authors.forename: Theodosios
authors.initials: T
authors.lastname: Kyriakou
authors.forename: Sakina B
authors.initials: SB
authors.lastname: Gooljar
authors.forename: Laura J
authors.initials: LJ
authors.lastname: Collins
authors.forename: Carl A
authors.initials: CA
authors.lastname: Lane
authors.forename: Harold
authors.initials: H
authors.lastname: Snieder
authors.forename: Xiaoling
authors.initials: X
authors.lastname: Wang
authors.forename: Tim D
authors.initials: TD
authors.lastname: Spector
authors.forename: Sandra D
authors.initials: SD
authors.lastname: O'Dell
mesh_terms: D000328:Adult; D005260:Female; D014644:Genetic Variation; D006801:Humans; D007333:Insulin Resistance / Q000235:genetics*; D008875:Middle Aged; D009765:Obesity / Q000235:genetics*; D020641:Polymorphism, Single Nucleotide; D050796:STAT3 Transcription Factor / Q000235:genetics*; D006113:United Kingdom
chemical_list: D050796:STAT3 Transcription Factor; C494086:STAT3 protein, human