A haplotype at the adiponectin locus is associated with obesity and other features of the insulin resistance syndrome

Claudia Menzaghi, Tonino Ercolino, Rosa Di Paola, Anders H. Berg, James H. Warram, Philipp E. Scherer, Vincenzo Trischitta, Alessandro Doria

Research output: Contribution to journalArticle

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Abstract

Adiponectin is a protein secreted by adipocytes that modulates insulin action. To assess whether variants of this gene contribute to the prevalence of insulin resistance in Caucasians, we genotyped 413 nondiabetic individuals for two single nucleotide polymorphisms (SNPs) at this locus. The two SNPs (45T→G and 276G→T) were chosen because of their association with type 2 diabetes in Japanese. Whereas each polymorphism was significantly associated with some correlate of insulin resistance, the haplotype defined by the two together was strongly associated with many components of the insulin resistance syndrome. Homozygotes for the risk haplotype had higher body weight (P = 0.03), waist circumference (P = 0.004), systolic (P = 0.01) and diastolic (P = 0.003) blood pressure, fasting glucose (P = 0.02) and insulin (P = 0.005) levels, homeostasis model assessment (HOMA) for insulin resistance (P = 0.003), and total to HDL cholesterol ratio (P = 0.01). Homozygotes also had significantly lower plasma levels of adiponectin (P = 0.03), independent of sex, age, and body weight. In an independent study group of 614 Caucasians, including 310 with type 2 diabetes, the risk haplotype was confirmed to be associated with increased body weight (P = 0.03) but not with type 2 diabetes per se. We conclude that variability at the adiponectin locus is associated with obesity and other features of the insulin resistance syndrome, but given the nature of the two SNPs, the risk haplotype is most probably a marker in linkage disequilibrium with an as yet unidentified polymorphism that affects plasma adiponectin levels and insulin sensitivity.

Original languageEnglish (US)
Pages (from-to)2306-2312
Number of pages7
JournalDiabetes
Volume51
Issue number7
StatePublished - 2002

Fingerprint

Adiponectin
Haplotypes
Insulin Resistance
Obesity
Type 2 Diabetes Mellitus
Single Nucleotide Polymorphism
Body Weight
Homozygote
Insulin
Linkage Disequilibrium
Waist Circumference
Adipocytes
HDL Cholesterol
Fasting
Homeostasis
Blood Pressure
Glucose
Genes
Proteins

ASJC Scopus subject areas

  • Internal Medicine
  • Endocrinology, Diabetes and Metabolism

Cite this

Menzaghi, C., Ercolino, T., Paola, R. D., Berg, A. H., Warram, J. H., Scherer, P. E., ... Doria, A. (2002). A haplotype at the adiponectin locus is associated with obesity and other features of the insulin resistance syndrome. Diabetes, 51(7), 2306-2312.

A haplotype at the adiponectin locus is associated with obesity and other features of the insulin resistance syndrome. / Menzaghi, Claudia; Ercolino, Tonino; Paola, Rosa Di; Berg, Anders H.; Warram, James H.; Scherer, Philipp E.; Trischitta, Vincenzo; Doria, Alessandro.

In: Diabetes, Vol. 51, No. 7, 2002, p. 2306-2312.

Research output: Contribution to journalArticle

Menzaghi, C, Ercolino, T, Paola, RD, Berg, AH, Warram, JH, Scherer, PE, Trischitta, V & Doria, A 2002, 'A haplotype at the adiponectin locus is associated with obesity and other features of the insulin resistance syndrome', Diabetes, vol. 51, no. 7, pp. 2306-2312.
Menzaghi, Claudia ; Ercolino, Tonino ; Paola, Rosa Di ; Berg, Anders H. ; Warram, James H. ; Scherer, Philipp E. ; Trischitta, Vincenzo ; Doria, Alessandro. / A haplotype at the adiponectin locus is associated with obesity and other features of the insulin resistance syndrome. In: Diabetes. 2002 ; Vol. 51, No. 7. pp. 2306-2312.
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