RGD Reference Report - Association of polymorphisms in the interleukin 6 receptor complex with obesity and hyperandrogenism. - Rat Genome Database

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Association of polymorphisms in the interleukin 6 receptor complex with obesity and hyperandrogenism.

Authors: Escobar-Morreale, HF  Calvo, RM  Villuendas, G  Sancho, J  San Millan, JL 
Citation: Escobar-Morreale HF, etal., Obes Res. 2003 Aug;11(8):987-96.
RGD ID: 1625428
Pubmed: PMID:12917504   (View Abstract at PubMed)
DOI: DOI:10.1038/oby.2003.136   (Journal Full-text)

OBJECTIVE: Interleukin-6 (IL-6), is an inflammatory cytokine that may influence the pathogenesis of obesity and hyperandrogenism. IL-6 exerts its actions through a heterodimeric receptor consisting of two membrane-bound glycoproteins: an 80-kDa IL-6 binding unit (IL6R-alpha) and a 130-kDa IL-6 signal transducer (gp130). Genetic variability at these loci might contribute to explain the development of obesity and hyperandrogenism. RESEARCH METHODS AND PROCEDURES: We have evaluated the possible association of several polymorphisms in the IL6R-alpha and gp130 genes with obesity and/or hyperandrogenism in a case-control study involving 143 hyperandrogenic patients and 45 healthy women from Spain. RESULTS: A microsatellite CA-repeat polymorphism in the IL6R-alpha locus was associated with obesity. The frequency of the common 149-bp allele was markedly increased in obese women compared with controls when considering patients and controls as a whole (0.41 vs. 0.29, chi(2) = 17.085, p < 0.050). On the other hand, the uncommon Arg148 allele of the Gly148Arg polymorphism in the gp130 gene was more frequent in controls compared with hyperandrogenic patients (0.17 vs. 0.08, chi(2) = 5.605, p = 0.026). Controls carrying Arg148 alleles had lower 11-deoxycortisol and 17-hydroxyprogesterone concentrations, a lower response of androstenedione to 1-24 adrenocorticotropin, and an almost significant decrease in free testosterone levels, suggesting that Arg148 alleles in the gp130 gene have a protective effect against androgen excess and adrenal hyperactivity. DISCUSSION: Polymorphisms in the gp130 and IL6R-alpha loci influence hyperandrogenism and obesity, respectively. Our present results further suggest that proinflammatory genotypes are involved in the pathogenesis of these common metabolic disorders.



RGD Manual Disease Annotations    Click to see Annotation Detail View

  
Object SymbolSpeciesTermQualifierEvidenceWithNotesSourceOriginal Reference(s)
IL6STHumanhyperandrogenism resistanceIAGP DNA:polymorphism:cds:p148G>RRGD 
Il6stRathyperandrogenism resistanceISOIL6ST (Homo sapiens)DNA:polymorphism:cds:p148G>RRGD 
Il6stMousehyperandrogenism resistanceISOIL6ST (Homo sapiens)DNA:polymorphism:cds:p148G>RRGD 
IL6RHumanobesity susceptibilityIAGP DNA:duplicationRGD 
Il6rRatobesity susceptibilityISOIL6R (Homo sapiens)DNA:duplicationRGD 
Il6raMouseobesity susceptibilityISOIL6R (Homo sapiens)DNA:duplicationRGD 

Objects Annotated

Genes (Rattus norvegicus)
Il6r  (interleukin 6 receptor)
Il6st  (interleukin 6 cytokine family signal transducer)

Genes (Mus musculus)
Il6ra  (interleukin 6 receptor, alpha)
Il6st  (interleukin 6 signal transducer)

Genes (Homo sapiens)
IL6R  (interleukin 6 receptor)
IL6ST  (interleukin 6 cytokine family signal transducer)


Additional Information