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Anales del Sistema Sanitario de Navarra
Print version ISSN 1137-6627
Abstract
GOYENECHEA, E.; PARRA, M. D. and MARTINEZ HERNANDEZ, J. A.. Role of IL-6 and its -174G>C polymorphism in weight management and in the metabolic comorbidities associated with obesity. Anales Sis San Navarra [online]. 2005, vol.28, n.3, pp.357-366. ISSN 1137-6627.
Obesity and its comorbidities have been associated with a low grade proinflammatory state, in which the adipose tissue seems to be involved. In fact, this tissue produces different proinflammatory cytokines, such as IL-6 and others. High circulating concentrations of IL-6 have been related to high body mass index, to diabetes mellitus type 2, to lipid abnormalities and to high blood pressure. There are some studies, which reported a relationship between IL-6 and energy metabolism, so this cytokine and its -174GC gene polymorphism could be factors involved in the development of obesity. Different studies have associated the G allele of the IL-6 gene with obesity, with insulin resistance and with different cardiovascular risk factors. However, other published reports have associated the C allele of this gene to these metabolic disturbances and pathologies. This paper reviews recently published evidences about IL-6 and its physiopathological involvement in obesity and comorbidities, with emphasis on the role of the -174GC polymorphism in the aetiology of these disturbances, in which obesity is a major risk factor.
Keywords : IL-6; Obesity; Diabetes; Polymorphism; High blood pressure.