Adipose tissue hormones and appetite and body weight regulators in insulin resistance

Posted by Chantel Martiromo, research contributed by PubMed

Impaired sensitivity to insulin (the so called insulin resistance, IR) occurs in a number of genetic and acquired conditions, including obesity, non-insulin dependent diabetes mellitus, polycystic ovary syndrome (PCOS) and metabolic syndrome (MS). According to the study by the St George University Hospital, posted in PubMed, Leptin acts as a major adipostat: it suppresses food intake and activates catabolic pathways associated with increased energy production. It improves the peripheral insulin sensitivity and affects beta-cell function. Adiponectin is the only adipocytokine discovered so far that has anti-atherogenic properties. There is a reverse correlation between the serum adiponectin levels and the degree of obesity, IR, impaired glucose tolerance, dyslipidemia and atherosclerosis. Ghrelin stimulates food intake; of all circulating orexigenic hormones ghrelin is the most thoroughly studied. Ghrelin levels are decreased in MS and PCOS patients as this hormone is negatively correlated with body mass. Resistin is a hormone secreted by adipose tissues; a growing body of evidence suggests that it might be implicated in the link between obesity and diabetes. It has been found that the hormone's levels are significantly higher in obese people than those in normal body mass people.

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