Leptin and insulin are key hormones involved in the regulation of energy balance and glucose homeostasis. Development of resistance to the action of these hormones, which can occur with age, obesity and inflammation, appears to have a prime role in the pathogenesis of obesity and type 2 diabetes. Specific members of the suppressor of cytokine signaling (SOCS) family of proteins are now thought to have a role in the development of leptin and insulin resistance owing to their ability to inhibit leptin and insulin signaling pathways. In the case of leptin, current evidence suggests that SOCS3 appears to be of particular importance in the development of leptin resistance, whereas the ability to diminish insulin action has been described for several SOCS proteins (SOCS1, SOCS3, SOCS6 and SOCS7). © 2006 Elsevier Ltd. All rights reserved.
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