XOMA 052, an Anti-IL-1[Beta] Monoclonal Antibody, Prevents IL-1[Beta]-Mediated Insulin Resistance in 3T3-L1 Adipocytes
Interleukin-1β (IL-1β) has recently been implicated as a major cytokine that is involved in the pancreatic islet inflammation of type 2 diabetes mellitus. This inflammation impairs insulin secretion by inducing beta-cell apoptosis. Recent evidence has suggested that in obesity-induced inflammation,...
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Published in | Obesity (Silver Spring, Md.) Vol. 21; no. 2; p. 306 |
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Main Authors | , , , , , , |
Format | Journal Article |
Language | English |
Published |
Silver Spring
Blackwell Publishing Ltd
01.02.2013
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Subjects | |
Online Access | Get full text |
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Summary: | Interleukin-1β (IL-1β) has recently been implicated as a major cytokine that is involved in the pancreatic islet inflammation of type 2 diabetes mellitus. This inflammation impairs insulin secretion by inducing beta-cell apoptosis. Recent evidence has suggested that in obesity-induced inflammation, IL-1β playsakeyrole in causing insulin resistance in peripheral tissues. To further investigate the pathophysiological role of IL-1β in causing insulin resistance, the inhibitory effects of IL-1β on several insulin-dependent metabolic processes in vitro has been neutralized by XOMA 052. The role IL-1β plays in insulin resistance in adipose tissue was assessed using differentiated 3T3-L1 adipocytes and several parameters involved in insulin signaling and lipid metabolism were examined. IL-1β inhibited insulin-induced activation of Akt phosphorylation, glucose transport, and fatty acid uptake. IL-1β also blocked insulin-mediated downregulation of suppressor of cytokine signaling-3 expression. Co-preincubation of IL-1β with XOMA 052 neutralized nearly all of these inhibitory effects in 3T3-L1 adipocytes. These studies provide evidence, therefore, that IL-1β is a key proinflammatory cytokine that is involved in inducing insulin resistance. These studies also suggest that the monoclonal antibody XOMA 052 may be a possible therapeutic to effectively neutralize cytokine-mediated insulin resistance in adipose tissue. |
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ISSN: | 1930-7381 1930-739X |