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![]() [Cover Caption] Other Issues: |
Contents:
Volume 87, Issue 2; April, 2007.
[Index by Author] [Editorial Board]
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= article is free immediately upon publication
(all articles are free one year after publication)
Cover: Mechanism of fatty acid-induced insulin resistance in the liver. Increases in diacylglycerol (DAG), due to increased lipogenesis and/or decreased mitochondrial fatty acid oxidation, activate protein kinase C (PKC)-ε, which binds to and activates the insulin receptor kinase resulting in reduced insulin-stimulated insulin receptor substrate (IRS)-1 and IRS-2 tyrosine phosphorylation. This in turn results in reduced insulin activation of phosphoinositol (PI) 3-kinase and AKT2. Reduced ATK2 activation results in lower glycogen synthase kinase-3 (GSK3) phosphorylation and lower forkhead box protein O (FOXO) phosphorylation, which in turn results in lower insulin-stimulated liver glycogen synthesis and decreased suppression of hepatic gluconeogenesis, respectively. See Savage, David B., Kitt Falk Petersen, and Gerald I. Shulman. Physiol Rev 87: 507-520, 2007.
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