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lüll An integrated view of insulin resistance and endothelial dysfunction Muniyappa R; Iantorno M; Quon MJEndocrinol Metab Clin North Am 2008[Sep]; 37 (3): 685-711, ix-xEndothelial dysfunction and insulin resistance are frequently comorbid states. Vasodilator actions of insulin are mediated by phosphatidylinositol 3-kinase (PI3K)-dependent signaling pathways that stimulate production of nitric oxide from vascular endothelium. This helps to couple metabolic and hemodynamic homeostasis under healthy conditions. In pathologic states, shared causal factors, including glucotoxicity, lipotoxicity, and inflammation selectively impair PI3K-dependent insulin signaling pathways that contribute to reciprocal relationships between insulin resistance and endothelial dysfunction. This article discusses the implications of pathway-selective insulin resistance in vascular endothelium, interactions between endothelial dysfunction and insulin resistance, and therapeutic interventions that may simultaneously improve both metabolic and cardiovascular physiology in insulin-resistant conditions.|*Insulin Resistance[MESH]|Animals[MESH]|Cytokines/physiology[MESH]|Endothelin-1/metabolism[MESH]|Endothelium, Vascular/*physiology[MESH]|Fatty Acids, Nonesterified/physiology[MESH]|Humans[MESH]|Insulin/physiology[MESH]|Nitric Oxide/physiology[MESH]|Signal Transduction[MESH] |