J. S. Elmendorf

Publications69
h-index29
Citations2,725
Highly Influential Citations105
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Molecular Basis of Insulin-stimulated GLUT4 Vesicle Trafficking
Among all the diverse actions of insulin, one of the most critical and intensively studied is its regulation of glucose homeostasis. In the postabsorptive state, insulin action in muscle and adipose… Expand
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Regulation of Insulin-stimulated GLUT4 Translocation by Munc18c in 3T3L1 Adipocytes*
Insulin stimulates glucose transporter (GLUT) 4 vesicle translocation from intracellular storage sites to the plasma membrane in 3T3L1 adipocytes through a VAMP2- and syntaxin 4-dependent mechanism.… Expand
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Munc18c phosphorylation by the insulin receptor links cell signaling directly to SNARE exocytosis
SNARE complex assembly and mobilization of GLUT4 vesicles is coordinated through direct targeting of Munc18c by the insulin receptor tyrosine kinase.
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Osmotic Shock Stimulates GLUT4 Translocation in 3T3L1 Adipocytes by a Novel Tyrosine Kinase Pathway*
Similar to insulin, osmotic shock of 3T3L1 adipocytes stimulated an increase in glucose transport activity and translocation of GLUT4 protein from intracellularly localized vesicles to the plasma… Expand
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Synip: a novel insulin-regulated syntaxin 4-binding protein mediating GLUT4 translocation in adipocytes.
Insulin-stimulated glucose transport and GLUT4 translocation require regulated interactions between the v-SNARE, VAMP2, and the t-SNARE, syntaxin 4. We have isolated a novel syntaxin 4-binding… Expand
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Chromium activates glucose transporter 4 trafficking and enhances insulin-stimulated glucose transport in 3T3-L1 adipocytes via a cholesterol-dependent mechanism.
Evidence suggests that chromium supplementation may alleviate symptoms associated with diabetes, such as high blood glucose and lipid abnormalities, yet a molecular mechanism remains unclear. Here,… Expand
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Protective Effect of Phosphatidylinositol 4,5-Bisphosphate against Cortical Filamentous Actin Loss and Insulin Resistance Induced by Sustained Exposure of 3T3-L1 Adipocytes to Insulin*
Muscle and fat cells develop insulin resistance when cultured under hyperinsulinemic conditions for sustained periods. Recent data indicate that early insulin signaling defects do not fully account… Expand
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Loss of cortical actin filaments in insulin-resistant skeletal muscle cells impairs GLUT4 vesicle trafficking and glucose transport.
Study has demonstrated an essential role of cortical filamentous actin (F-actin) in insulin-regulated glucose uptake by skeletal muscle. Here, we tested whether perturbations in F-actin contributed… Expand
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AMPK enhances insulin-stimulated GLUT4 regulation via lowering membrane cholesterol.
AMP-activated protein kinase (AMPK) enhances glucose transporter GLUT4 regulation. AMPK also suppresses energy-consuming pathways such as cholesterol synthesis. Interestingly, recent in vitro and in… Expand
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Signaling, cytoskeletal and membrane mechanisms regulating GLUT4 exocytosis
Solving how insulin regulates glucose transport into skeletal muscle and adipose tissue remains a fundamental challenge in biology and a significant issue in medicine. A central feature of this… Expand
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