alexa The early phase of glucose-stimulated insulin secretion requires nitric oxide.
Chemistry

Chemistry

Medicinal Chemistry

Author(s): Spinas GA, Laffranchi R, Francoys I, David I, Richter C,

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Abstract Nitric oxide (nitrogen monoxide, NO) acts as a signal transducer in a variety of cells. In the present study rat pancreatic islets were perifused with physiologically relevant glucose concentrations in the presence or absence of various NO-modulating agents. Perifusion in the presence of 0.1-1 mmol/l of the NO synthase inhibitor, NG-monomethyl-L-arginine or of 10 micromol/l of the NO-scavenger, 2-(4-carboxyphenyl)-4,4,5,5-tetramethylimidazoline-1-oxyl-3-oxide (carboxy-PTIO), resulted in an inhibition of the early phase of glucose-stimulated insulin secretion by 60-65\% and 46\%, respectively. Light- and electron-microscopic studies revealed that pancreatic islets constitutively express NO-synthase in alpha and delta cells, where it is confined to the secretory granules. Therefore, these data indicate that NO may be important in the signal transduction pathway of the early phase of glucose-stimulated insulin secretion. This article was published in Diabetologia and referenced in Medicinal Chemistry

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