TY - JOUR T1 - Ciclazindol inhibits ATP-sensitive K+ channels and stimulates insulin secretion in CR1-G1 insulin-secreting cells. JF - Molecular Pharmacology JO - Mol Pharmacol SP - 715 LP - 720 VL - 49 IS - 4 AU - K Lee AU - R N Khan AU - I C Rowe AU - S E Ozanne AU - A C Hall AU - E Papadakis AU - C N Hales AU - M L Ashford Y1 - 1996/04/01 UR - http://molpharm.aspetjournals.org/content/49/4/715.abstract N2 - Ciclazindol, an anorectic drug, was shown to inhibit ATP-sensitive K+ (K(ATP)) channel currents and stimulate insulin secretion from CRI-G1 insulin-secreting cells. In contrast, the structurally related anorectic agent mazindol and the amphetamine-based anorectic compounds diethylpropion, fenfluramine, and phentermine had no effect on K(ATP) channel activity in this cell line. Similarly, cicliazindol elicited insulin secretion from CRI-G1 cells, whereas mazindol had no secretagogue action. The mechanism by which ciclazindol acts to inhibit K(ATP) channel activity is different than that of the sulfonylureas as ciclazindol is effective after procedures that decouple the sulfonylurea receptor from the K(ATP) channel. In agreement with this finding, ciclazindol failed to displace [3H]glibenclamide from CRI-G1 microsomal membranes. Further experiments demonstrated that ciclazindol has no significant effect on voltage-activated currents in this cell line. ER -