Deconstruction of the α4β2 Nicotinic Acetylcholine Receptor Positive Allosteric Modulator Desformylflustrabromine
摘要:
Desformylflustrabromine (dFBr; 1), perhaps the first selective positive allosteric modulator of alpha 4 beta 2 neuronal nicotinic acetylcholine (nACh) receptors, was deconstructed to determine which structural features contribute to its actions on receptors expressed in Xenopus ooycytes using two-electrode voltage clamp techniques. Although the intact structure of 1 was found to be optimal, several deconstructed analogs retained activity. Neither the 6-bromo substituent nor the entire 2-position chain is required for activity. In particular, reduction of the olefinic side chain of 1, as seen with 6, not only resulted in retention of activity/potency but in enhanced selectivity for alpha 4 beta 2 versus alpha 7 nACh receptors. Pharmacophoric features for the allosteric modulation of alpha 4 beta 2 nACh receptors by 1 were identified.
Deconstruction of the α4β2 Nicotinic Acetylcholine Receptor Positive Allosteric Modulator Desformylflustrabromine
摘要:
Desformylflustrabromine (dFBr; 1), perhaps the first selective positive allosteric modulator of alpha 4 beta 2 neuronal nicotinic acetylcholine (nACh) receptors, was deconstructed to determine which structural features contribute to its actions on receptors expressed in Xenopus ooycytes using two-electrode voltage clamp techniques. Although the intact structure of 1 was found to be optimal, several deconstructed analogs retained activity. Neither the 6-bromo substituent nor the entire 2-position chain is required for activity. In particular, reduction of the olefinic side chain of 1, as seen with 6, not only resulted in retention of activity/potency but in enhanced selectivity for alpha 4 beta 2 versus alpha 7 nACh receptors. Pharmacophoric features for the allosteric modulation of alpha 4 beta 2 nACh receptors by 1 were identified.
<i>des</i>-Formylflustrabromine (dFBr): A Structure–Activity Study on Its Ability To Potentiate the Action of Acetylcholine at α4β2 Nicotinic Acetylcholine Receptors
作者:Małgorzata Dukat、Atul Jain、Nadezhda German、Rossana Ferrara-Pontoriero、Yanzhou Huang、Yilong Ma、Marvin K. Schulte、Richard A. Glennon
DOI:10.1021/acschemneuro.8b00156
日期:2018.12.19
modulator (PAM) at α4β2 nicotinic acetylcholine receptors (nAChRs). We previously deconstructed this agent to determine which of its structural features contribute to its actions and have identified an agent that might serve as the basis for a " working pharmacophore". Here, we elaborate the dFBr (1; EC50 = 0.2 μM) structure to identify how various structural modifications impact its actions. Electrophysiological
Synthesis of desformylflustrabromine and its evaluation as an α4β2 and α7 nACh receptor modulator
作者:Jin-Sung Kim、Anshul Padnya、Maegan Weltzin、Brian W. Edmonds、Marvin K. Schulte、Richard A. Glennon
DOI:10.1016/j.bmcl.2007.06.047
日期:2007.9
Desformylflustrabromine (dFBr; 1) and desformylflustrabromine-B (dFBr-B; 2) have been previously isolated from natural sources, and the former has been demonstrated to be a novel and selective positive allosteric modulator of alpha 4 beta 2 nicotinic acetylcholine (nACh) receptors. The present study describes the synthesis of water-soluble salts of I and 2, and confirms and further investigates the actions of I and 2 using two-electrode voltage clamp recordings. (C) 2007 Elsevier Ltd. All rights reserved.