Synthesis and binding studies of epibatidine analogues as ligands for the nicotinic acetylcholine receptors
摘要:
Neuronal nicotinic acetylcholine receptors (nAChRs) are transmembrane ligand-gated ion channels. Recent research demonstrated that selective nAChR ligands may have therapeutic potential in a number of CNS diseases and disorders. The alkaloid epibatidine is a highly potent non-opioid analgesic and nAChR agonist, but too toxic to be a useful ligand. To develop ligands selective for distinct nAChR subtypes and with reduced toxicity, a series of epibatidine and homoepibatidine analogues were synthesized. (+/-)-8-Methyl-3-(pyridin-3-yl)-8-azabicyclo[3,2,1]oct-2-ene, showed high affinity towards alpha 4 beta 2 (K-i = 2 nM), subtype selectivity (alpha 4 beta 2/alpha 7 affinity ratio > 100) and relatively low toxicity in mice and can be labeled with C-11 and F-18 as positron emission tomography (PET) tracers for imaging of nAChRs. (c) 2006 Elsevier SAS. All rights reserved.
Synthesis and binding studies of epibatidine analogues as ligands for the nicotinic acetylcholine receptors
摘要:
Neuronal nicotinic acetylcholine receptors (nAChRs) are transmembrane ligand-gated ion channels. Recent research demonstrated that selective nAChR ligands may have therapeutic potential in a number of CNS diseases and disorders. The alkaloid epibatidine is a highly potent non-opioid analgesic and nAChR agonist, but too toxic to be a useful ligand. To develop ligands selective for distinct nAChR subtypes and with reduced toxicity, a series of epibatidine and homoepibatidine analogues were synthesized. (+/-)-8-Methyl-3-(pyridin-3-yl)-8-azabicyclo[3,2,1]oct-2-ene, showed high affinity towards alpha 4 beta 2 (K-i = 2 nM), subtype selectivity (alpha 4 beta 2/alpha 7 affinity ratio > 100) and relatively low toxicity in mice and can be labeled with C-11 and F-18 as positron emission tomography (PET) tracers for imaging of nAChRs. (c) 2006 Elsevier SAS. All rights reserved.