title: NOpiates: Novel Dual Action Neuronal Nitric Oxide Synthase Inhibitors with μ-Opioid Agonist Activity.
abstract: A novel series of benzimidazole designed multiple ligands (DMLs) with activity at the neuronal nitric oxide synthase (nNOS) enzyme and the μ-opioid receptor was developed. Targeting of the structurally dissimilar heme-containing enzyme and the μ-opioid GPCR was predicated on the modulatory role of nitric oxide on μ-opioid receptor function. Structure-activity relationship studies yielded lead compound 24 with excellent nNOS inhibitory activity (IC50 = 0.44 μM), selectivity over both endothelial nitric oxide synthase (10-fold) and inducible nitric oxide synthase (125-fold), and potent μ-opioid binding affinity, K i = 5.4 nM. The functional activity as measured in the cyclic adenosine monosphospate secondary messenger assay resulted in full agonist activity (EC50 = 0.34 μM). This work represents a novel approach in the development of new analgesics for the treatment of pain.
authors.affiliation: NeurAxon Inc. , 2395 Speakman Drive, Suite #1001, Mississauga, Ontario, L5K 1B3, Canada.
authors.forename: Paul
authors.initials: P
authors.lastname: Renton
authors.affiliation: NeurAxon Inc. , 2395 Speakman Drive, Suite #1001, Mississauga, Ontario, L5K 1B3, Canada.
authors.forename: Brenda
authors.initials: B
authors.lastname: Green
authors.affiliation: NeurAxon Inc. , 2395 Speakman Drive, Suite #1001, Mississauga, Ontario, L5K 1B3, Canada.
authors.forename: Shawn
authors.initials: S
authors.lastname: Maddaford
authors.affiliation: NeurAxon Inc. , 2395 Speakman Drive, Suite #1001, Mississauga, Ontario, L5K 1B3, Canada.
authors.forename: Suman
authors.initials: S
authors.lastname: Rakhit
authors.affiliation: NeurAxon Inc. , 2395 Speakman Drive, Suite #1001, Mississauga, Ontario, L5K 1B3, Canada.
authors.forename: John S
authors.initials: JS
authors.lastname: Andrews
keywords: NOS inhibitor; NOpiate; NOpioid; benzimidazole; dual action; nitric oxide; opioid