title: Design and synthesis of a novel series of N-alkyl isatin acylhydrazone derivatives that act as selective cannabinoid receptor 2 agonists for the treatment of neuropathic pain.
abstract: There is growing interest in using cannabinoid receptor 2 (CB2) agonists for the treatment of neuropathic pain. We have synthesized a novel series of N-alkyl isatin acylhydrazone derivatives and have identified and characterized several of them as novel analogues with high functional activity and selectivity at human CB2 receptors using [(35)S]GTP-gamma-S assays. Binding affinities at human CB2 and CB1 were determined for compounds 28, 33, 40, 48, and 58. Structure-activity relationship studies of this novel series led to optimization of our lead compound, compound 33 (MDA19). Compound 33 possessed potent antiallodynic effects in a rat model of neuropathic pain but did not affect rat locomotor activity. More potent and more CB2-receptor-selective compounds, including compounds 37, 40, and 48, were also discovered.
authors.affiliation: Department of Anesthesiology and Pain Medicine, The University of Texas M. D. Anderson Cancer Center, Houston, Texas 77030, USA.
authors.forename: Philippe
authors.initials: P
authors.lastname: Diaz
authors.forename: Jijun
authors.initials: J
authors.lastname: Xu
authors.forename: Fanny
authors.initials: F
authors.lastname: Astruc-Diaz
authors.forename: Hao-Min
authors.initials: HM
authors.lastname: Pan
authors.forename: David L
authors.initials: DL
authors.lastname: Brown
authors.forename: Mohamed
authors.initials: M
authors.lastname: Naguib
mesh_terms: D000818:Animals; D016466:CHO Cells; D006224:Cricetinae; D003412:Cricetulus; D015195:Drug Design; D006801:Humans; D006835:Hydrazones / Q000138:chemical synthesis* / Q000494:pharmacology*; D007510:Isatin / Q000031:analogs & derivatives* / Q000138:chemical synthesis; D009437:Neuralgia / Q000188:drug therapy*; D051381:Rats; D043884:Receptor, Cannabinoid, CB1 / Q000378:metabolism; D043885:Receptor, Cannabinoid, CB2 / Q000819:agonists* / Q000378:metabolism; D013329:Structure-Activity Relationship; D014961:X-Ray Diffraction
chemical_list: D006835:Hydrazones; D043884:Receptor, Cannabinoid, CB1; D043885:Receptor, Cannabinoid, CB2; D007510:Isatin