Home Products Cited in Publications Worldwide Comprehensive Characterization of a Systematic Library of Alkyl and Alicyclic Synthetic Cannabinoids Related to CUMYL-PICA, CUMYL-BUTICA, CUMYL-CBMICA, and CUMYL-PINACA
ACS Chem. Neurosci.,2023,14(1):35-52.
Janssens, Liesl K; Ametovski, Adam; Sparkes, Eric; Boyd, Rochelle; Lai, Felcia; Maloney, Callan J; Rhook, Dane; Gerona, Roy R; Connolly, Matthew; Liu, Huiling; Hibbs, David E; Cairns, Elizabeth A; Banister, Samuel D; Stove, Christophe P
DOI:10.1021/acschemneuro.2c00408 PMID:36530139
Over 200 synthetic cannabinoid receptor agonists (SCRAs) have been identified as newpsychoactive substances. EffectivemonitoringandcharacterizationofSCRAsarehindered by the rapid pace of structural evolution. Ahead of possible appearanceontheillicitdrugmarket,newSCRAsweresynthesized tocompletea systematic libraryof cumyl-indole-(e.g.,CUMYL CPrMICA,CUMYL-CPMICA)andcumyl-indazole-carboxamides (e.g.,CUMYL-CPrMINACA,CUMYL-CPMINACA), encompass ing butyl, pentyl, cyclopropylmethyl, cyclobutylmethyl, cyclo pentylmethyl, andcyclohexylmethyl tails.Comprehensivepharma cologicalcharacterizationwasperformedwiththreeassayformats, monitoring the recruitment of either wild-type or C-terminally truncated(βarr2d366)β-arrestin2totheactivatedcannabinoid1 receptor(CB1)ormonitoringGβγ-mediatedmembranehyperpolarization.Alteredcompoundcharacterizationwasobservedwhen comparingderivedpotency(EC50)andefficacy(Emax)values frombothassaysmonitoringthesameoradifferentsignalingevent, whereasrangesandrankingordersweresimilar.Structure−activityrelationships(SAR)wereassessedinthreefold, resultinginthe identificationof thependant tailasacriticalpharmacophore,withtheoptimalchainlengthforCB1activationapproximatingann pentyl (e.g., cyclopentylmethyl or cyclohexylmethyl tail). The activityof the SCRAs encompassing cyclic tails decreasedwith decreasingnumberofcarbonsformingthecyclicmoiety,withCUMYL-CPrMICAshowingtheleastCB1activityinallassayformats. The SARs were rationalized viamolecular docking, demonstrating the importance of the optimal steric contributionof the hydrophobictail.WhileSARconclusionsremainedlargelyunchanged, thedifferential compoundcharacterizationbybothsimilar anddifferentassaydesignsemphasizestheimportanceofdetailingspecificassaycharacteristicstoallowadequateinterpretationof potenciesandefficacies.
structure−activity relationship ; functional assays ; membrane potential ; βarrestin2 recruitment ; new psychoactive substances ; molecular docking