RESUMEN
Recently sulfamoyl benzamides were identified as a novel series of cannabinoid receptor ligands. Replacing the sulfonamide functionality and reversing the original carboxamide bond led to the discovery of N-(3-(morpholinomethyl)-phenyl)-amides as potent and selective CB(2) agonists. Selective CB(2) agonist 31 (K(i)=2.7; CB(1)/CB(2)=190) displayed robust activity in a rodent model of postoperative pain.
Asunto(s)
Antiinflamatorios/química , Benzamidas/química , Receptor Cannabinoide CB2/agonistas , Animales , Antiinflamatorios/síntesis química , Antiinflamatorios/farmacología , Benzamidas/síntesis química , Benzamidas/farmacología , Células CHO , Línea Celular , Cricetinae , Cricetulus , Descubrimiento de Drogas , Humanos , Dolor Postoperatorio/tratamiento farmacológico , Ratas , Receptor Cannabinoide CB2/metabolismo , Estereoisomerismo , Relación Estructura-Actividad , TransfecciónRESUMEN
Previous research within our laboratories identified sulfamoyl benzamides as novel cannabinoid receptor ligands. Optimization of the amide linkage led to the reverse amide 40. The compound exhibited robust antiallodynic activity in a rodent pain model when administered intraperitoneally. Efficacy after oral administration was observed only when ABT, a cytochrome P450 suicide inhibitor, was coadministered.
Asunto(s)
Benzamidas/farmacología , Receptor Cannabinoide CB2/efectos de los fármacos , Animales , Benzamidas/administración & dosificación , Benzamidas/química , Benzamidas/uso terapéutico , Dolor/tratamiento farmacológico , RoedoresRESUMEN
Sulfamoyl benzamides were identified as a novel series of cannabinoid receptor ligands. Starting from a screening hit 8 that had modest affinity for the cannabinoid CB(2) receptor, a parallel synthesis approach and initial SAR are described, leading to compound 27 with 120-fold functional selectivity for the CB(2) receptor. This compound produced robust antiallodynic activity in rodent models of postoperative pain and neuropathic pain without traditional cannabinergic side effects.
Asunto(s)
Benzamidas/uso terapéutico , Neuralgia/tratamiento farmacológico , Receptor Cannabinoide CB2/metabolismo , Sulfonamidas/uso terapéutico , Animales , Benzamidas/síntesis química , Benzamidas/farmacología , Sitios de Unión , Relación Dosis-Respuesta a Droga , Ligandos , Ratones , Modelos Animales , Modelos Químicos , Dimensión del Dolor/efectos de los fármacos , Ratas , Receptor Cannabinoide CB2/química , Relación Estructura-Actividad , Sulfonamidas/síntesis química , Sulfonamidas/farmacologíaRESUMEN
Synthesis, in vitro biological evaluation, and structure-activity relationships of a biaryl cannabinoid mimetic 2 are reported. Variations in the substitution pattern yielded a number of agonists with low nanomolar affinity. Replacing the phenol group by a methyl morpholino acetate group led to compound 28, a 500-fold selective CB(2) receptor agonist.
Asunto(s)
Cannabinoides/química , Cannabinoides/síntesis química , Química Farmacéutica/métodos , Ácidos Carboxílicos/química , Diseño de Fármacos , Evaluación Preclínica de Medicamentos , Humanos , Hidrógeno/química , Enlace de Hidrógeno , Inmunosupresores/química , Concentración 50 Inhibidora , Cinética , Modelos Químicos , Parasimpatolíticos , Fenol/química , Unión ProteicaRESUMEN
A novel series of phenylamino acetamide derivatives was synthesized. These amides were shown to be potent and selective kappa opioid receptor agonists.
Asunto(s)
Acetamidas/química , Analgésicos Opioides/química , Compuestos de Anilina/química , Receptores Opioides kappa/agonistas , Analgésicos Opioides/farmacología , Animales , Humanos , Relación Estructura-ActividadRESUMEN
Some kappa opioid receptor agonists of the arylacetamide class, for example, ICI 199441 (1), were found to strongly inhibit the activity of cytochrome P450 2D6 (CYP2D6) (1: CYP2D6 IC50=26 nM). Certain analogs bearing a substituted sulfonylamino group, for example, 13, were discovered to have significantly reduced CYP2D6 inhibitory activity (13: CYP2D6 IC50>10 microM) while displaying high affinity toward the cloned human kappa opioid receptor, good kappa/delta and kappa/mu selectivity, and potent in vitro and in vivo agonist activity.
Asunto(s)
Acetamidas/farmacología , Inhibidores del Citocromo P-450 CYP2D6 , Inhibidores Enzimáticos/farmacología , Receptores Opioides kappa/agonistas , Especificidad por SustratoRESUMEN
(S)-4-(Carboxamido)phenylalanine (Cpa) is examined as a bioisosteric replacement for the terminal tyrosine (Tyr) residue in a variety of known peptide ligands for the mu, delta and kappa opioid receptors. The Cpa-containing peptides, assayed against cloned human opioid receptors, display comparable binding affinity (Ki), and agonist potency (EC50) to the parent ligands at the three receptors. Cpa analogs of delta selective peptides show an increase in delta selectivity relative to the mu receptor. Cpa is the first example of an amino acid that acts as a surrogate for Tyr in opioid peptide ligands, challenging the long-standing belief that a phenolic residue is required for high affinity binding.
Asunto(s)
Analgésicos Opioides/síntesis química , Fenilalanina/análogos & derivados , Fenilalanina/síntesis química , Receptores Opioides delta/metabolismo , Receptores Opioides kappa/metabolismo , Receptores Opioides mu/metabolismo , Tirosina/farmacología , Aminoácidos Aromáticos/síntesis química , Aminoácidos Aromáticos/farmacología , Analgésicos Opioides/farmacología , Sitios de Unión , Línea Celular , Humanos , Ligandos , Estructura Molecular , Péptidos Opioides/metabolismo , Fenol/química , Fenilalanina/farmacología , Receptores Opioides delta/efectos de los fármacos , Receptores Opioides kappa/efectos de los fármacos , Receptores Opioides mu/efectos de los fármacosRESUMEN
trans-3,4-Dimethyl-4-(3-carboxamidophenyl)piperidines constitute a novel class of micro opioid receptor antagonists. The CONH(2) group was found to be an effective isostere of the phenolic OH moiety. Structure-activity relationships at the piperidine nitrogen position led to the identification of several ligands displaying high affinity toward the cloned human micro opioid receptors, good selectivity micro/delta, micro/kappa, and potent in vitro antagonist activity.
Asunto(s)
Piperidinas/síntesis química , Piperidinas/farmacología , Receptores Opioides mu/antagonistas & inhibidores , Unión Competitiva , Clonación Molecular , Diprenorfina/metabolismo , Humanos , Cinética , Modelos Moleculares , Conformación Molecular , Piperidinas/química , Proteínas Recombinantes/antagonistas & inhibidores , Relación Estructura-ActividadRESUMEN
Endonuclease G, a protein historically thought to be involved in mitochondrial DNA (mtDNA) replication, repair, recombination and degradation, has recently been reported to be involved in nuclear DNA degradation during the apoptotic process. As a result, its involvement in mtDNA homeostasis has been called into question and has necessitated detailed analyses of its precise location within the mitochondrion. Data is presented localizing rat liver endonuclease G activity exclusively to the mitochondrial intermembrane space with no activity associated with either the interior face of the inner mitochondrial membrane or with the mitochondrial matrix. Additionally, it is shown that endonuclease G can be selectively released from the mitochondrion via induction of a Ca2+-induced mitochondrial permeability transition and that, upon its release, a further nuclease activity loosely associated with the interior face of the inner mitochondrial membrane and distinct in its properties from that of endonuclease G can be detected.