RESUMO
A screening hit was used as the basis for the core structure of a new series of acylglycinamide GlyT-1 inhibitors. Investigation of the SAR around four areas of diversity used facile chemistry to prepare compounds quickly. By focussing on reducing the lipophilicity and improving the aqueous solubility in the series we were able to prepare a compound (17e) with a good level of activity at GlyT-1, selectivity over GlyT-2 and moderate oral bioavailability.
Assuntos
Proteínas da Membrana Plasmática de Transporte de Glicina/antagonistas & inibidores , Glicina/análogos & derivados , Animais , Glicina/química , Glicina/metabolismo , Glicina/farmacocinética , Glicina/farmacologia , Proteínas da Membrana Plasmática de Transporte de Glicina/metabolismo , Humanos , Concentração Inibidora 50 , Ratos , Solubilidade , Relação Estrutura-AtividadeRESUMO
The identification of a highly selective D(2) partial agonist, D(3) antagonist tool molecule which demonstrates high levels of brain exposure and selectivity against an extensive range of dopamine, serotonin, adrenergic, histamine, and muscarinic receptors is described.
Assuntos
Encéfalo/efeitos dos fármacos , Agonistas de Dopamina/farmacologia , Antagonistas de Dopamina/farmacologia , Receptores de Dopamina D2/agonistas , Receptores de Dopamina D3/antagonistas & inibidores , Animais , Encéfalo/metabolismoRESUMO
A high-throughput screen targeting the EP(1) receptor identified non-acidic glycine sulfonamide derivative 2a with a pK(i) of 6.2. Analogue synthesis allowed a thorough investigation of the structure-activity relationship (SAR) and led to a 100-fold increase in recombinant potency.
Assuntos
Glicinérgicos/síntese química , Glicinérgicos/farmacologia , Receptores de Prostaglandina E/antagonistas & inibidores , Sulfonamidas/síntese química , Sulfonamidas/farmacologia , Animais , Células CHO , Membrana Celular/metabolismo , Cromatografia Líquida de Alta Pressão , Cricetinae , Cricetulus , Sistema Enzimático do Citocromo P-450/metabolismo , Dinoprostona/metabolismo , Avaliação Pré-Clínica de Medicamentos , Humanos , Indicadores e Reagentes , Receptores de Prostaglandina E Subtipo EP1RESUMO
The discovery, synthesis and structure-activity relationship (SAR) of a novel series of EP1 receptor antagonists is described. Pyrazole acid 4, identified from a chemical array, had desirable physicochemical properties, an excellent in vitro microsomal inhibition and cytochrome P450 (CYP450) profile and good exposure levels in blood. This compound had an ED50 of 1.3 mg/kg in a rat pain model. A range of more potent analogues in the in vitro assay was identified using efficient array chemistry. These EP1 antagonists have potential as agents in the treatment of PGE2 mediated pain.
