RESUMO
A backup molecule to compound 2 was sought by targeting the most likely metabolically vulnerable site in this molecule. Compound 18 was subsequently identified as a potent P2X(7) antagonist with very low in vivo clearance and high oral bioavailability in all species examined. Some evidence to support the role of P2X(7) in the etiology of pain is also presented.
Assuntos
Imidazolinas/farmacologia , Antagonistas Purinérgicos/farmacologia , Receptores Purinérgicos P2X7/efeitos dos fármacos , Administração Oral , Animais , Disponibilidade Biológica , Meia-Vida , Haplorrinos , Imidazolinas/administração & dosagem , Imidazolinas/química , Imidazolinas/farmacocinética , Antagonistas Purinérgicos/administração & dosagem , Antagonistas Purinérgicos/química , Antagonistas Purinérgicos/farmacocinética , RatosRESUMO
A computational lead-hopping exercise identified compound 4 as a structurally distinct P2X(7) receptor antagonist. Structure-activity relationships (SAR) of a series of pyroglutamic acid amide analogues of 4 were investigated and compound 31 was identified as a potent P2X(7) antagonist with excellent in vivo activity in animal models of pain, and a profile suitable for progression to clinical studies.
Assuntos
Amidas/farmacologia , Antagonistas do Receptor Purinérgico P2/farmacologia , Ácido Pirrolidonocarboxílico/química , Receptores Purinérgicos P2X7/efeitos dos fármacos , Amidas/química , Descoberta de Drogas , Modelos Moleculares , Antagonistas do Receptor Purinérgico P2/química , Relação Estrutura-AtividadeRESUMO
As part of an on-going lead optimisation effort, a cross screening exercise identified an aryl sulphonyl amide hit that was optimised to afford a highly potent series of ghrelin receptor agonists.
Assuntos
Química Farmacêutica/métodos , Grelina/química , Receptores de Grelina/antagonistas & inibidores , Sulfonas/química , Administração Oral , Animais , Disponibilidade Biológica , Desenho de Fármacos , Hormônio do Crescimento/química , Masculino , Modelos Químicos , Processamento de Proteína Pós-Traducional , Ratos , Ratos Sprague-Dawley , Receptores de Grelina/química , Relação Estrutura-AtividadeRESUMO
A series of small molecule orally bioavailable ghrelin receptor agonists have been identified through systematic optimisation of a high throughput screening hit.