RESUMO
A series of 2-piperazinyl-5-alkoxypyridines were synthesized and screened against human GPR119 receptor. Through SAR analysis, compounds containing 2-alkylsulfonylpiperazinyl-5-alkoxypyridines were discovered and found to be potent agonists of the human GPR119 receptor.
Assuntos
Piridinas/farmacologia , Receptores Acoplados a Proteínas G/agonistas , Animais , Meia-Vida , Humanos , Camundongos , Piridinas/química , Piridinas/farmacocinética , Relação Estrutura-AtividadeRESUMO
GPR119 is a 7-transmembrane receptor that is expressed in the enteroendocrine cells in the intestine and in the islets of Langerhans in the pancreas. Indolines and 6,7-dihydro-5H-pyrrolo[2,3-a]pyrimidines were discovered as G protein-coupled receptor 119 (GPR119) agonists, and lead optimization efforts led to the identification of 1-methylethyl 4-({7-[2-fluoro-4-(methylsulfonyl)phenyl]-6,7-dihydro-5H-pyrrolo[2,3-d]pyrimidin-4-yl}oxy)-1-piperidinecarboxylate (GSK1104252A) (3), a potent and selective GPR119 agonist. Compound 3 showed excellent pharmacokinetic properties and sufficient selectivity with in vivo studies supporting a role for GPR119 in glucose homeostasis in the rodent. Thus, 3 appeared to modulate the enteroinsular axis, improve glycemic control, and strengthen previous suggestions that GPR119 agonists may have utility in the treatment of type 2 diabetes.
Assuntos
Hipoglicemiantes/síntese química , Piperidinas/síntese química , Pirimidinas/síntese química , Pirróis/síntese química , Receptores Acoplados a Proteínas G/agonistas , Administração Oral , Animais , Linhagem Celular , Colo/metabolismo , Peptídeo 1 Semelhante ao Glucagon/metabolismo , Glucose/metabolismo , Teste de Tolerância a Glucose , Humanos , Hipoglicemiantes/farmacocinética , Hipoglicemiantes/farmacologia , Incretinas/metabolismo , Mucosa Intestinal/metabolismo , Masculino , Camundongos , Camundongos Endogâmicos C57BL , Camundongos Knockout , Piperidinas/farmacocinética , Piperidinas/farmacologia , Pirimidinas/farmacocinética , Pirimidinas/farmacologia , Pirróis/farmacocinética , Pirróis/farmacologia , Ratos , Ratos Sprague-Dawley , Ratos Wistar , Estereoisomerismo , Relação Estrutura-AtividadeRESUMO
GPR40 is a member of a subfamily of homologous G protein-coupled receptors that include GPR41 and GPR43 and that have no current function or ligand ascribed. Ligand fishing experiments in HEK293 cells expressing human GPR40 revealed that a range of saturated and unsaturated carboxylic acids with carbon chain lengths greater than six were able to induce an elevation of [Ca(2+)](i), measured using a fluorometric imaging plate reader. 5,8,11-Eicosatriynoic acid was the most potent fatty acid tested, with a pEC(50) of 5.7. G protein coupling of GPR40 was examined in Chinese hamster ovary cells expressing the G alpha(q/i)-responsive Gal4-Elk1 reporter system. Expression of human GPR40 led to a constitutive induction of luciferase activity, which was further increased by exposure of the cells to eicosatriynoic acid. Neither the constitutive nor ligand-mediated luciferase induction was inhibited by pertussis toxin treatment, suggesting that GPR40 was coupled to G alpha(q/11.) Expression analysis by quantitative reverse transcription-PCR showed that GPR40 was specifically expressed in brain and pancreas, with expression in rodent pancreas being localized to insulin-producing beta-cells. These data suggest that some of the physiological effects of fatty acids in pancreatic islets and brain may be mediated through a cell-surface receptor.