RESUMO
A series of 4-substituted proline amides was synthesized and evaluated as inhibitors of dipeptidyl pepdidase IV for the treatment of type 2 diabetes. (3,3-Difluoro-pyrrolidin-1-yl)-[(2S,4S)-(4-(4-pyrimidin-2-yl-piperazin-1-yl)-pyrrolidin-2-yl]-methanone (5) emerged as a potent (IC(50) = 13 nM) and selective compound, with high oral bioavailability in preclinical species and low plasma protein binding. Compound 5, PF-00734200, was selected for development as a potential new treatment for type 2 diabetes.
Assuntos
Inibidores da Dipeptidil Peptidase IV/farmacologia , Hipoglicemiantes/farmacologia , Pirimidinas/farmacologia , Pirrolidinas/farmacologia , Administração Oral , Animais , Cristalografia por Raios X , Diabetes Mellitus Tipo 2/tratamento farmacológico , Inibidores da Dipeptidil Peptidase IV/síntese química , Inibidores da Dipeptidil Peptidase IV/farmacocinética , Cães , Humanos , Hipoglicemiantes/síntese química , Hipoglicemiantes/farmacocinética , Pirimidinas/síntese química , Pirimidinas/farmacocinética , Pirrolidinas/síntese química , Pirrolidinas/farmacocinética , Ratos , Ratos Sprague-Dawley , Relação Estrutura-AtividadeRESUMO
Inhibitors of the glucagon-like peptide-1 (GLP-1) degrading enzyme dipeptidyl peptidase IV (DPP-IV) have been shown to be effective treatments for type 2 diabetes in animal models and in human subjects. A novel series of cis-2,5-dicyanopyrrolidine alpha-amino amides were synthesized and evaluated as inhibitors of dipeptidyl peptidase IV (DPP-IV) for the treatment of type 2 diabetes. 1-({[1-(Hydroxymethyl)cyclopentyl]amino}acetyl)pyrrolidine-2,5-cis-dicarbonitrile (1c) is an achiral, slow-binding (time-dependent) inhibitor of DPP-IV that is selective for DPP-IV over other DPP isozymes and proline specific serine proteases, and which has oral bioavailability in preclinical species and in vivo efficacy in animal models. The mode of binding of the cis-2,5-dicyanopyrrolidine moiety was determined by X-ray crystallography. The hydrochloride salt of 1c was further profiled for development as a potential new treatment for type 2 diabetes.
Assuntos
Inibidores de Adenosina Desaminase , Adenosina Desaminase/química , Dipeptidil Peptidase 4/química , Glicoproteínas/antagonistas & inibidores , Glicoproteínas/química , Hipoglicemiantes/síntese química , Nitrilas/síntese química , Pirrolidinas/síntese química , Administração Oral , Animais , Disponibilidade Biológica , Cristalografia por Raios X , Diabetes Mellitus Tipo 2/tratamento farmacológico , Cães , Humanos , Hipoglicemiantes/química , Hipoglicemiantes/farmacologia , Injeções Intravenosas , Masculino , Camundongos , Modelos Moleculares , Nitrilas/química , Nitrilas/farmacologia , Pirrolidinas/química , Pirrolidinas/farmacologia , Ratos , Ratos Sprague-Dawley , Relação Estrutura-AtividadeRESUMO
The effects on insulin secretion from INS-1 cells of varying concentrations of the sulfonylurea glyburide and the PDE3 inhibitor milrinone, separately and in combination were measured. Over a range of concentrations the effects of the two drugs in combination were more than additive. A response surface model was fit to the data and was found to describe the data well. From this model, it was apparent that a significant synergistic effect upon insulin secretion existed over a wide range of combinations of the two drugs.
Assuntos
3',5'-AMP Cíclico Fosfodiesterases/antagonistas & inibidores , Glibureto/farmacologia , Insulina/metabolismo , Ilhotas Pancreáticas/efeitos dos fármacos , Milrinona/farmacologia , Animais , Células Cultivadas , Nucleotídeo Cíclico Fosfodiesterase do Tipo 3 , Relação Dose-Resposta a Droga , Sinergismo Farmacológico , Secreção de Insulina , Ilhotas Pancreáticas/metabolismo , Modelos Biológicos , Radioimunoensaio , RatosRESUMO
A new D-glucose-6-phosphate phosphohydrolase (G6Pase) inhibitor, CJ-21,164 (1) was isolated from the fermentation broth of the fungus Chloridium sp. CL48903. The structure was elucidated to be a novel tetramer of the salicylic acid derivatives by spectroscopic analyses. Compound I inhibited G6Pase in rat liver microsomes with an IC50 of 1.6 microM. Glucose output from hepatocytes isolated from rat liver was inhibited when I was present in the incubation medium, consistent with the role of I as a G6Pase inhibitor.
Assuntos
Benzoatos/isolamento & purificação , Inibidores Enzimáticos/isolamento & purificação , Monoéster Fosfórico Hidrolases/antagonistas & inibidores , Animais , Benzoatos/química , Benzoatos/farmacologia , Inibidores Enzimáticos/química , Inibidores Enzimáticos/farmacologia , Fermentação , Glucose/metabolismo , Masculino , Microssomos Hepáticos/efeitos dos fármacos , Microssomos Hepáticos/enzimologia , Estrutura Molecular , Ratos , Ratos Sprague-DawleyRESUMO
High-throughput screening of microbial extracts using rat hepatic microsomal glucose-6-phosphatase (G6Pase) led us to find thielavin B as a G6Pase inhibitor with inhibition of glucose output from glucagon-stimulated hepatocytes. Further searching for more potent analogs identified 11 new thielavins F-P in addition to the known thielavins A and B from a fungus Chaetomium carinthiacum ATCC 46463. Thielavin G showed the strongest activity as a G6Pase inhibitor (IC50=0.33 microM), while the IC50 of thielavin B was 5.5 microM. According to the structure-activity relationship, including authentic thielavins C, D and 3 partial hydrolysates from thielavins A and B, 3 benzoic acid-units and carboxylic acid functions are essential for G6Pase inhibition.
Assuntos
Benzoatos/farmacologia , Inibidores Enzimáticos/farmacologia , Glucose-6-Fosfatase/antagonistas & inibidores , Hidroxibenzoatos/farmacologia , Animais , Benzoatos/química , Benzoatos/isolamento & purificação , Chaetomium/metabolismo , Fenômenos Químicos , Físico-Química , Cromatografia Líquida de Alta Pressão , Fermentação , Glucagon/farmacologia , Glucose/metabolismo , Hepatócitos/efeitos dos fármacos , Hepatócitos/metabolismo , Hidrólise , Hidroxibenzoatos/química , Hidroxibenzoatos/isolamento & purificação , Espectroscopia de Ressonância Magnética , Microssomos Hepáticos/enzimologia , Estrutura Molecular , Ratos , Ratos Sprague-Dawley , Espectrometria de Massas de Bombardeamento Rápido de Átomos , Relação Estrutura-AtividadeRESUMO
A series of pyrrolidine based inhibitors of dipeptidyl peptidase IV were developed from a high throughput screening hit for the treatment of type 2 diabetes. Potency, selectivity, and pharmacokinetic properties were optimized resulting in the identification of a pre-clinical candidate for further profiling.