RESUMEN
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.
Asunto(s)
Inhibidores de la Dipeptidil-Peptidasa IV/farmacología , Hipoglucemiantes/farmacología , Pirimidinas/farmacología , Pirrolidinas/farmacología , Administración Oral , Animales , Cristalografía por Rayos X , Diabetes Mellitus Tipo 2/tratamiento farmacológico , Inhibidores de la Dipeptidil-Peptidasa IV/síntesis química , Inhibidores de la Dipeptidil-Peptidasa IV/farmacocinética , Perros , Humanos , Hipoglucemiantes/síntesis química , Hipoglucemiantes/farmacocinética , Pirimidinas/síntesis química , Pirimidinas/farmacocinética , Pirrolidinas/síntesis química , Pirrolidinas/farmacocinética , Ratas , Ratas Sprague-Dawley , Relación Estructura-ActividadRESUMEN
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.
Asunto(s)
Dipeptidil Peptidasa 4/metabolismo , Inhibidores de la Dipeptidil-Peptidasa IV , Flúor/química , Inhibidores de Proteasas/química , Inhibidores de Proteasas/farmacología , Pirrolidinas/química , Pirrolidinas/farmacología , Animales , Cristalografía por Rayos X , Dipeptidil Peptidasa 4/química , Perros , Humanos , Modelos Moleculares , Estructura Molecular , Inhibidores de Proteasas/síntesis química , Inhibidores de Proteasas/farmacocinética , Pirrolidinas/síntesis química , Pirrolidinas/farmacocinética , Ratas , EstereoisomerismoRESUMEN
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.
Asunto(s)
Inhibidores de la Adenosina Desaminasa , Adenosina Desaminasa/química , Dipeptidil Peptidasa 4/química , Glicoproteínas/antagonistas & inhibidores , Glicoproteínas/química , Hipoglucemiantes/síntesis química , Nitrilos/síntesis química , Pirrolidinas/síntesis química , Administración Oral , Animales , Disponibilidad Biológica , Cristalografía por Rayos X , Diabetes Mellitus Tipo 2/tratamiento farmacológico , Perros , Humanos , Hipoglucemiantes/química , Hipoglucemiantes/farmacología , Inyecciones Intravenosas , Masculino , Ratones , Modelos Moleculares , Nitrilos/química , Nitrilos/farmacología , Pirrolidinas/química , Pirrolidinas/farmacología , Ratas , Ratas Sprague-Dawley , Relación Estructura-ActividadRESUMEN
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.
Asunto(s)
3',5'-AMP Cíclico Fosfodiesterasas/antagonistas & inhibidores , Gliburida/farmacología , Insulina/metabolismo , Islotes Pancreáticos/efectos de los fármacos , Milrinona/farmacología , Animales , Células Cultivadas , Fosfodiesterasas de Nucleótidos Cíclicos Tipo 3 , Relación Dosis-Respuesta a Droga , Sinergismo Farmacológico , Secreción de Insulina , Islotes Pancreáticos/metabolismo , Modelos Biológicos , Radioinmunoensayo , RatasRESUMEN
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.
Asunto(s)
Benzoatos/aislamiento & purificación , Inhibidores Enzimáticos/aislamiento & purificación , Monoéster Fosfórico Hidrolasas/antagonistas & inhibidores , Animales , Benzoatos/química , Benzoatos/farmacología , Inhibidores Enzimáticos/química , Inhibidores Enzimáticos/farmacología , Fermentación , Glucosa/metabolismo , Masculino , Microsomas Hepáticos/efectos de los fármacos , Microsomas Hepáticos/enzimología , Estructura Molecular , Ratas , Ratas Sprague-DawleyRESUMEN
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.