RESUMO
Design, synthesis, and SAR are described for a class of DPP-IV inhibitors based on aminobenzo[a]quinolizines with non-aromatic substituents in the S1 specificity pocket. One representative thereof, carmegliptin (8p), was chosen for clinical development. Its X-ray structure in complex with the enzyme and early efficacy data in animal models of type 2 diabetes are also presented.
Assuntos
Diabetes Mellitus Tipo 2/tratamento farmacológico , Inibidores da Dipeptidil Peptidase IV , Inibidores da Dipeptidil Peptidase IV/síntese química , Desenho de Fármacos , Hipoglicemiantes/síntese química , Quinolizinas/síntese química , Animais , Ensaios Clínicos Fase II como Assunto , Cristalografia por Raios X , Preparações de Ação Retardada , Diabetes Mellitus Tipo 2/enzimologia , Diabetes Mellitus Tipo 2/metabolismo , Dipeptidil Peptidase 4/metabolismo , Inibidores da Dipeptidil Peptidase IV/administração & dosagem , Inibidores da Dipeptidil Peptidase IV/uso terapêutico , Cães , Humanos , Hipoglicemiantes/administração & dosagem , Hipoglicemiantes/uso terapêutico , Macaca fascicularis , Camundongos , Quinolizinas/administração & dosagem , Quinolizinas/uso terapêutico , Ratos , Ratos Wistar , Ratos ZuckerRESUMO
Synthesis and SAR are described for a structurally distinct class of DPP-IV inhibitors based on aminobenzo[a]quinolizines bearing (hetero-)aromatic substituents in the S1 specificity pocket. The m-(fluoromethyl)-phenyl derivative (S,S,S)-2g possesses the best fit in the S1 pocket. However, (S,S,S)-2i, bearing a more hydrophilic 5-methyl-pyridin-2-yl residue as substituent for the S1 pocket, displays excellent in vivo activity and superior drug-like properties.
Assuntos
Inibidores da Dipeptidil Peptidase IV , Inibidores da Dipeptidil Peptidase IV/química , Quinolizinas/química , Animais , Cristalografia por Raios X , Dipeptidil Peptidase 4/metabolismo , Inibidores da Dipeptidil Peptidase IV/metabolismo , Inibidores da Dipeptidil Peptidase IV/farmacologia , Humanos , Inibidores de Proteases/química , Inibidores de Proteases/metabolismo , Inibidores de Proteases/farmacologia , Quinolizinas/metabolismo , Quinolizinas/farmacologia , Ratos , Ratos ZuckerRESUMO
Design, synthesis, and SAR of novel alpha-alkoxy-beta-arylpropionic acids as potent and balanced PPARalphagamma coagonists are described. One representative thereof, Aleglitazar ((S)-2Aa), was chosen for clinical development. Its X-ray structure in complex with both receptors as well as its high efficacy in animal models of T2D and dyslipidemia are also presented.
Assuntos
Diabetes Mellitus Tipo 2/tratamento farmacológico , Oxazóis/síntese química , Oxazóis/farmacologia , PPAR alfa/agonistas , PPAR gama/agonistas , Tiofenos/síntese química , Tiofenos/farmacologia , Animais , Química Farmacêutica/métodos , Cristalografia por Raios X/métodos , Desenho de Fármacos , Dislipidemias/tratamento farmacológico , Humanos , Concentração Inibidora 50 , Ligantes , Modelos Químicos , Estrutura Molecular , Receptores Citoplasmáticos e Nucleares/metabolismoRESUMO
Diabetic cardiomyopathy is a complication of type 2 diabetes, with known contributions of lifestyle and genetics. We develop environmentally and genetically driven in vitro models of the condition using human-induced-pluripotent-stem-cell-derived cardiomyocytes. First, we mimic diabetic clinical chemistry to induce a phenotypic surrogate of diabetic cardiomyopathy, observing structural and functional disarray. Next, we consider genetic effects by deriving cardiomyocytes from two diabetic patients with variable disease progression. The cardiomyopathic phenotype is recapitulated in the patient-specific cells basally, with a severity dependent on their original clinical status. These models are incorporated into successive levels of a screening platform, identifying drugs that preserve cardiomyocyte phenotype in vitro during diabetic stress. In this work, we present a patient-specific induced pluripotent stem cell (iPSC) model of a complex metabolic condition, showing the power of this technique for discovery and testing of therapeutic strategies for a disease with ever-increasing clinical significance.
Assuntos
Cardiomiopatias Diabéticas/patologia , Avaliação Pré-Clínica de Medicamentos , Células-Tronco Pluripotentes Induzidas/citologia , Modelos Biológicos , Diferenciação Celular/efeitos dos fármacos , Humanos , Hipertrofia , Células-Tronco Pluripotentes Induzidas/efeitos dos fármacos , Metabolismo dos Lipídeos/efeitos dos fármacos , Peroxidação de Lipídeos/efeitos dos fármacos , Miócitos Cardíacos/efeitos dos fármacos , Miócitos Cardíacos/patologia , Fenótipo , Sarcômeros/efeitos dos fármacos , Sarcômeros/patologia , Bibliotecas de Moléculas Pequenas/análise , Bibliotecas de Moléculas Pequenas/química , Bibliotecas de Moléculas Pequenas/farmacologiaRESUMO
The use of human pluripotent stem cells (hPSCs) in cell therapy is hindered by the tumorigenic risk from residual undifferentiated cells. Here we performed a high-throughput screen of over 52,000 small molecules and identified 15 pluripotent cell-specific inhibitors (PluriSIns), nine of which share a common structural moiety. The PluriSIns selectively eliminated hPSCs while sparing a large array of progenitor and differentiated cells. Cellular and molecular analyses demonstrated that the most selective compound, PluriSIn #1, induces ER stress, protein synthesis attenuation, and apoptosis in hPSCs. Close examination identified this molecule as an inhibitor of stearoyl-coA desaturase (SCD1), the key enzyme in oleic acid biosynthesis, revealing a unique role for lipid metabolism in hPSCs. PluriSIn #1 was also cytotoxic to mouse blastocysts, indicating that the dependence on oleate is inherent to the pluripotent state. Finally, application of PluriSIn #1 prevented teratoma formation from tumorigenic undifferentiated cells. These findings should increase the safety of hPSC-based treatments.
Assuntos
Inibidores Enzimáticos/farmacologia , Ácido Oleico/síntese química , Células-Tronco Pluripotentes/efeitos dos fármacos , Estearoil-CoA Dessaturase/antagonistas & inibidores , Animais , Blastocisto/citologia , Blastocisto/efeitos dos fármacos , Blastocisto/metabolismo , Células Cultivadas , Humanos , Camundongos , Células-Tronco Pluripotentes/citologia , Células-Tronco Pluripotentes/metabolismoAssuntos
Diferenciação Celular , Neoplasias/patologia , Células-Tronco Pluripotentes/citologia , Transformação Celular Neoplásica/metabolismo , Transformação Celular Neoplásica/patologia , Humanos , Células-Tronco Neoplásicas/metabolismo , Células-Tronco Neoplásicas/patologia , Ácido Oleico/metabolismo , Estearoil-CoA Dessaturase/metabolismoRESUMO
Type 2 diabetes is a chronic metabolic disease characterized by the presence of both fasting and postprandial hyperglycemia which is a result of pancreas beta-cell dysfunction, deficiency in insulin secretion, insulin resistance and/or increased hepatic glucose production. More recently, the role of other glucoregulatory hormones, including glucagon, amylin, and the gut peptide glucagon-like peptide (GLP)-1, and an increase in the rate of postmeal carbohydrate absorption have also been included as important pathophysiologic defects. Existing anti-diabetes medications are often unefficient at achieving sustained glycemic control because they predominantly address only a single underlying defect. A number of alternative therapies for type 2 diabetes are currently under development that take advantage of the actions of the incretin hormones glucagon-like peptide-1 and glucose-dependent insulinotropic polypeptide on the pancreatic beta-cell. One such approach is based on the inhibition of dipeptidyl peptidase IV (DPP-IV), the major enzyme responsible for degrading the incretins in vivo. DPP-IV exhibits characteristics that have allowed the development of specific inhibitors with proven efficacy in improving glucose tolerance in animal models of diabetes and type 2 diabetic patients. While enhancement of insulin secretion, resulting from blockade of incretin degradation, has been proposed to be the major mode of inhibitor action, there is also evidence that inhibition of gastric emptying, reduction in glucagon secretion, peripheral insulin sensitization and important effects on beta-cell differentiation and survival can potentially preserve beta-cell mass, and improve insulin secretory function and glucose handling in diabetic patients. The present article focuses on the preclinical and clinical data of DPP-IV inhibitors that make it unique therapeutic agents representing the next generation of antidiabetes drugs.
Assuntos
Diabetes Mellitus Tipo 2/tratamento farmacológico , Inibidores da Dipeptidil Peptidase IV , Inibidores de Serina Proteinase/uso terapêutico , Diabetes Mellitus Tipo 2/enzimologia , Humanos , Inibidores de Serina Proteinase/farmacologiaRESUMO
The influence of aromatic substitution on a newly discovered class of inhibitors of dipeptidyl peptidase IV was investigated. A 10(5)-fold increase in potency was achieved by the optimization of aromatic substituents in a parallel chemistry program. The observed SAR could be explained by an X-ray structure of the protein-ligand complex.
Assuntos
Inibidores de Adenosina Desaminase , Glicoproteínas/antagonistas & inibidores , Inibidores de Proteases/química , Pirimidinas/química , Adenosina Desaminase/metabolismo , Glicoproteínas/metabolismo , Inibidores de Proteases/metabolismo , Pirimidinas/metabolismoRESUMO
In a novel series of DPP-IV inhibitors, a large increase of inhibitory activity was achieved by optimisation of aromatic substituents and conformational restriction.
Assuntos
Aminas/química , Dipeptidil Peptidase 4/efeitos dos fármacos , Inibidores Enzimáticos/síntese química , Piridinas/síntese química , Células Cultivadas , Diabetes Mellitus Tipo 2/tratamento farmacológico , Dipeptidil Peptidase 4/metabolismo , Inibidores Enzimáticos/metabolismo , Inibidores Enzimáticos/farmacologia , Hidrocarbonetos Aromáticos/química , Hidrocarbonetos Aromáticos/farmacologia , Concentração Inibidora 50 , Piridinas/metabolismo , Piridinas/farmacologia , Relação Estrutura-AtividadeRESUMO
A recently identified DPP-IV inhibitor (1) was found to induce phospholipidosis and to inhibit CYP3A4. A small series of less lipophilic and less amphiphilic analogues was synthesized in an effort to overcome these issues. One compound from this series was equipotent to 1, did not induce phospholipidosis and showed a reduced CYP3A4 inhibition.