RESUMO
Physical activity promotes metabolic and cardiovascular health benefits that derive in part from the transcriptional responses to exercise that occur within skeletal muscle and other organs. There is interest in discovering a pharmacologic exercise mimetic that could imbue wellness and alleviate disease burden. However, the molecular physiology by which exercise signals the transcriptional response is highly complex, making it challenging to identify a single target for pharmacological mimicry. The current studies evaluated the transcriptome responses in skeletal muscle, heart, liver, and white and brown adipose to novel small molecule activators of AMPK (pan-activators for all AMPK isoforms) compared to that of exercise. A striking level of congruence between exercise and pharmacological AMPK activation was observed across the induced transcriptome of these five tissues. However, differences in acute metabolic response between exercise and pharmacologic AMPK activation were observed, notably for acute glycogen balances and related to the energy expenditure induced by exercise but not pharmacologic AMPK activation. Nevertheless, intervention with repeated daily administration of short-acting activation of AMPK was found to mitigate hyperglycemia and hyperinsulinemia in four rodent models of metabolic disease and without the cardiac glycogen accretion noted with sustained pharmacologic AMPK activation. These findings affirm that activation of AMPK is a key node governing exercise mediated transcription and is an attractive target as an exercise mimetic.
Assuntos
Proteínas Quinases Ativadas por AMP/metabolismo , Tecido Adiposo/metabolismo , Fígado/metabolismo , Músculo Esquelético/metabolismo , Miocárdio/metabolismo , Animais , Metabolismo Energético , Ativação Enzimática/efeitos dos fármacos , Ácidos Graxos/metabolismo , Regulação da Expressão Gênica/efeitos dos fármacos , Glucose/metabolismo , Homeostase , Camundongos Endogâmicos C57BL , Oxirredução , Condicionamento Físico AnimalRESUMO
2-Amino-5-(thioaryl)thiazoles are potent inhibitors of TrkA (e.g., 20h, TrkA IC(50)=0.6 nM) that show anti-proliferative effect in cellular assays. A proposed inhibitor binding mode to TrkA active site is consistent with key SAR observations.
Assuntos
Receptor trkA/antagonistas & inibidores , Tiazóis/farmacologia , Fosforilação , Receptor trkA/metabolismo , Relação Estrutura-Atividade , Tiazóis/químicaRESUMO
A series of substituted 4-(4-fluoro-1H-indol-5-yloxy)pyrrolo[2,1-f][1,2,4]triazine-based inhibitors of vascular endothelial growth factor receptor-2 kinase is reported. Structure-activity relationship studies revealed that a methyl group at the 5-position and a substituted alkoxy group at the 6-position of the pyrrolo[2,1-f][1,2,4]triazine core gave potent compounds. Biochemical potency, kinase selectivity, and pharmacokinetics of the series were optimized and in vitro safety liabilities were minimized to afford BMS-540215 (12), which demonstrated robust preclinical in vivo activity in human tumor xenograft models. The l-alanine prodrug of 12, BMS-582664 (21), is currently under evaluation in clinical trials for the treatment of solid tumors.
Assuntos
Alanina/análogos & derivados , Inibidores da Angiogênese/síntese química , Pirróis/síntese química , Triazinas/síntese química , Receptor 2 de Fatores de Crescimento do Endotélio Vascular/antagonistas & inibidores , Alanina/síntese química , Alanina/farmacocinética , Alanina/farmacologia , Inibidores da Angiogênese/farmacocinética , Inibidores da Angiogênese/farmacologia , Animais , Linhagem Celular Tumoral , Ensaios de Seleção de Medicamentos Antitumorais , Humanos , Camundongos , Camundongos Endogâmicos BALB C , Camundongos Nus , Transplante de Neoplasias , Pró-Fármacos/síntese química , Pró-Fármacos/farmacocinética , Pró-Fármacos/farmacologia , Pirróis/farmacocinética , Pirróis/farmacologia , Estereoisomerismo , Relação Estrutura-Atividade , Transplante Heterólogo , Triazinas/farmacocinética , Triazinas/farmacologiaRESUMO
[formula: see text] 3-Cyano epothilones 15-18 are the only examples of non-hydroxy C-3-substituted analogues. Their tubulin binding affinity and cytotoxicity provide meaningful structure-activity relationship information on the dependence of C-1/C-3 conformation upon activity. 12-Cyano epothilone 24 has improved pH stability over epothilone B, and its activity further supports the hypothesis that C-12 stereochemistry is not critical for tubulin affinity.
Assuntos
Epotilonas/síntese química , Antineoplásicos/síntese química , Antineoplásicos/química , Antineoplásicos/farmacologia , Divisão Celular/efeitos dos fármacos , Estabilidade de Medicamentos , Epotilonas/química , Epotilonas/farmacologia , Humanos , Concentração de Íons de Hidrogênio , Estrutura Molecular , Relação Estrutura-Atividade , Tubulina (Proteína)/efeitos dos fármacos , Tubulina (Proteína)/metabolismo , Células Tumorais CultivadasRESUMO
Structure-activity relationships in a series of 4-[1H-indazol-5-ylamino]pyrrolo[2,1-f][1,2,4]triazine-6-carbamates identified dual human epidermal growth factor receptor (HER)1/HER2 kinase inhibitors with excellent biochemical potency and kinase selectivity. On the basis of its favorable pharmacokinetic profile and robust in vivo activity in HER1 and HER2 driven tumor models, 13 (BMS-599626) was selected as a clinical candidate for treatment of solid tumors.
Assuntos
Antineoplásicos/síntese química , Carbamatos/síntese química , Receptores ErbB/antagonistas & inibidores , Receptor ErbB-2/antagonistas & inibidores , Triazinas/síntese química , Administração Oral , Animais , Antineoplásicos/farmacocinética , Antineoplásicos/farmacologia , Disponibilidade Biológica , Carbamatos/farmacocinética , Carbamatos/farmacologia , Linhagem Celular Tumoral , Cães , Ensaios de Seleção de Medicamentos Antitumorais , Humanos , Macaca fascicularis , Camundongos , Transplante de Neoplasias , Estereoisomerismo , Relação Estrutura-Atividade , Transplante Heterólogo , Triazinas/farmacocinética , Triazinas/farmacologiaRESUMO
Pyrrolotriazine dual EGFR/HER2 kinase inhibitors with a 5-((4-aminopiperidin-1-yl)methyl) solubilizing group were found to be superior to analogs with previously reported C-5 solubilizing groups. New synthetic methodology was developed for the parallel synthesis of C-4 analogs with the new solubilizing group. Interesting new leads were evaluated in tumor xenograft models and the C-4 aminofluorobenzylindazole, 1c, was found to exhibit the best antitumor activity. It is hypothesized that this solubilizing group extends into the ribose-phosphate portion of the ATP binding pocket and enhances the binding affinity of the inhibitor.
Assuntos
Química Farmacêutica/métodos , Receptores ErbB/química , Neoplasias/tratamento farmacológico , Piperidinas/síntese química , Pirróis/síntese química , Receptor ErbB-2/química , Triazinas/síntese química , Trifosfato de Adenosina/metabolismo , Animais , Antineoplásicos/farmacologia , Linhagem Celular Tumoral , Desenho de Fármacos , Ensaios de Seleção de Medicamentos Antitumorais , Humanos , Concentração Inibidora 50 , Insetos , Modelos Químicos , Transplante de Neoplasias , Piperidinas/química , Piperidinas/farmacologia , Pirróis/química , Pirróis/farmacologia , Triazinas/química , Triazinas/farmacologiaRESUMO
The synthesis and SAR of a series of pyrrolopyridazine MEK inhibitors are reported. Optimal activity was achieved by incorporation of a 4-phenoxyaniline substituent at C4 and an acylated amine at C6.
Assuntos
Inibidores Enzimáticos/farmacologia , Quinases de Proteína Quinase Ativadas por Mitógeno/antagonistas & inibidores , Piridazinas/síntese química , Pirróis/síntese química , Acilação , Aminas/química , Compostos de Anilina/química , Animais , Desenho de Fármacos , Humanos , Piridazinas/farmacologia , Pirróis/farmacologia , Ratos , Relação Estrutura-AtividadeRESUMO
Computer aided drug design led to a new class of spiro-barbiturates (e.g., 4a, MMP-13 K(i)=4.7 nM) that are potent inhibitors of MMP-13.
Assuntos
Barbitúricos/síntese química , Inibidores Enzimáticos/química , Inibidores de Metaloproteinases de Matriz , Barbitúricos/farmacologia , Simulação por Computador , Desenho Assistido por Computador , Desenho de Fármacos , Inibidores Enzimáticos/farmacologia , Humanos , Cinética , Metaloproteinase 13 da Matriz , Modelos Moleculares , Osteoartrite/tratamento farmacológico , Compostos de Espiro/síntese química , Compostos de Espiro/farmacologia , Relação Estrutura-AtividadeRESUMO
A novel series of dual EGFR and HER2 inhibitors based on the pyrrolo[2,1-f][1,2,4]triazine nucleus is described. A general route toward their synthesis, which enables functionalization at multiple sites, has been developed. Biological evaluation in enzymatic and cell-based assays has identified a series of C-6 carbamates with potent biochemical and cellular activities.