RESUMO
ATM inhibitors, such as 7, have demonstrated the antitumor potential of ATM inhibition when combined with DNA double-strand break-inducing agents in mouse xenograft models. However, the properties of 7 result in a relatively high predicted clinically efficacious dose. In an attempt to minimize attrition during clinical development, we sought to identify ATM inhibitors with a low predicted clinical dose (<50 mg) and focused on strategies to increase both ATM potency and predicted human pharmacokinetic half-life (predominantly through the increase of volume of distribution). These efforts resulted in the discovery of 64 (AZD0156), an exceptionally potent and selective inhibitor of ATM based on an imidazo[4,5- c]quinolin-2-one core. 64 has good preclinical phamacokinetics, a low predicted clinical dose, and a high maximum absorbable dose. 64 has been shown to potentiate the efficacy of the approved drugs irinotecan and olaparib in disease relevant mouse models and is currently undergoing clinical evaluation with these agents.
Assuntos
Proteínas Mutadas de Ataxia Telangiectasia/antagonistas & inibidores , Desenho de Fármacos , Piridinas/farmacocinética , Quinolinas/farmacocinética , Quinolonas/farmacologia , Quinolonas/farmacocinética , Administração Oral , Proteínas Mutadas de Ataxia Telangiectasia/química , Proteínas Mutadas de Ataxia Telangiectasia/metabolismo , Disponibilidade Biológica , Humanos , Concentração Inibidora 50 , Modelos Moleculares , Conformação Proteica , Inibidores de Proteínas Quinases , Piridinas/administração & dosagem , Piridinas/química , Quinolinas/administração & dosagem , Quinolinas/química , Quinolonas/administração & dosagem , Quinolonas/química , Relação Estrutura-Atividade , Especificidade por SubstratoRESUMO
A novel series of 3-quinoline carboxamides has been discovered and optimized as selective inhibitors of the ataxia telangiectasia mutated (ATM) kinase. From a modestly potent HTS hit (4), we identified molecules such as 6-[6-(methoxymethyl)-3-pyridinyl]-4-{[(1R)-1-(tetrahydro-2H-pyran-4-yl)ethyl]amino}-3-quinolinecarboxamide (72) and 7-fluoro-6-[6-(methoxymethyl)pyridin-3-yl]-4-{[(1S)-1-(1-methyl-1H-pyrazol-3-yl)ethyl]amino}quinoline-3-carboxamide (74) as potent and highly selective ATM inhibitors with overall ADME properties suitable for oral administration. 72 and 74 constitute excellent oral tools to probe ATM inhibition in vivo. Efficacy in combination with the DSB-inducing agent irinotecan was observed in a disease relevant model.
Assuntos
Antineoplásicos/farmacologia , Proteínas Mutadas de Ataxia Telangiectasia/antagonistas & inibidores , Descoberta de Drogas , Inibidores de Proteínas Quinases/farmacologia , Quinolinas/farmacologia , Administração Oral , Animais , Antineoplásicos/administração & dosagem , Antineoplásicos/química , Proteínas Mutadas de Ataxia Telangiectasia/metabolismo , Proliferação de Células/efeitos dos fármacos , Relação Dose-Resposta a Droga , Humanos , Camundongos , Camundongos Nus , Estrutura Molecular , Neoplasias Experimentais/tratamento farmacológico , Neoplasias Experimentais/patologia , Inibidores de Proteínas Quinases/administração & dosagem , Inibidores de Proteínas Quinases/química , Quinolinas/administração & dosagem , Quinolinas/química , Relação Estrutura-Atividade , Ensaios Antitumorais Modelo de XenoenxertoRESUMO
Optimization of cellular lipophilic ligand efficiency (LLE) in a series of 2-anilino-pyrimidine IGF-1R kinase inhibitors led to the identification of novel 2-(pyrazol-4-ylamino)-pyrimidines with improved physicochemical properties. Replacement of the imidazo[1,2-a]pyridine group of the previously reported inhibitor 3 with the related pyrazolo[1,5-a]pyridine improved IGF-1R cellular potency. Substitution of the amino-pyrazole group was key to obtaining excellent kinase selectivity and pharmacokinetic parameters suitable for oral dosing, which led to the discovery of (2R)-1-[4-(4-{[5-chloro-4-(pyrazolo[1,5-a]pyridin-3-yl)-2-pyrimidinyl]amino}-3,5-dimethyl-1H-pyrazol-1-yl)-1-piperidinyl]-2-hydroxy-1-propanone (AZD9362, 28), a novel, efficacious inhibitor of IGF-1R.
Assuntos
Descoberta de Drogas , Inibidores de Proteínas Quinases/farmacologia , Pirazóis/farmacologia , Piridinas/farmacologia , Receptor IGF Tipo 1/antagonistas & inibidores , Administração Oral , Animais , Linhagem Celular , Cristalografia por Raios X , Relação Dose-Resposta a Droga , Feminino , Camundongos , Camundongos Nus , Modelos Moleculares , Estrutura Molecular , Inibidores de Proteínas Quinases/administração & dosagem , Inibidores de Proteínas Quinases/síntese química , Inibidores de Proteínas Quinases/química , Pirazóis/síntese química , Pirazóis/química , Piridinas/síntese química , Piridinas/química , Receptor IGF Tipo 1/metabolismo , Relação Estrutura-AtividadeRESUMO
A novel estrogen receptor down-regulator, 7-hydroxycoumarin (5, SS5020), has been reported with antitumor effects against chemically induced mammary tumors. Here, we report on our own investigation of 7-hydroxycoumarins as potential selective estrogen receptor down-regulators, which led us to the discovery of potent down-regulating antagonists, such as 33. Subsequent optimization and removal of the 7-hydroxy group led to coumarin 59, which had increased potency and improved rat bioavailability relative to SS5020.
Assuntos
Receptor alfa de Estrogênio/metabolismo , Umbeliferonas/química , Umbeliferonas/farmacologia , Administração Oral , Animais , Linhagem Celular Tumoral , Cumarínicos/química , Cumarínicos/farmacocinética , Cumarínicos/farmacologia , Regulação para Baixo/efeitos dos fármacos , Receptor alfa de Estrogênio/análise , Humanos , Simulação de Acoplamento Molecular , Ratos , Umbeliferonas/farmacocinéticaRESUMO
Following the discovery of imidazopyridine 1 as a potent IGF-1R tyrosine kinase inhibitor, the aniline part has been modified with the aim to optimize the properties of this series. The structure-activity relationships against IGF-1R kinase activity as well as inhibition of the hERG ion channel are discussed.
Assuntos
Compostos de Anilina/farmacologia , Inibidores de Proteínas Quinases/farmacologia , Piridinas/farmacologia , Receptor IGF Tipo 1/antagonistas & inibidores , Compostos de Anilina/síntese química , Compostos de Anilina/química , Descoberta de Drogas , Canais de Potássio Éter-A-Go-Go/antagonistas & inibidores , Humanos , Estrutura Molecular , Inibidores de Proteínas Quinases/síntese química , Inibidores de Proteínas Quinases/química , Piridinas/síntese química , Piridinas/química , Estereoisomerismo , Relação Estrutura-AtividadeRESUMO
We disclose a novel series of insulin-like growth factor-1 receptor kinase inhibitors based on the 3-(pyrimidin-4-yl)-imidazo[1,2-a]pyridine scaffold. The influence on the inhibitory activity of substitution on the imidazopyridine and at the C5 position of the pyrimidine is discussed. In the course of this optimization, we discovered a potent and selective inhibitor with suitable pharmacokinetics for oral administration.
Assuntos
Descoberta de Drogas , Inibidores de Proteínas Quinases/farmacologia , Piridinas/farmacologia , Receptor IGF Tipo 1/antagonistas & inibidores , Animais , Cães , Humanos , Camundongos , Estrutura Molecular , Inibidores de Proteínas Quinases/síntese química , Inibidores de Proteínas Quinases/química , Piridinas/síntese química , Piridinas/química , Ratos , Estereoisomerismo , Relação Estrutura-Atividade , Distribuição TecidualRESUMO
Optimization of our bis-anilino-pyrimidine series of EphB4 kinase inhibitors led to the discovery of compound 12 which incorporates a key m-hydroxymethylene group on the C4 aniline. 12 displays a good kinase selectivity profile, good physical properties and pharmacokinetic parameters, suggesting it is a suitable candidate to investigate the therapeutic potential of EphB4 kinase inhibitors.
Assuntos
Compostos de Anilina/química , Álcool Benzílico/química , Inibidores de Proteínas Quinases/química , Pirimidinas/química , Receptor EphB4/antagonistas & inibidores , Administração Oral , Compostos de Anilina/síntese química , Compostos de Anilina/farmacocinética , Animais , Álcool Benzílico/síntese química , Álcool Benzílico/farmacocinética , Sítios de Ligação , Simulação por Computador , Cristalografia por Raios X , Avaliação Pré-Clínica de Medicamentos , Camundongos , Camundongos Nus , Inibidores de Proteínas Quinases/síntese química , Inibidores de Proteínas Quinases/farmacocinética , Pirimidinas/síntese química , Pirimidinas/farmacocinética , Receptor EphB4/metabolismo , Relação Estrutura-AtividadeRESUMO
Starting from the initial bis-anilinopyrimidine 1, good potency against EphB4 was retained when benzodioxole at C-4 was replaced by an indazole. The key interactions of the indazole with the protein were characterised by crystallographic studies. Further optimisation led to compound 20, a potent inhibitor of the EphB4 and Src kinases with good pharmacokinetics in various preclinical species and high fraction unbound in plasma. Compound 20 may be used as a tool for evaluating the potential of EphB4 kinase inhibitors in vivo.
Assuntos
Benzodioxóis/síntese química , Benzodioxóis/farmacologia , Inibidores de Proteínas Quinases/síntese química , Inibidores de Proteínas Quinases/farmacologia , Proteínas Tirosina Quinases/antagonistas & inibidores , Receptor EphB4/antagonistas & inibidores , Animais , Benzodioxóis/farmacocinética , Células CHO , Cricetinae , Cricetulus , Cristalografia por Raios X , Cães , Feminino , Masculino , Camundongos , Camundongos Nus , Modelos Moleculares , Fosforilação , Inibidores de Proteínas Quinases/farmacocinética , Ratos , Ratos Wistar , Relação Estrutura-Atividade , Especificidade por Substrato , Quinases da Família src/antagonistas & inibidoresRESUMO
We have identified a new series of C-5 substituted indazolylaminoquinazolines as potent erbB2 kinase inhibitors. The lead compound 22 showed excellent in vitro potency, good physical properties, acceptable oral pharmacokinetics in rat and dog, and low human in vitro clearance. It showed at least equivalent activity dose for dose compared to lapatinib in various erbB2- or EGFR-driven xenograft models after chronic oral administration.
Assuntos
Antineoplásicos/farmacologia , Receptores ErbB/antagonistas & inibidores , Indazóis/farmacologia , Neoplasias Experimentais/tratamento farmacológico , Inibidores de Proteínas Quinases/farmacologia , Quinazolinas/farmacologia , Receptor ErbB-2/antagonistas & inibidores , Administração Oral , Animais , Antineoplásicos/síntese química , Neoplasias da Mama/tratamento farmacológico , Linhagem Celular Tumoral , Proliferação de Células/efeitos dos fármacos , Cães , Fator de Crescimento Epidérmico/farmacologia , Canais de Potássio Éter-A-Go-Go , Feminino , Hepatócitos/citologia , Hepatócitos/efeitos dos fármacos , Hepatócitos/metabolismo , Humanos , Indazóis/síntese química , Queratinócitos/citologia , Queratinócitos/efeitos dos fármacos , Queratinócitos/metabolismo , Lapatinib , Masculino , Taxa de Depuração Metabólica , Camundongos , Camundongos Nus , Camundongos SCID , Microssomos/efeitos dos fármacos , Estrutura Molecular , Fosforilação/efeitos dos fármacos , Inibidores de Proteínas Quinases/síntese química , Quinazolinas/síntese química , Ratos , Ratos Wistar , Taxa de Sobrevida , Ensaios Antitumorais Modelo de XenoenxertoRESUMO
Novel 4-anilino-1H-pyrazolo[3,4-d]pyrimidines have been synthesized and evaluated in vitro for erbB2 and EGFR kinase inhibition. A representative compound displaying oral bioavailability in rat and dog illustrates the potential of this series to provide orally active erbB2 inhibitors.
Assuntos
Inibidores de Proteínas Quinases/antagonistas & inibidores , Pirazóis/síntese química , Pirazóis/farmacologia , Pirimidinas/síntese química , Pirimidinas/farmacologia , Receptores Proteína Tirosina Quinases/antagonistas & inibidores , Receptor ErbB-2/antagonistas & inibidores , Animais , Técnicas de Química Combinatória , Cães , Desenho de Fármacos , Estrutura Molecular , Pirazóis/administração & dosagem , Pirazóis/química , Pirimidinas/administração & dosagem , Pirimidinas/química , RatosRESUMO
Starting from initial lead 1 containing a basic 5-substituent, optimisation of the glycolamide-derived neutral 5-substituent led to potent inhibitors of erbB2 with good pharmacokinetics. Representative compounds 19 and 21 inhibited phosphorylation of erbB2 in a mouse BT474C xenograft model after oral administration.
Assuntos
Inibidores de Proteínas Quinases/farmacologia , Quinazolinas/farmacologia , Receptor ErbB-2/antagonistas & inibidores , Administração Oral , Animais , Linhagem Celular , Espectroscopia de Ressonância Magnética , Camundongos , Transplante de Neoplasias , Fosforilação , Inibidores de Proteínas Quinases/administração & dosagem , Inibidores de Proteínas Quinases/química , Inibidores de Proteínas Quinases/farmacocinética , Quinazolinas/administração & dosagem , Quinazolinas/química , Quinazolinas/farmacocinética , Relação Estrutura-AtividadeRESUMO
[reaction: see text] Two new unsymmetrical 1,2,4,5-tetrazines, 3-methylsulfinyl-6-methylthio-1,2,4,5-tetrazine (4) and 3-(benzyloxycarbonyl)amino-6-methylsulfinyl-1,2,4,5-tetrazine (5), were prepared, and the scope of their participation in intermolecular inverse electron demand Diels-Alder reactions was defined. As anticipated, sulfoxides 4 and 5 (4 > 5) display a reactivity that is substantially greater than that of their corresponding sulfides (2 and 3), being derived from their enhanced electron-deficient character and resulting in a wider range of potential dienophile choices or the use of milder reaction conditions. The cycloaddition reactions were expectedly regioselective, typically producing a single cycloadduct, ensuring their synthetic utility, but both were found to proceed with a regioselectivity opposite what would be anticipated and complementary to that observed with 2 and 3.