RESUMEN
Inhibition of the bromodomain and extra-terminal (BET) family of adaptor proteins is an attractive strategy for targeting transcriptional regulation of key oncogenes, such as c-MYC. Starting with the screening hit 1, a combination of structure-activity relationship and protein structure-guided drug design led to the discovery of a differently oriented carbazole 9 with favorable binding to the tryptophan, proline, and phenylalanine (WPF) shelf conserved in the BET family. Identification of an additional lipophilic pocket and functional group optimization to optimize pharmacokinetic (PK) properties culminated in the discovery of 18 (BMS-986158) with excellent potency in binding and functional assays. On the basis of its favorable PK profile and robust in vivo activity in a panel of hematologic and solid tumor models, BMS-986158 was selected as a candidate for clinical evaluation.
Asunto(s)
Antineoplásicos/farmacología , Carbazoles/farmacología , Descubrimiento de Drogas , Fenilalanina/farmacología , Prolina/farmacología , Triptófano/farmacología , Administración Oral , Antineoplásicos/administración & dosificación , Antineoplásicos/química , Carbazoles/administración & dosificación , Carbazoles/química , Proteínas de Ciclo Celular/antagonistas & inhibidores , Proteínas de Ciclo Celular/metabolismo , Relación Dosis-Respuesta a Droga , Humanos , Estructura Molecular , Fenilalanina/administración & dosificación , Fenilalanina/química , Prolina/administración & dosificación , Prolina/química , Relación Estructura-Actividad , Factores de Transcripción/antagonistas & inhibidores , Factores de Transcripción/metabolismo , Triptófano/administración & dosificación , Triptófano/químicaRESUMEN
Structure-activity relationships in a series of (2-oxo-1,4-benzodiazepin-3-yl)-succinamides identified highly potent inhibitors of γ-secretase mediated signaling of Notch1/2/3/4 receptors. On the basis of its robust in vivo efficacy at tolerated doses in Notch driven leukemia and solid tumor xenograft models, 12 (BMS-906024) was selected as a candidate for clinical evaluation.
RESUMEN
This Letter describes synthesis, SAR, and biological activity of (2-oxo-1,4-benzodiazepin-3-yl)-succinamides as inhibitors of γ-secretase mediated signaling of Notch receptors. Optimization of this series led to the identification of BMS-871 (compound 30) which displayed robust in vivo efficacy in Notch-dependent leukemia and solid tumor xenograft models.
Asunto(s)
Antineoplásicos/administración & dosificación , Antineoplásicos/farmacología , Benzodiazepinonas/administración & dosificación , Benzodiazepinonas/farmacología , Receptores Notch/antagonistas & inhibidores , Administración Oral , Animales , Antineoplásicos/química , Benzodiazepinonas/química , Línea Celular Tumoral , Proliferación Celular/efectos de los fármacos , Relación Dosis-Respuesta a Droga , Ensayos de Selección de Medicamentos Antitumorales , Humanos , Ratones , Microsomas Hepáticos/efectos de los fármacos , Microsomas Hepáticos/metabolismo , Estructura Molecular , Neoplasias Experimentales/tratamiento farmacológico , Neoplasias Experimentales/metabolismo , Neoplasias Experimentales/patología , Receptores Notch/metabolismo , Relación Estructura-ActividadRESUMEN
A novel series of 4-[3,5-dioxo-11-oxa-4,9-diazatricyclo[5.3.1.0(2,6)]undec-4-yl]-2-trifluoromethyl-benzonitriles has been synthesized. The ability of these compounds to act as antagonists of the androgen receptor was investigated and several were found to have potent activity in vitro and in vivo.
Asunto(s)
Antineoplásicos/síntesis química , Nitrilos/química , Antineoplásicos/química , Antineoplásicos/uso terapéutico , Línea Celular Tumoral , Diseño de Fármacos , Humanos , Masculino , Nitrilos/síntesis química , Nitrilos/uso terapéutico , Neoplasias de la Próstata/tratamiento farmacológico , Receptores Androgénicos/metabolismo , Relación Estructura-ActividadRESUMEN
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.
Asunto(s)
Antineoplásicos/síntesis química , Carbamatos/síntesis química , Receptores ErbB/antagonistas & inhibidores , Receptor ErbB-2/antagonistas & inhibidores , Triazinas/síntesis química , Administración Oral , Animales , Antineoplásicos/farmacocinética , Antineoplásicos/farmacología , Disponibilidad Biológica , Carbamatos/farmacocinética , Carbamatos/farmacología , Línea Celular Tumoral , Perros , Ensayos de Selección de Medicamentos Antitumorales , Humanos , Macaca fascicularis , Ratones , Trasplante de Neoplasias , Estereoisomerismo , Relación Estructura-Actividad , Trasplante Heterólogo , Triazinas/farmacocinética , Triazinas/farmacologíaRESUMEN
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.
Asunto(s)
Química Farmacéutica/métodos , Receptores ErbB/química , Neoplasias/tratamiento farmacológico , Piperidinas/síntesis química , Pirroles/síntesis química , Receptor ErbB-2/química , Triazinas/síntesis química , Adenosina Trifosfato/metabolismo , Animales , Antineoplásicos/farmacología , Línea Celular Tumoral , Diseño de Fármacos , Ensayos de Selección de Medicamentos Antitumorales , Humanos , Concentración 50 Inhibidora , Insectos , Modelos Químicos , Trasplante de Neoplasias , Piperidinas/química , Piperidinas/farmacología , Pirroles/química , Pirroles/farmacología , Triazinas/química , Triazinas/farmacologíaRESUMEN
Novel C-5 substituted pyrrolotriazines were optimized for dual EGFR and HER2 protein tyrosine kinase inhibition. The lead compound exhibited promising oral efficacy in both EGFR and HER2 driven human tumor xenograft models. It is hypothesized that its C-5 morpholine side chain binds in the ribose phosphate portion of the ATP binding pocket.
Asunto(s)
Química Farmacéutica/métodos , Receptores ErbB/antagonistas & inhibidores , Pirroles/síntesis química , Receptor ErbB-2/antagonistas & inhibidores , Triazinas/síntesis química , Adenosina Trifosfato/química , Animales , Células CACO-2 , Diseño de Fármacos , Inhibidores Enzimáticos/farmacología , Humanos , Concentración 50 Inhibidora , Ratones , Trasplante de Neoplasias , Fosfatos/química , Pirroles/farmacología , Ribosa/química , Triazinas/farmacologíaRESUMEN
A novel series of 17beta-hydroxysteroid dehydrogenase type 3 (17beta-HSD3) inhibitors has been identified. These inhibitors, based on a dibenzazocine core, exhibited picomolar to low nanomolar inhibition of 17beta-HSD3 in cell-free enzymatic as well as in cell-based transcriptional reporter assays.
Asunto(s)
17-Hidroxiesteroide Deshidrogenasas/antagonistas & inhibidores , Azocinas , Inhibidores Enzimáticos , 17-Hidroxiesteroide Deshidrogenasas/metabolismo , Fosfatasa Alcalina/efectos de los fármacos , Fosfatasa Alcalina/metabolismo , Androstenodiona/metabolismo , Azocinas/síntesis química , Azocinas/química , Azocinas/farmacología , Inhibidores Enzimáticos/síntesis química , Inhibidores Enzimáticos/química , Inhibidores Enzimáticos/farmacología , Humanos , Modelos Moleculares , Estructura Molecular , Relación Estructura-Actividad , Testosterona/biosíntesisRESUMEN
The pyrrolo[2,1-f][1,2,4]triazine nucleus was identified as a novel kinase inhibitor template which effectively mimics the well-known quinazoline kinase inhibitor scaffold. Attachment of a 4-((3-chloro-4-fluorophenyl)amino) substituent to the template provided potent biochemical inhibitors of the tyrosine kinase activity of EGFR, as well as inhibition of cellular proliferation of the human colon tumor cell line DiFi. Attachment of a 4-((3-hydroxy-4-methylphenyl)amino) substituent provided potent inhibitors of VEGFR-2 which also showed effects on the VEGF-dependent proliferation of human umbilical vein endothelial cells. Biological activity was maintained with substitution at positions 5 or 6, but not 7, suggesting that the former positions are promising sites for introducing side chains which modulate physicochemical properties. Preliminary inhibition studies with varying ATP concentrations suggest that, like the quinazoline-based kinase inhibitors, the pyrrolotriazine-based inhibitors bind in the ATP pocket.
Asunto(s)
Receptores ErbB/antagonistas & inhibidores , Pirroles/síntesis química , Triazinas/síntesis química , Receptor 2 de Factores de Crecimiento Endotelial Vascular/antagonistas & inhibidores , División Celular/efectos de los fármacos , Células Cultivadas , Endotelio Vascular/citología , Endotelio Vascular/efectos de los fármacos , Receptores ErbB/química , Humanos , Imitación Molecular , Pirroles/química , Pirroles/farmacología , Quinazolinas/química , Relación Estructura-Actividad , Triazinas/química , Triazinas/farmacología , Venas Umbilicales/citología , Venas Umbilicales/efectos de los fármacos , Receptor 2 de Factores de Crecimiento Endotelial Vascular/químicaRESUMEN
N-Acyl-2-aminothiazoles with nonaromatic acyl side chains containing a basic amine were found to be potent, selective inhibitors of CDK2/cycE which exhibit antitumor activity in mice. In particular, compound 21 [N-[5-[[[5-(1,1-dimethylethyl)-2-oxazolyl]methyl]thio]-2-thiazolyl]-4-piperidinecarboxamide, BMS-387032], has been identified as an ATP-competitive and CDK2-selective inhibitor which has been selected to enter Phase 1 human clinical trials as an antitumor agent. In a cell-free enzyme assay, 21 showed a CDK2/cycE IC(50) = 48 nM and was 10- and 20-fold selective over CDK1/cycB and CDK4/cycD, respectively. It was also highly selective over a panel of 12 unrelated kinases. Antiproliferative activity was established in an A2780 cellular cytotoxicity assay in which 21 showed an IC(50) = 95 nM. Metabolism and pharmacokinetic studies showed that 21 exhibited a plasma half-life of 5-7 h in three species and moderately low protein binding in both mouse (69%) and human (63%) serum. Dosed orally to mouse, rat, and dog, 21 showed 100%, 31%, and 28% bioavailability, respectively. As an antitumor agent in mice, 21 administered at its maximum-tolerated dose exhibited a clearly superior efficacy profile when compared to flavopiridol in both an ip/ip P388 murine tumor model and in a s.c./i.p. A2780 human ovarian carcinoma xenograft model.
Asunto(s)
Antineoplásicos/síntesis química , Quinasas CDC2-CDC28/antagonistas & inhibidores , Oxazoles/síntesis química , Tiazoles/síntesis química , Animales , Antineoplásicos/farmacocinética , Antineoplásicos/farmacología , Quinasas CDC2-CDC28/metabolismo , Línea Celular Tumoral , Sistema Libre de Células , Cristalografía por Rayos X , Ciclina E/metabolismo , Quinasa 2 Dependiente de la Ciclina , Perros , Ensayos de Selección de Medicamentos Antitumorales , Estabilidad de Medicamentos , Humanos , Técnicas In Vitro , Ratones , Microsomas Hepáticos/metabolismo , Modelos Moleculares , Estructura Molecular , Trasplante de Neoplasias , Oxazoles/farmacocinética , Oxazoles/farmacología , Fosforilación , Ratas , Proteína de Retinoblastoma/metabolismo , Relación Estructura-Actividad , Tiazoles/farmacocinética , Tiazoles/farmacología , Trasplante HeterólogoRESUMEN
High throughput screening identified 2-acetamido-thiazolylthio acetic ester 1 as an inhibitor of cyclin-dependent kinase 2 (CDK2). Because this compound is inactive in cells and unstable in plasma, we have stabilized it to metabolic hydrolysis by replacing the ester moiety with a 5-ethyl-substituted oxazole as in compound 14. Combinatorial and parallel synthesis provided a rapid analysis of the structure-activity relationship (SAR) for these inhibitors of CDK2, and over 100 analogues with IC(50) values in the 1-10 nM range were rapidly prepared. The X-ray crystallographic data of the inhibitors bound to the active site of CDK2 protein provided insight into the binding modes of these inhibitors, and the SAR of this series of analogues was rationalized. Many of these analogues displayed potent and broad spectrum antiproliferative activity across a panel of tumor cell lines in vitro. In addition, A2780 ovarian carcinoma cells undergo rapid apoptosis following exposure to CDK2 inhibitors of this class. Mechanism of action studies have confirmed that the phosphorylation of CDK2 substrates such as RB, histone H1, and DNA polymerase alpha (p70 subunit) is reduced in the presence of compound 14. Further optimization led to compounds such as water soluble 45, which possesses a favorable pharmacokinetic profile in mice and demonstrates significant antitumor activity in vivo in several murine and human models, including an engineered murine mammary tumor that overexpresses cyclin E, the coactivator of CDK2.
Asunto(s)
Antineoplásicos/síntesis química , Bencenoacetamidas , Quinasas CDC2-CDC28 , Quinasas Ciclina-Dependientes/antagonistas & inhibidores , Inhibidores Enzimáticos/síntesis química , Oxazoles/síntesis química , Proteínas Serina-Treonina Quinasas/antagonistas & inhibidores , Tiazoles/síntesis química , Animales , Antineoplásicos/farmacocinética , Antineoplásicos/farmacología , Ciclo Celular/efectos de los fármacos , Técnicas Químicas Combinatorias , Cristalografía por Rayos X , Ciclina E/metabolismo , Quinasa 2 Dependiente de la Ciclina , ADN Polimerasa I/metabolismo , Ensayos de Selección de Medicamentos Antitumorales , Inhibidores Enzimáticos/farmacocinética , Inhibidores Enzimáticos/farmacología , Femenino , Histonas/metabolismo , Humanos , Masculino , Ratones , Ratones Endogámicos BALB C , Ratones Endogámicos DBA , Modelos Moleculares , Oxazoles/farmacocinética , Oxazoles/farmacología , Fosforilación , Unión Proteica , Proteína de Retinoblastoma/metabolismo , Relación Estructura-Actividad , Tiazoles/química , Tiazoles/farmacocinética , Tiazoles/farmacología , Células Tumorales CultivadasRESUMEN
A series of structurally novel small molecule inhibitors of human alpha-thrombin was prepared to elucidate their structure-activity relationships (SARs), selectivity and activity in vivo. BMS-189664 (3) is identified as a potent, selective, and orally active reversible inhibitor of human alpha-thrombin which is efficacious in vivo in a mouse lethality model, and at inhibiting both arterial and venous thrombosis in cynomolgus monkey models.