RESUMEN
The success of hit-finding campaigns relies on many factors, including the quality and diversity of the set of compounds that is selected for screening. This paper presents a generalized workflow that guides compound selections from large compound archives with opportunities to bias the selections with available knowledge in order to improve hit quality while still effectively sampling the accessible chemical space. An optional flag in the workflow supports an explicit complement design function where diversity selections complement a given core set of compounds. Results from three project applications as well as a literature case study exemplify the effectiveness of the approach, which is available as a KNIME workflow named Biased Complement Diversity (BCD).
Asunto(s)
Descubrimiento de Drogas/métodos , Animales , Antibacterianos/farmacología , Antimaláricos/farmacología , Evaluación Preclínica de Medicamentos/métodos , Bacterias Gramnegativas/efectos de los fármacos , Infecciones por Bacterias Gramnegativas/tratamiento farmacológico , Ensayos Analíticos de Alto Rendimiento/métodos , Humanos , Malaria Falciparum/tratamiento farmacológico , Plasmodium falciparum/efectos de los fármacos , Mapas de Interacción de Proteínas/efectos de los fármacos , Bibliotecas de Moléculas Pequeñas/farmacología , Flujo de TrabajoRESUMEN
Utilizing the already described 3,4-bi-aryl pyridine series as a starting point, incorporation of a second ring system with a hydrogen bond donor and additional hydrophobic contacts yielded the azaindole series which exhibited potent, picomolar RSK2 inhibition and the most potent in vitro target modulation seen thus far for a RSK inhibitor. In the context of the more potent core, several changes at the phenol moiety were assessed to potentially find a tool molecule appropriate for in vivo evaluation.
Asunto(s)
Inhibidores de Proteínas Quinasas/síntesis química , Inhibidores de Proteínas Quinasas/farmacología , Animales , Cromatografía Liquida , Diseño de Fármacos , Humanos , Espectrometría de Masas , Fenoles/farmacología , Inhibidores de Proteínas Quinasas/química , Espectroscopía de Protones por Resonancia Magnética , Relación Estructura-ActividadRESUMEN
The discovery of a highly potent and selective small molecule inhibitor 9 for in vitro target validation of MNK1/2 kinases is described. The aminopyrazine benzimidazole series was derived from an HTS hit and optimized by utilization of a docking model, conformation analysis, and binding pocket comparison against antitargets.
Asunto(s)
Péptidos y Proteínas de Señalización Intracelular/antagonistas & inhibidores , Inhibidores de Proteínas Quinasas/química , Inhibidores de Proteínas Quinasas/farmacología , Proteínas Serina-Treonina Quinasas/antagonistas & inhibidores , Sitios de Unión , Células CACO-2/efectos de los fármacos , Diseño de Fármacos , Ensayos Analíticos de Alto Rendimiento/métodos , Humanos , Péptidos y Proteínas de Señalización Intracelular/química , Péptidos y Proteínas de Señalización Intracelular/metabolismo , Simulación del Acoplamiento Molecular , Permeabilidad , Proteínas Serina-Treonina Quinasas/química , Proteínas Serina-Treonina Quinasas/metabolismo , Solubilidad , Relación Estructura-ActividadRESUMEN
While the p90 ribosomal S6 kinase (RSK) family has been implicated in multiple tumor cell functions, the full understanding of this kinase family has been restricted by the lack of highly selective inhibitors. A bis-phenol pyrazole was identified from high-throughput screening as an inhibitor of the N-terminal kinase of RSK2. Structure-based drug design using crystallography, conformational analysis, and scaffold morphing resulted in highly optimized difluorophenol pyridine inhibitors of the RSK kinase family as demonstrated cellularly by the inhibition of YB1 phosphorylation. These compounds provide for the first time in vitro tools with an improved selectivity and potency profile to examine the importance of RSK signaling in cancer cells and to fully evaluate RSK as a therapeutic target.
Asunto(s)
Pirazoles/química , Piridinas/química , Pirimidinas/química , Proteínas Quinasas S6 Ribosómicas 90-kDa/antagonistas & inhibidores , Animales , Línea Celular , Cristalografía por Rayos X , Humanos , Masculino , Ratones , Modelos Moleculares , Fosforilación , Conformación Proteica , Pirazoles/síntesis química , Pirazoles/farmacología , Piridinas/síntesis química , Piridinas/farmacología , Pirimidinas/síntesis química , Pirimidinas/farmacología , Ratas Sprague-Dawley , Transducción de Señal , Relación Estructura-Actividad , Proteína 1 de Unión a la Caja Y/metabolismoRESUMEN
2-Amino-7-substituted benzoxazole analogs were identified by HTS as inhibitors of RSK2. Molecular modeling and medicinal chemistry techniques were employed to explore the SAR for this series with a focus of improving in vitro and target modulation potency and physicochemical properties.