RESUMEN
Several P4 domain derivatives of the general d-phenylglycinamide-based scaffold (2) were synthesized and evaluated for their ability to bind to the serine protease factor Xa. Some of the more potent compounds were evaluated for their anticoagulant effects in vitro. A select subset containing various P1 indole constructs was further evaluated for their pharmacokinetic properties after oral administration to rats.
Asunto(s)
Antitrombina III/síntesis química , Antitrombina III/farmacología , Glicina/análogos & derivados , Anticoagulantes/síntesis química , Anticoagulantes/química , Anticoagulantes/farmacología , Antitrombina III/química , Cristalografía por Rayos X , Factor Xa/química , Factor Xa/metabolismo , Glicina/síntesis química , Glicina/química , Glicina/farmacología , Humanos , Modelos Moleculares , Estructura Molecular , Unión Proteica , Relación Estructura-ActividadRESUMEN
SAR about the B-ring of a series of N(2)-aroyl anthranilamide factor Xa (fXa) inhibitors is described. B-ring o-aminoalkylether and B-ring p-amine probes of the S1' and S4 sites, respectively, afforded picomolar fXa inhibitors that performed well in in vitro anticoagulation assays.
Asunto(s)
Antitrombina III/síntesis química , Inhibidores del Factor Xa , Colorantes Fluorescentes/farmacología , ortoaminobenzoatos/farmacología , Anticoagulantes/química , Antitrombina III/química , Sitios de Unión , Química Farmacéutica/métodos , Relación Dosis-Respuesta a Droga , Diseño de Fármacos , Evaluación Preclínica de Medicamentos , Colorantes Fluorescentes/síntesis química , Humanos , Cinética , Modelos Químicos , Conformación Molecular , Relación Estructura-Actividad , ortoaminobenzoatos/síntesis químicaRESUMEN
The authors show by illustration that procedures used to validate the reliability of single-concentration high-throughput screens such as the signal window and Z' factor do not ensure sufficient reliability in potency estimates from concentration response assays. They develop the minimum significant ratio as a statistical parameter to characterize the fold change between 2 compounds run in the same experiment that can be considered a real difference and use this parameter to characterize the reliability of the assay. They adapt methods described by Bland and Altman to develop a simple set of 2 experiments to estimate the minimum significant ratio and show that this protocol can identify assays that lack reproducibility. The methods are then extended to validate the equivalency of the same assay run by multiple laboratories.
Asunto(s)
Modelos Estadísticos , Reproducibilidad de los Resultados , Factor Xa/metabolismo , Inhibidores del Factor XaRESUMEN
Several non-amidino S1 derivatives of the 1,2-diaminobenzene-based scaffold (4) were synthesized and evaluated for their ability to bind to the active site and inhibit the human protease factor Xa. A subset of these compounds were also evaluated for their anticoagulant effects in human plasma as measured by prothrombin time (PT).
