GSK-2269557 has low oral bioavailability (F=2%) and in vivo clearance of 28 mL/min/kg but has a high volume of distribution of 6.3 L/kg. GSK-2269557 induces concentration-dependent increases in QT interval and Tp-e at 0.3 and 1 μM (1 and 0.5 Hz) and an increase in QRS at 1 μM (2 Hz), however, no treatment-related torsades de pointes (TdP) arrhythmias are observed. In a disease relevant brown Norway rat acute OVA model of Th2 driven lung inflammation, GSK-2269557 is shown to protect against eosinophil recruitment with an ED50 of 67 μg/kg and dose-dependently reduces recruitment of all leukocyte subpopulations and IL-13 in the lungs.
|Animal models||Sprague Dawley male rats|
|Formulation||DMSO/PEG200/water (5:45:50 v/v/v)|
|Dosages||3 mg/kg; IV:1 mg/kg|
|Body Surface Area (m2)||0.007||0.025||0.15||0.05||0.02||0.5|
|Animal A (mg/kg) = Animal B (mg/kg) multiplied by||Animal B Km|
|Animal A Km|
For example, to modify the dose of resveratrol used for a mouse (22.4 mg/kg) to a dose based on the BSA for a rat, multiply 22.4 mg/kg by the Km factor for a mouse and then divide by the Km factor for a rat. This calculation results in a rat equivalent dose for resveratrol of 11.2 mg/kg.
|Solubility||88 mg/mL in DMSO|
Optimization of Novel Indazoles as Highly Potent and Selective Inhibitors of Phosphoinositide 3-Kinase δ for the Treatment of Respiratory Disease.
Down K, et al. J Med Chem. 2015 Sep 24;58(18):7381-99. PMID: 26301626.
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