The efficacy of SP187 (UV-4), the active free base component of UV-4B, and UV-5, the most potent iminosugar tested in vitro, is first assessed using a mouse model of EBOV infection. In this study, C57Bl/6 mice are administered 10 or 100 mg/kg of SP187 or UV-5 via oral gavage or IP injection. Dosing started ~1h before infection with ~1000 pfu of mouse-adapted EBOV and is repeated BID for 10 days at approximately 12 hour intervals for UV-5 or TID at approximately 8 hour intervals for SP187. The selected doses and schedule are based on tolerability studies in nave mice. No efficacy is observed in the iminosugar treated mice as compared to the vehicle control[1].
