KDU731, an orally active C. parvum PI4K inhibitor with an IC50 value of 25 nM, blocks Cryptosporidium infection in vitro and in vivo[1][2]. KDU731 is a promising drug candidate for the treatment of diarrhea caused by Cryptosporidium and meets a broad range of safety[2].
KDU731 (orally administration; 7 or 10mg/kg; 16 days) has potent activity against Cryptosporidium in immunocompromised IFN-γ KO mice and dramatically reduces oocyst shedding[2].KDU731 (orally administration; 5 mg/kg; every 12 hours for 7 days) is tolerated in all calves, and treated calves shed significantly fewer oocysts than vehicle treated calves in their stool[2]. Animal Model: 6-8 week old C57BL/6 IFN-γ-knockout mice with 10,000 oocysts[1]
[1]. Ward HD, et al. New Tools for Cryptosporidium Lead to New Hope for Cryptosporidiosis. Trends Parasitol. 2017 Sep;33(9):662-664. [2]. Manjunatha UH, et al. A Cryptosporidium PI(4)K inhibitor is a drug candidate for cryptosporidiosis. Nature. 2017 Jun 15;546(7658):376-380.