Structurally Simple Inhibitors of Lanosterol 14α-Demethylase Are Efficacious In a Rodent Model of Acute Chagas Disease
作者:Praveen Kumar Suryadevara、Srinivas Olepu、Jeffrey W. Lockman、Junko Ohkanda、Mandana Karimi、Christophe L. M. J. Verlinde、James M. Kraus、Jan Schoepe、Wesley C. Van Voorhis、Andrew D. Hamilton、Frederick S. Buckner、Michael H. Gelb
DOI:10.1021/jm900030h
日期:2009.6.25
We report structure-activity studies of a large number of dialkyl imidazoles as inhibitors of Trypanosoma cruzi lanosterol-14 alpha-demethylase (L14DM). The compounds have a simple structure compared to posaconazole, another L14DM inhibitor that is an anti-Chagas drug candidate. Several compounds display potency for killing T cruzi amastigotes in vitro with values of EC50 in the 0.4-10 nM range. Two compounds were selected for efficacy studies in a mouse model of acute Chagas disease. At oral doses of 20-50 mg/kg given after establishment of parasite infection, the compounds reduced parasitemia in the blood to undetectable levels, and analysis of remaining parasites by PCR revealed a lack of parasites in the majority of animals. These dialkyl imidazoles are substantially less expensive to produce than posaconazole and are appropriate for further development toward an anti-Chagas disease clinical candidate.