Exploring in vitro and in vivo Hsp90 inhibitors activity against human protozoan parasites
作者:Giuseppe Giannini、Gianfranco Battistuzzi
DOI:10.1016/j.bmcl.2014.12.048
日期:2015.2
A set of compounds, previously selected as potent Hsp90 alpha inhibitors, has been studied on a panel of human parasites. 5-Aryl-3,4-isoxazolediamide derivatives (1) were active against two protozoa, Trypanosoma brucei rhodesiense and Plasmodium falciparum, with a good tolerability toward cytotoxicity on non-malignant L6 rat myoblast cell line, unlike the 1,5-diaryl,4-carboxamides-1,2,3-triazole derivatives (2) which, while showing a single-digit nM range activity against the same protozoa, were also highly cytotoxic on L6 cells. In a subsequent in vivo study, two isoxazolediamide derivatives, 1a and 1b, were very efficacious on the sleeping sickness-causing agent with a clear parasitaemia during treatment. These data, however, showed that not all protozoa are sensitive to Hsp90 inhibitors, as well as not all Hsp90 inhibitors are equally active on parasites. (C) 2014 Elsevier Ltd. All rights reserved.