<i>In vivo</i> MMV665807 treatment in the secondary alveolar echinococcosis mouse model.

Abstract

<p>(A) Balb/c mice were i.p. infected with metacestodes obtained from <i>in vitro</i> cultures. After 6 weeks of infection, mice were randomly allocated into 4 groups of 6 mice and treated p.o. during 4 weeks. The different treatment groups were: control (no treatment), oil (p.o. gavage of corn oil, 5 days per week), albendazole (ABZ, p.o. gavage of 200 mg/kg ABZ in corn oil, 5 days per week), MMV665807 (p.o. gavage of 100 mg/kg MMV665807 in corn oil, 5 days per week). At the endpoint, mice were euthanized and parasite weight determined. The only effective treatment reducing parasite weight significantly was ABZ. (B) in a second experiment, mice were infected accordingly, and i.p. injection treatment started after 2 weeks of infection. The treatment groups of 8 randomly allocated mice were as follows: control (i.p. injection of DMSO three times per week and p.o. gavage of corn oil 5 days per week), ABZ (i.p. injection of DMSO three times per week and p.o. gavage of 200 mg/kg ABZ in corn oil 5 days per week), MMV665807 (i.p. injection of 100 mg/kg MMV665807 three times per week and p.o. gavage of corn oil 5 days per week) and MMV665807/ABZ (i.p. injection of 100 mg/kg MMV665807 three times per week and p.o. gavage of ABZ in corn oil 5 days per week). After euthanasia, parasite weight was determined. Effective were treatments of ABZ and MMV665807/ABZ. The drug MMV665807 did not lead to any reduction in parasite growth. P values shown in (A) and (B) were calculated by the non-parametric Wilcoxon signed-rank test with Bonferroni-adjustment.</p