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Dose-response relationships and tegumental surface alterations in Opisthorchis viverrini following treatment with mefloquine in vivo and in vitro

Keiser, J. and Odermatt, P. and Tesana, S.. (2009) Dose-response relationships and tegumental surface alterations in Opisthorchis viverrini following treatment with mefloquine in vivo and in vitro. Parasitology research : Organ der Deutschen Gesellschaft für Parasitologie, Vol. 105, H. 1. S. 261-266.

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Official URL: http://edoc.unibas.ch/dok/A5843191

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Abstract

The treatment and control of opisthorchiasis relies on a single drug, praziquantel; hence, there is a need to develop novel opisthorchicidal drugs. We investigated the in vitro and in vivo activity of the antimalarial mefloquine against Opisthorchis viverrini. Hamsters infected with O. viverrini for 2 weeks (juvenile infections) and 4 weeks (adult infections) were treated orally with single 200-400-mg/kg oral mefloquine. Worm burden reductions were assessed against untreated control hamsters. Worms were incubated in the presence of 10 and 100 microg/ml mefloquine. Scanning electron microscopy was used to examine adult O. viverrini after recovery from hamsters and following in vitro incubation. A single oral dose of 300-mg/kg mefloquine resulted in worm burden reductions of 88.5% (juvenile infection) and 96.0% (adult infections), respectively. Incubation with 10 and 100 microg/ml mefloquine resulted in rapid death of O. viverrini. Extensive tegumental disruption such as blebbing, sloughing, and furrowing was seen on worms incubated in vitro and on flukes recovered 48 h posttreatment. In conclusion, we have documented promising opisthorchicidal activities in hamsters and in vitro with the tegument being an important drug target. Proof-of-concept studies with mefloquine could be considered in opisthorchiasis patients
Faculties and Departments:03 Faculty of Medicine > Bereich Medizinische Fächer (Klinik) > Klinische Pharmakologie
03 Faculty of Medicine > Departement Klinische Forschung > Bereich Medizinische Fächer (Klinik) > Klinische Pharmakologie
09 Associated Institutions > Swiss Tropical and Public Health Institute (Swiss TPH) > Department of Medical Parasitology and Infection Biology > Helminth Drug Development (Keiser)
09 Associated Institutions > Swiss Tropical and Public Health Institute (Swiss TPH) > Department of Epidemiology and Public Health (EPH) > Eco System Health Sciences > Health Impact Assessment (Utzinger)
UniBasel Contributors:Keiser, Jennifer and Odermatt, Peter
Item Type:Article, refereed
Bibsysno:Link to catalogue
Publisher:Springer-Verlag
ISSN:0932-0113
Note:Publication type according to Uni Basel Research Database: Journal article
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Last Modified:01 Mar 2013 11:11
Deposited On:14 Sep 2012 06:42

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