Metabolic pathways of anthelmintic drug monepantel in sheep and in its parasite (Haemonchus contortus)
Language English Country England, Great Britain Media print-electronic
Document type Journal Article, Research Support, Non-U.S. Gov't
PubMed
24616229
DOI
10.1002/dta.1630
Knihovny.cz E-resources
- Keywords
- UHPLC-MS, amino-acetonitrile derivatives, biotransformation, mass spectrometry, nematodes,
- MeSH
- Aminoacetonitrile analogs & derivatives analysis metabolism MeSH
- Anthelmintics analysis metabolism MeSH
- Haemonchus drug effects metabolism MeSH
- Sheep MeSH
- Tandem Mass Spectrometry methods MeSH
- Chromatography, High Pressure Liquid methods MeSH
- Animals MeSH
- Check Tag
- Male MeSH
- Animals MeSH
- Publication type
- Journal Article MeSH
- Research Support, Non-U.S. Gov't MeSH
- Names of Substances
- Aminoacetonitrile MeSH
- Anthelmintics MeSH
- monepantel MeSH Browser
Monepantel (MOP) is a new anthelmintic drug intended for the treatment and control of gastrointestinal roundworms (nematodes) infection and associated disease in sheep. The aim of our study was to find out metabolic pathways of MOP in sheep in vivo and in its parasite Haemonchus contortus ex vivo. MOP biotransformation in two H. contortus strains with different sensitivity to anthelmintics was also compared. Ultra high-performance liquid chromatography with tandem mass spectrometry (UHPLC-MS/MS) technique is used for the identification of MOP metabolites in ovine urine, faeces, and nematodes. MOP biotransformation study in sheep in vivo led to the identification of 13 MOP metabolites; 7 of them have not been described previously in in vitro study. The study of MOP biotransformation in H. contorus ex vivo reveals four MOP metabolites. The nitrile hydrolysis as a new biotransformation pathway in helminths ex vivo is reported here for the first time. Unlike sheep, H. contorus nematodes are not able to metabolize MOP via phase II biotransformation. Nematodes of resistant White river (WR) strain form more types of MOP metabolites than nematodes of sensitive inbred susceptible Edinburgh (ISE) strain. Based on obtained results, schemes of metabolic pathways of MOP in sheep and nematodes are proposed.
References provided by Crossref.org
Biotransformation of anthelmintics in nematodes in relation to drug resistance
