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The Scientific World Journal
Volume 2014, Article ID 936560, 9 pages
Research Article

The In Vitro Effect of Ivermectin on the Activity of Trehalose Synthesis Pathway Enzymes and Their mRNA Expression in the Muscle of Adult Female Ascaris suum (Nematoda)

Biochemistry Department, Faculty of Biology and Biotechnology, University of Warmia and Mazury, Oczapowski 1A Street, 10-719 Olsztyn, Poland

Received 10 July 2014; Accepted 21 August 2014; Published 27 October 2014

Academic Editor: Mehmet Yakup Arica

Copyright © 2014 Małgorzata Dmitryjuk et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


The in vitro effect of ivermectin lethal dose on the activity of trehalose-6-phosphate synthase (TPS) and phosphatase (TPP) and the expression of their mRNA (tps1, tps2, and tpp genes) in the muscle of adult female Ascaris suum was investigated. The presence of ivermectin in the medium caused a decrease in TPS and TPP activities during the experiment compared with the start and control groups. The exception was the group of worms grown for 8 hours in a IVM solution, in which there was a little higher TPS activity than in the control. Real-time qPCR analysis showed reduced expression of tps1 and tps2, and unchanged tpp expression after 20 hours of incubation relative to the expression at time zero. Relative to the appropriate control groups, the expression of tps2 gene was slight increased but the other two genes were reduced after 8-hours of IVM-treatment. Then the expression of all three genes was lower at the end of cultivation. The level of gene expression was positively correlated with the activity of specific enzymes. In the case of tpp gene there was only a weak correlation. Prolonged exposure to ivermectin was effective in lowering TPS and TPP activity and their mRNA expression. However, the drug did not block the pathway.