Ovicidal activity of diaryl dichalcogenides and ivermectin on Fasciola hepatica: A novel candidate for a blending-based therapeutic strategy.

Autor: Romero-Neto I; Laboratory of Veterinary Clinical Parasitology, Department of Veterinary Medicine, Federal University of Paraná, Curitiba, Paraná 80035-050, Brazil., de Almeida TM; Laboratory of Veterinary Clinical Parasitology, Department of Veterinary Medicine, Federal University of Paraná, Curitiba, Paraná 80035-050, Brazil., Zugman T; Laboratory of Chemical and Enzymatic Synthesis, Department of Chemistry, Federal University of Paraná, Curitiba, Paraná 81531-980, Brazil., Piovan L; Laboratory of Chemical and Enzymatic Synthesis, Department of Chemistry, Federal University of Paraná, Curitiba, Paraná 81531-980, Brazil., Molento MB; Laboratory of Veterinary Clinical Parasitology, Department of Veterinary Medicine, Federal University of Paraná, Curitiba, Paraná 80035-050, Brazil. Electronic address: molento@ufpr.br.
Jazyk: angličtina
Zdroj: Acta tropica [Acta Trop] 2024 Oct; Vol. 258, pp. 107363. Date of Electronic Publication: 2024 Aug 15.
DOI: 10.1016/j.actatropica.2024.107363
Abstrakt: Fasciolosis is a food and waterborne disease caused by Fasciola spp., representing a global health burden to various hosts, including humans and other animals. This study investigates the in vitro activity of tellurium- and selenium-containing diaryl dichalcogenides: diacetal ditelluride (LQ07), diacetal diselenide (LQ62), and diacetyl diselenide (LQ68) alone and in combination with ivermectin (IVM) against eggs of Fasciola hepatica. The eggs were exposed for 12 h with each organochalcogen (OC) (0.1 - 2 mmol l -1 ) and IVM (0.01 - 2 mmol l -1 ) following an incubation of 15 days, allowing embryonation. The inhibitory concentration of 50 % (IC 50 ) of each OC or IVM was tested with the IC 10 , IC 30 , and IC 50 of IVM or each OC, respectively. LQ07, LQ62, and LQ68, as well as IVM, demonstrated a concentration-dependent ovicidal activity. The peak ovicidal activity of 99.74 % was achieved when IVM was tested at 2.0 mmol l -1 . LQ62 and LQ68 demonstrated greater ovicidal activity, having an IC 50 < 0.32 mmol l -1 being 6.25-fold more toxic than IVM alone. The percentage of dead eggs was significantly higher in the IVM group (early mortality), as Se-containing OCs led to the (miracidia) embryonation of the eggs with no hatching (late mortality). Blending Se-containing OCs and IVM showed an additive effect of up to 27 % against F. hepatica eggs. The present data contribute to the potential use of blending-based therapeutic strategies to combat F. hepatica infections in eradication programs worldwide. The combinations may also act against multidrug-resistant strains, reinstating drug-based parasite control.
Competing Interests: Declaration of competing interest The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper.
(Copyright © 2024 Elsevier B.V. All rights reserved.)
Databáze: MEDLINE
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