Avaliação bioquímica in vitro do metabolismo energético de cisticercos de Taenia crassiceps expostos a um derivado benzimidazólico, RCB20

• Autor(a) principal: Fraga, Carolina Miguel
• Data de Publicação: 2015
• Tipo de documento: Tese
• Idioma: por
• Título da fonte: Repositório Institucional da UFG
• Texto Completo: http://repositorio.bc.ufg.br/tede/handle/tede/10477
• topic: Taenia crassiceps; Metabolismo energético; RCB20; Sulfóxido de albendazol; Energetic metaolibsm; Albendazole sulfoxide; CIENCIAS BIOLOGICAS::PARASITOLOGIA

Human infections caused by Taenia spp may be more frequent than they are reported especially if occurred in immunodepressed patients and if the location of the parasites does not involve vital organs. Albendazole is one of the drugs used in the treatment of such infections and its use in mass treatment campaigns may accelerate the resistance development from the parasites both in humans and animal hosts. The aim of this study was to in vitro evaluate the biochemical alterations in T. crassiceps cysticerci after the treatment with a benzimidazolic derivatice (RCB20). The cysticerci were removed from the peritoneal cavity of BALB/c mice with 30 days of infection, macroscopically classified and harvested into 6 well culture plates. 30 cysticerci from each development stage in each well received 5mL of supplemented RPMI culture medium which contained sulfoxide albendazole (ABZSO) (6,5 μM or 13 μM), or RCB20 (6,5 μM or 13 μM). After 24h of culture the cysticerci were removed from the culture medium and both were frozen in liquid nitrogen. Liquid chromatography of high performance and spectrophotometric analysis were performed. It was possible to observe a difficulty in the secretion of substances by the treated cysticerci due to differences in the concentrations of the products dosed from the vesicular fluid and from the culture medium. This was an effect from the mode of action of the drugs which affects the tubulin formation. Regarding the glycolysis it was possible to observe a gradation increase in the secretion/excretion (S/E) of lactate in the treated groups while there was a decrease of this organic acid in the vesicular fluid. As to the energetic metabolism and the citric acid cycle it was possible to observe its traditional sense functioning due to the detection of alf- ketoglutarate. It was possible an increase in the concentrations of citrate, malate, fumarate and succinate in the treated groups. The alternative pathway of energy production such as beta-oxidation of fatty acids and protein catabolism were detected with an increase in the metabolites from those pathways in the treated groups. Therefore we conclude that in spite of not blocking the glucose uptake the drugs influenced its uptake which lead to the use of alternative pathways of energy production. In spite of more soluble and stable the RCB20 formulation did not present a different biochemical effect than ABZSO.