Neurocisticercose experimental: efeito do tratamento anti-helmíntico no metabolismo energético e respiratório de cisticercos
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2013-02-28
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Universidade Federal de Goiás
Resumo
The analysis of the energetic and respiratory metabolism of Taenia crassiceps cysticerci innoculated into the encefalum of female BALB/c mice was performed. After 30 days of infection the mice were treated with low dosages (3.0 and 6.0 mg/kg) of albendazole and praziquantel aiming the observation of the alterations caused by a hostile environment on the parasite's metabolism. The aim of this study was to detect the influence of low dosages of anti-helminthic drugs on the production of organic acids related to the intermediary metabolism (oxaloacetate, malate, fumarate, succinate, citrate and α-ketoglutarate), carbohydrates metabolism (pyruvate, lactate, propionate, oxaloacetate and malate) and fatty acids and proteins catabolism (β-hydroxibutyrate, acetoacetate, acetate, α-ketoglutarate and oxalate) by T. crassiceps cysticerci innoculated into the CNS of BALB/c mice. Regarding the glycolisis, it was possible to detect lactate in all samples which shows that this parasite performs a lactic fermentation. As to the intermediary metabolism it was possible to detect oxaloacetate, citrate, malate, succinate, fumarate and α-ketoglutarate which indicates that the cysticerci may have used the tricarboxilic acid cycle (TCA) to produce energy. However facing the results found the evidences show that the cysticerci used a metabolic pathway denominated reversion of the TCA for energy production which presents as main end products propionate and acetate. There were no significant differences between the groups treated with the anti-helminthic and the control one except that the group treated with 6.0 mg/kg of albendazole presented acetate as main end product of the TCA reversion while the other groups presented propionate. In the groups treated with praziquantel, both concentrations, there was no production of acetate and in the 6.0 mg/kg of praziquntel there was no production of β-hydroxibutyrate wheter in the groups treated with both concentrations of albendazol there was an increase in the production of this organic acid which indicates the maximization of the energetic pathway of fatty acids oxidation and/or of the proteic catabolism. It was possible to conclude that T. crassiceps cysticerci when exposed to the conditions of this study preferred an anaerobic energy production pathway and probably performed the catabolism of carbohydrates, proteins and fatty acids.
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LEANDRO, Letícia de Almeida. Neurocisticercose experimental: efeito do tratamento anti-helmíntico no metabolismo energético e respiratório de cisticercos. 2013. 79 f. Dissertação (Mestrado Medicina Tropical e Saúde Publica) - Universidade Federal de Goiás, Goiânia, 2013.