Vitamin C effects in mice experimentally infected with Trypanosoma cruzi QM2 strain

Revista da Sociedade Brasileira de Medicina Tropical

Alex Silva De Gusmão¹  Roberto Esteves Pires Castanho¹  Rodrigo Franzoso Almeida De Andrade¹  Clarisse Moreno Farsetti¹  Andressa Boim Mathias¹  Altino Luiz Silva Therezo¹  Luciamáre Perinetti Alves Martins¹ 

[1],Faculdade de Medicina de MaríliaMarília SP

关键词: Ascorbic acid;    T. cruzi;    Parasitemia;    Free radicals;    Acido ascórbico;    T. cruzi;    Parasitemia;    Radicais livres;   

DOI  :  10.1590/S0037-86822012000100010

来源: SciELO

【 摘 要 】

INTRODUCTION: To evaluate the efficacy of vitamin C in reducing the consequences generated by the production of free radicals in the acute and chronic phases of Chagas disease, two different doses of ascorbic acid were administered orally to 60 mice infected by Trypanosoma cruzi QM2 strain. METHODS: The animals were divided into six groups: G1, G2, and G3 for the acute phase study, and G'1, G'2, and G'3 for the chronic stage. The groups G1 and G'1 received 8.6x10-4mg/g of vitamin C daily, whereas G2 and G'2 received 7.14x10-3mg/g daily. The other groups, G3 and G'3, were considered placebos and received 10µL of mineral water. RESULTS: The study of the acute phase showed statistically significant differences between G1 and the other groups at various count days of the parasitemia evolution. The multiplying parasite was slower in G1 until the 11th day, but on the 22nd day it had greater parasitemia than in G2 and G3, and from the 36th day on, parasitemia stabilized at higher levels. However, when the histopathology of acute and chronic phases is considered, one does not note significant differences. CONCLUSIONS: The administration of two different doses of vitamin C was not able to protect mice and to contain the oxidative stress caused by free radicals formed by the metabolism of oxygen (reactive oxygen species) and nitrogen (reactive nitrogen species).

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