Caracterização da resposta inflamatória local e sistêmica em camundongos infectados com cisticercos de Taenia crassiceps no subcutâneo

• Autor(a) principal: Freitas, Aline de Araújo
• Data de Publicação: 2010
• Tipo de documento: Dissertação
• Idioma: por
• Título da fonte: Repositório Institucional da UFG
• dARK ID: ark:/38995/0013000008bj7
• Texto Completo: http://repositorio.bc.ufg.br/tede/handle/tede/3566
• topic: Cisticercose subcutânea; Inflamação granulomatosa; Cisticercose experimental; Resposta imune; Subcutaneous cysticercosis; Granulomatous inflammation; Experimental cysticercosis; Immune response; CIENCIAS BIOLOGICAS::IMUNOLOGIA

The larval form of Taenia crassiceps has been used as an experimental model to human cysticercosis, because it has antigenic similarities with the T. solium cysticercus. The human cysticercosis by T. crassiceps has been reported in immunodepressed and immunocompetent patients. Due to the fact that the immune response to T. crassiceps is still unclear, the present study aimed to characterize the local and systemic inflammatory response of C57BL/6 wild-type and C57BL/6 IFN -Knockout (IFN-KO) mice strains after subcutaneous infection by T. crassiceps cysticercus. For this were evaluated the hemogram, the anatomopathological changes in the subcutaneous tissues , the presence of alternatively activated macrophages (CD301+ cells) and the serum cytokines concentration (IFN, IL-12p40 and IL-4). Neither of strains presented alterations on the hemogram after infection In both infected strains, it was observed granulomes formation on the inflammatory site with neutrophils and macrophages. However, the granulomatous reaction was more early, intense and with greater amount of collagen in infected IFN-KO. The serum concentrations of IFN, IL-12p40 and IL-4 in the infected C57BL/6 wild-type increased compared to the wild-type uninfected mice. In the infected IFN-KO, the increase of IL-4 serum concentration was observed due to the infection, however this cytokine concentration was lower compared with other infected strain. It was also observed in the C57BL/6 wild-type the presence of CD301+ cells at the beginning of the infection and, in the IFN-KO, these cells were present at the end of the infection. In conclusion, the immune response of C57BL/6 mice induced by T. crassiceps cysticercus can be characterized by mixed Th1/Th2 profile. The mixed response is able to promote the destruction of the parasites IFN-dependent, which results in a minor injury and lower collagen production. In IFN- deficient, there is a profile that tends towards the Th2 immune response, with the presence of CD301+ cells and increased collagen production.