Aspectos histopatológicos da neurocisticercose experimental e perfil de citocinas em camundongos C57BL/6
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2017-03-15
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Universidade Federal de Goiás
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Neurocysticercosis (NCC) is one of the diseases neglected by the World Health Organization (WHO), and the parasitic infection that most affects the Central Nervous System (CNS) throughout the world. Thus, it is necessary to deepen the knowledge regarding its immunopathogenesis and physiopathology in order to elucidate mechanisms by which NCC causes tissue injury in infected patients. With the advent of this necessity the search for ways to facilitate the experimental study of this disease has arisen, and today, the use of the cysticercus species of Taenia crassiceps is well diffused in the scientific environment. The objective of this work was to describe the general pathological processes and the profile of systemic and in situ cytokines in C57BL / 6 mice after intracranial inoculation of viable cysticerci of T. crassiceps. Three experimental groups were used: healthy control, surgical control and infected group. After 90 days of infection, mice were euthanized and histopathological analysis of the brain, spleen cell culture, homogenate production and ELISA for IL-4, IL10 and IFN-γ were performed. The histopathological analysis of the encephalus allowed to verify the presence of cysticercus in the lateral ventricles or in the extraparenchymal region, presence of mononuclear inflammatory infiltrate (MN) around the parasite, microgliosis and meningitis. The analysis of the systemic and in situ immune profiles of the infected mice showed a predominance of Th2-type response, with high IL-4 concentration, low IFN-γ and IL-10 levels modulating the two responses, but mainly Th1. The in situ cytokine dosage was similar between the experimental groups, which leads us to conclude that the cysticercus exerts immunomodulation for its survival, in addition to which it also benefits from the cerebral immunoprivilege. In conclusion, correlating the immune and histological aspects described after the analysis, we can suggest that T. crassiceps cysticercosis infection in C57BL / 6 mice triggers an inflammatory response, a predominance of Th2 type profile with MN inflammatory infiltrate presence, Meningitis and microgliosis.
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MILHOMEM, A. C. Aspectos histopatológicos da neurocisticercose experimental e perfil de citocinas em camundongos C57BL/6. 2017. 67 f. Dissertação (Mestrado em Medicina Tropical e Saúde Publica) - Universidade Federal de Goiás, Goiânia, 2017.