Avaliação da memória espacial e expressão das proteínas TAU e GSK-3 em tecido encefálico de animais adultos após ativação imune neonatal

• Autor(a) principal: Dias, Paula
• Data de Publicação: 2018
• Tipo de documento: Dissertação
• Idioma: por
• Título da fonte: Repositório Universitário da Ânima (RUNA)
• Texto Completo: https://repositorio.animaeducacao.com.br/handle/ANIMA/3027
• topic: Ativação imune neonatal; Sistema nervoso central; Memória; GSK-3β; Tau

Introduction: The neonatal immune system is still immature, which makes them more susceptible to the infectious agents present in that period. Neonatal immune activation is associated with increased permeability of the blood-brain barrier (BBB), causing an inflammatory cascade in the Central Nervous System (CNS) and altering behavioral and neurochemical parameters. One of the hypotheses that has been studied is that neuroinflammation may be involved in neurodegenerative processes, such as in Alzheimer's disease (AD). Objective: To evaluate visuo-spatial memory and the expression of Tau and GSK-3β proteins in hippocampus and cortex of animals exposed to neonatal endotoxemia. Methods: C57BL/6 mice with two days old received a single injection of subcutaneous lipopolysaccharide (LPS). At 60,120 and 180 days old, visual-spatial memory was evaluated through the Morris walter maze and the hippocampus and córtex were dissected to evaluate the expression of Tau and GSK-3β proteins through the use of Western Blot. Results: In the animals exposed to LPS in the neonatal period there were ans visuo-spatial memory impairment at 120 and 180 days old. There was an increase in the expression of GSK-3β in hippocampus of the animals at 60, 120 and 180 days of life. In the cortex, this increase occurred only in 120 and 180 days old. Tau protein expression was high in hippocampus and cortex of animals at 120 days old and only in cortex at 180 days old. Conclusion: The data observed in this study show that neonatal immune activation may be associated with visuo-spatial memory impairment and increased expression of GSK-3β and Tau proteins in long-term. These evidences may base future studies on the relationship between neonatal neuroinflammation and long-term neurodegenerative processes.