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Master's Dissertation
DOI
https://doi.org/10.11606/D.87.2010.tde-29092010-154904
Document
Author
Full name
Luis Bruno da Cruz e Alves de Moraes
Institute/School/College
Knowledge Area
Date of Defense
Published
São Paulo, 2010
Supervisor
Committee
Paes, João Tadeu Ribeiro (President)
Andrade, Telma Gonçalves Carneiro Spera de
Mello, Luiz Eugênio Araujo de Moraes
Title in Portuguese
Análise dos efeitos do transplante de células mononucleares da medula óssea em camundongos submetidos à lesão eletrolítica do hipocampo dorsal.
Keywords in Portuguese
Ansiedade
Células-tronco
Córtex cerebral
Hipocampo
Labirinto em cruz elevado
Lesão eletrolítica
Medula óssea
Abstract in Portuguese
Diversos estudos sugerem que as células-tronco da medula óssea podem ser úteis no tratamento de lesões do tecido nervoso. O presente estudo investigou se a terapia com células medulares seria capaz de modificar os efeitos comportamentais de lesões no hipocampo. Células mononucleares da medula óssea marcadas com a proteína fluorescente verde (EGFP) foram transplantadas em camundongos C57BL/6 que tiveram o hipocampo dorsal danificado por lesão eletrolítica bilateral. Os resultados da avaliação comportamental no labirinto em cruz elevado mostraram que a lesão hipocampal produziu ansiólise, quadro que foi atenuado nos animais transplantados. Na análise imuno-histoquímica do tecido cerebral, foi observada presença limitada de células EGFP+ no cérebro dos animais lesionados. Dada a não recuperação da citoarquitetura tissular, acredita-se que os benefícios observados sobre o comportamento tenham resultado de um efeito parácrino das células mononucleares, que auxiliaram na ação de mecanismos endógenos para restituição parcial das funções do hipocampo.
Title in English
Analysis of the effects of bone marrow mononuclear cells transplantation in mice submitted to electrolytic lesion of the dorsal hippocampus.
Keywords in English
Anxiety
Bone marrow
Cerebral Cortex
Electrolytic lesion
Elevated plus-maze
Hippocampus
Stem cells
Abstract in English
Several studies suggest that stem cells from bone marrow may be useful in treating lesions of the nervous tissue. This study investigated if bone marrow cell therapy would be able to modify the behavioral effects of lesions in the hippocampus. Bone marrow mononuclear cells labeled with the enhanced green fluorescent protein (EGFP) were transplanted into C57BL/6 mice which had the dorsal hippocampus damaged by bilateral electrolytic lesion. The results of the behavioral assessment in the elevated plus-maze showed that the hippocampal lesion produced anxiolysis, an effect that was attenuated in transplanted animals. Immunohistochemical analysis of brain tissue revealed, however, a limited presence of EGFP+ cells into the brains of injured animals. Given the non-recovery of the tissue cytoarchitecture, it is believed that the observed benefits on the behavior resulted from a paracrine effect of the mononuclear cells, which possibly helped in the action of endogenous mechanisms for partial reimbursement of the hippocampal functions.
 
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Publishing Date
2010-10-21
 
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