Made available in DSpace on 2014-12-17T15:36:44Z (GMT). No. of bitstreams: 1 EudesESL_TESE.pdf: 7375820 bytes, checksum: c195e08c1d621b363793dbcfb6727636 (MD5) Previous issue date: 2014-06-06 / Coordena??o de Aperfei?oamento de Pessoal de N?vel Superior / A number of evidences show the influence of the growth of injured nerve fibers in Peripheral Nervous System (PNS) as well as potential implant stem cells (SCs) to make it more suitable for nerve regeneration medium. In this perspective, this study aimed to evaluate the plasticity of mesenchymal stem cells from bone marrow of mice in the presence of culture medium conditioned with facial nerve explants (D-10) and fibroblast growth factor-2 (FGF-2). In this perspective, the cells were cultivated only with DMEM (group 1), only with D-10(group 2), only with FGF-2(group 3) or with D-10 and FGF-2(group 4). The growth and morphology were assessed over 72 hours. Quantitative phenotypic analysis was taken from the immunocytochemistry for GFAP, OX-42, MAP-2, β-tubulin III, NeuN and NF-200 on the fourth day of cultivation. Cells cultured with conditioned medium alone or combined with FGF-2 showed distinct morphological features similar apparent at certain times with neurons and glial cells and a significant proliferative activity in groups 2 and 4 throughout the days. Cells cultived only with conditioned medium acquired a glial phenotype. Cells cultured with FGF-2 and conditioned medium expressed GFAP, OX-42, MAP-2, β-tubulin III, NeuN and NF-200. On average, area and perimeter fo the group of cells positive for GFAP and the ?rea of the cells immunostained for OX-42 were higher than those of the group 4. This study enabled the plasticity of mesenchymal cells (MCs) in neuronal and glial nineage and opened prospects for the search with cell therapy and transdifferentiation / Uma s?rie de evid?ncias mostra a influ?ncia do meio no crescimento de fibras nervosas lesadas no Sistema Nervoso Perif?rico (SNP), assim como o potencial do implante de C?lulas Tronco (CTs) em tornar esse meio mais prop?cio ? regenera??o nervosa. Nessa perspectiva, esse estudo teve como objetivo avaliar a plasticidade de c?lulas tronco mesenquimais (CTMs) da medula ?ssea de ratos diante da presen?a de meio de cultura condicionado com explantes de nervo facial (D-10) e fator de crescimento fibrobl?stico-2 (FGF-2). Dessa maneira as c?lulas mesenquimais foram cultivadadas com meio DMEM (grupo 1), s? com meio D-10(grupo 2), s? com FGF-2(grupo 3) ou com meio D-10 e FGF-2(grupo 4). O crescimento e a morfologia celular foram avaliados ao longo de 72 horas. Al?m disso, a avalia??o fenot?pica foi feita a partir da imunocitoqu?mica para GFAP, OX-42, MAP-2, β-tubulina III, NeuN e NF-200 no quarto dia de cultivo. As c?lulas cultivadas com meio condicionado sozinho ou combinado com FGF-2 demonstraram caracter?sticas morfol?gicas semelhantes a neur?nios e c?lulas gliais e uma significativa atividade proliferativa nos grupos 2 e 4 ao longo dos dias. As c?lulas cultivadas com meio condicionado desprovido de tratamento com FGF-2 adquiriram fen?tipo glial demostrando imunorreatividade para GFAP e OX-42. As c?lulas cultivadas com meio condicionado com adi??o de FGF-2 expressaram GFAP, OX-42, MAP-2, β-tubulina III, NeuN e NF-200. Em m?dia, a ?rea e per?metro das c?lulas do grupo 2 positivas para GFAP e a ?rea das c?lulas imunomarcadas para OX-42 foram maiores do que as do grupo 4. O estudo possibilitou a plasticidade de c?lulas mesenquimais (CMs) numa linhagem neuronal e glial e abriu perspectivas para busca de novas t?cnicas com terapia e transdiferencia??o celular