Transplante de células mononucleares de medula óssea em modelo lesional da doença de Parkinson

• Ano de defesa: 2011
• Autor(a) principal: Silva, Caroline Calice da
• Orientador(a): Costa, Jaderson Costa da
• Tipo de documento: Dissertação
• Tipo de acesso: Acesso aberto
• Idioma: por
• Instituição de defesa: Pontifícia Universidade Católica do Rio Grande do Sul; Porto Alegre
• Palavras-chave em Português: MEDICINA; DOENÇA DE PARKINSON; CÉLULAS-TRONCO; TRANSPLANTES; MEDULA ÓSSEA; EPIDEMIOLOGIA EXPERIMENTAL
• Link de acesso: http://hdl.handle.net/10923/4367

Parkinson´s disease (PD) is characterized by a progressive loss of dopaminergic neurons from substantia nigra (SN), which leads to a deficiency of dopamine levels in the striatum. This deficiency is responsible by the development of motor symptoms like rest tremor, bradykinesia, rigidity and postural instability. Other alternatives to PD treatment have been studied and a promising possibility is the stem cell transplantation. The present study aims to assess the therapeutic potential of bone marrow-derived mononuclear cells (BMMC) transplantation in a mouse model of Parkinson´s disease. Animals underwent stereotaxic surgery and 6- hydroxydopamine (6-OHDA) was injected into their medial forebrain bundle (MFB). Three weeks later, they were transplanted with BMMCs, fibroblast or saline, through the caudal vein. Motor function was assessed using the Rotarod test and the apomorphine-induced rotation test. We had showed that BMMC, transplanted through caudal vein in parkinsonian mouse, are able to cross the BBB and migrate forward the encephalic tissue, besides survive until 1 week after transplantation. These cells, however, were not capable to restore the normal motor function of those animals, within 30 days post-transplantation. Whether BMMC could restore nigroestriatal dopaminergic neurons only to the histological level, and that restoration cannot be detected by motor test carried out, remains unclear.