Induction of rat neural stem cells into oligodendrocyte precursor cells.
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We have previously established a culture method to isolate and cultivate neural stem cells (NSCs) derived from the rat embryonic brain and spinal cord. In the present study, we demonstrate that the spinal cord-derived NSCs can be induced to differentiate into oligodendrocyte precursor cells (OPCs) with a combined treatment composed of (1) conditioned medium collected from B104 neuroblastoma cells (B104CM) and (2) basic fibroblast growth factor (bFGF, 10 ng/ml). After induction, over 95% of the cells displayed bipolar or tri-polar morphology and expressed A2B5 and platelet derived growth factor receptor-alpha (PDGFR-alpha), markers that are specific for OPCs. Among PDGFR-alpha positive OPCs, only a few cells expressed glia fibrillary acidic protein (GFAP) and none expressed beta-tubulin III. In the presence of B104CM and bFGF, OPCs proliferated rapidly, formed spheres, expanded for multiple passages, and maintained their phenotypic properties. Upon withdrawal of B104CM and bFGF, these cells differentiated into either O4/GlaC-positive oligodendrocytes (OLs) or GFAP- and A2B5-positive type-2 astrocytes. Our results indicate that NSCs can be induced to differentiate into OPCs that possess properties of self-renewal and differentiation into oligodendrocytes and type-2 astrocytes, a property similar to that of O-2A progenitor cells. The OPCs can be maintained in an undifferentiated state over multiple divisions as long as both B104CM and bFGF are present in the medium. Thus, large quantity of OPCs can be obtained through this method for potential therapeutical interventions for various neurological degenerative diseases. (+info)
Development of cloned embryos from porcine neural stem cells and amniotic fluid-derived stem cells transfected with enhanced green fluorescence protein gene.
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Analysis of neuronal proliferation, migration and differentiation in the postnatal brain using equine infectious anemia virus-based lentiviral vectors.
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Molecular genetic analysis of FGFR1 signalling reveals distinct roles of MAPK and PLCgamma1 activation for self-renewal of adult neural stem cells.
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Clinical study of transplantation of neural stem cells in therapy of inherited cerebellar atrophy.
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OBJECTIVE: To study the clinical effect of neural stem cell transplantation in the treatment of inherited cerebellar atrophy (CA). METHODS: The cells from human fetal cerebellum (8-10 weeks of gestation) were grown and expanded in vitro. The cultured neurospheres were then planted into the dentate nuclei of patients by stereo tactic operation. Totally, 12 patients (7 males and 5 females with age ranging 22-62 years, mean 43 years) were treated by this operation from August 2006 to August 2008. RESULTS: The cells of fetal cerebellum were expanded by 10(7) folds in undifferentiated state in the culture. After the operation, no rejection was detected. Follow up, the effective rates were 58.3% after 3 months, 75.0% after 6 months, and 66.7% for 12-24 months (mean 18 months). CONCLUSION: The transplantation of in vitro cultured neural stem cell is a feasible and effective treatment for inherited CA, but the long term effectiveness need to be taken in consideration. (+info)