Abstract
Neural stem cell (NSC) culture is a remarkable tool to investigate the potential therapeutic benefits of drugs in neurological diseases. The purpose of this study was to determine the effect of melatonin on proliferation and differentiation of NSCs in vitro. NSCs were isolated and expanded from mouse embryonic E14 cortex, and the effect of various concentrations of melatonin (0.05, 0.1, 0.5, 1, 5 and 10 μM) on NSC proliferation was assessed by MTT and neurosphere assay. Results showed that melatonin significantly increased NSC viability and NSC proliferation in a dose-dependent manner, in comparison to controls. Similarly, neurosphere formation frequency and cell counts increased significantly with increasing melatonin concentrations and reached its peak at 0.5 μM, in comparison to controls. Moreover, NSCs treated with either low (0.05 µM) or high concentrations (5 µM) of melatonin showed that the mean percentage of glial fibrillary acidic protein (GFAP) positive cells were not significantly different in PDGF or melatonin at 5 μM, in comparison to controls. However, low melatonin concentrations (0.05 µM) showed a slight significant increase in comparison to controls and PDGF. On the other hand, both concentrations of melatonin treatment significantly increased the percentage of myelin basic protein (MBP) positive cells (oligodendrocytes), in comparison to controls and to PDGF. Our results demonstrated, for the first time, that melatonin increased oligodendrocyte differentiation from NSCs. These results suggest that melatonin might have a potential therapeutic effect for some neurological diseases that involve oligodendrocyte and myelin pathologies.
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This work was supported by a Cell and Molecular research center of Yasuj University of medical science, Yasuj, Iran.
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Ghareghani, M., Sadeghi, H., Zibara, K. et al. Melatonin Increases Oligodendrocyte Differentiation in Cultured Neural Stem Cells. Cell Mol Neurobiol 37, 1319–1324 (2017). https://doi.org/10.1007/s10571-016-0450-4
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DOI: https://doi.org/10.1007/s10571-016-0450-4