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A study of the lateral pallium in zebrafish and the visual tectum of the medaka revealed a population of adult neuroepithelial NE cells supported from the early stage of development to various postembryonic stages of ontogenesis These data emphasize the importance of non-radial glial stem cells in the neurogenesis of adult animals in particular fish However the distribution cell cycle features and molecular markers of NE cells and glial progenitors in fish are still poorly understood at the postembryonic stages of ontogenesis Fetalization predominates in the ontogenetic development of salmon fish which is associated with a delay in development and preservation of the features of the embryonic structure of the brain during the first year of life In the present work we studied the features of proliferation and the migration of neuronal precursors in the pallial proliferative zone of juvenile Oncorhynchus masou The aim of the study is a comparative analysis of the distribution of glial-type aNSCs markers such as vimentin and glial fibrillar acid protein GFAP as well as the proliferation marker BrdU and migratory neuronal precursor doublecortin in the pallial zone of the intact telencephalon in juvenile O masou normal and after mechanical injury The immunohistochemical IHC labeling with antibodies to vimentin GFAP and doublecortin in the pallium of intact fish revealed single small round and oval immunopositive cells that correspond to a persistent pool of neuronal and or glial progenitors After the injury heterogeneous cell clusters radial glia processes single and small intensely labeled GFAP cells in the parenchyma of Dd and lateral part of pallium Dl appeared corresponding to reactive neurogenic niches containing glial aNSCs A multifold increase in the pool of Vim neuronal precursor cells NPCs resulting from the injury was observed Vim cells of the neuroepithelial type in Dd and Dm and cells of the glial type were identified in Dl after the injury Doublecortine Dc immunolabeling after the injury revealed the radial migration of neuroblasts into Dm from the neurogenic zone of the pallium The appearance of intensely labeled Dc cells in the brain parenchyma might indicate the activation of resident aNSCs as a consequence of the traumatic process

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Proliferation, Adult Neuronal Stem Cells and Cells Migration in Pallium during Constitutive Neurogenesis and after Traum...

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with pallial part of telencephalon as keyword