Migration of newly generated neurons upon ependymally derived radial guide cells in explant cultures of the adult songbird forebrain
The adult songbird forebrain undergoes neuronal production throughout adulthood, with the production of new neurons in discrete regions of the neostriatal ventricular zone. Upon mitogenesis, these new neurons migrate into the subjacent brain parenchyma along radially directed guide fibers. In long-t...
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Published in | Glia Vol. 8; no. 3; p. 150 |
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Main Authors | , , |
Format | Journal Article |
Language | English |
Published |
United States
01.07.1993
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Abstract | The adult songbird forebrain undergoes neuronal production throughout adulthood, with the production of new neurons in discrete regions of the neostriatal ventricular zone. Upon mitogenesis, these new neurons migrate into the subjacent brain parenchyma along radially directed guide fibers. In long-term ventricular zone explant cultures, derived from the higher vocal center of the adult canary, newly migratory neurons were found to associate preferentially with a characteristic substrate cell type. These small, parvonuclear substrate cells formed tightly packed epithelioid sheets, in which ciliated ependymal cells were common, as recognized by both live observation and electron microscopy. A subpopulation of these cells was immunostained by monoclonal antibody 3A7, which preferentially stains the guide fiber network of the adult avian brain. These 3A7+ cells included ependymal cells and bipolar radial cells, as well as morphologically defined astrocytes. As they matured in vitro, the 3A7+ bipolar radial cells extended long, unbranching fibers, which ultimately traversed the culture substrate. Like ependymal cells, they supported neuronal migration. These cells were likely homologous to radial guide cells in vivo. Thus, neuronal migration in adult avian forebrain culture occurred upon guide cells of ependymal derivation. |
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AbstractList | The adult songbird forebrain undergoes neuronal production throughout adulthood, with the production of new neurons in discrete regions of the neostriatal ventricular zone. Upon mitogenesis, these new neurons migrate into the subjacent brain parenchyma along radially directed guide fibers. In long-term ventricular zone explant cultures, derived from the higher vocal center of the adult canary, newly migratory neurons were found to associate preferentially with a characteristic substrate cell type. These small, parvonuclear substrate cells formed tightly packed epithelioid sheets, in which ciliated ependymal cells were common, as recognized by both live observation and electron microscopy. A subpopulation of these cells was immunostained by monoclonal antibody 3A7, which preferentially stains the guide fiber network of the adult avian brain. These 3A7+ cells included ependymal cells and bipolar radial cells, as well as morphologically defined astrocytes. As they matured in vitro, the 3A7+ bipolar radial cells extended long, unbranching fibers, which ultimately traversed the culture substrate. Like ependymal cells, they supported neuronal migration. These cells were likely homologous to radial guide cells in vivo. Thus, neuronal migration in adult avian forebrain culture occurred upon guide cells of ependymal derivation. |
Author | Goldman, S A Chin, S S Lemmon, V |
Author_xml | – sequence: 1 givenname: S A surname: Goldman fullname: Goldman, S A organization: Department of Neurology and Neuroscience, Cornell University Medical College, New York, New York 10021 – sequence: 2 givenname: V surname: Lemmon fullname: Lemmon, V – sequence: 3 givenname: S S surname: Chin fullname: Chin, S S |
BackLink | https://www.ncbi.nlm.nih.gov/pubmed/8225557$$D View this record in MEDLINE/PubMed |
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Snippet | The adult songbird forebrain undergoes neuronal production throughout adulthood, with the production of new neurons in discrete regions of the neostriatal... |
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SubjectTerms | Animals Birds - anatomy & histology Canaries - anatomy & histology Cell Adhesion Cell Communication Cell Movement Cells, Cultured Ependyma - cytology Immunoenzyme Techniques Microscopy, Electron Neostriatum - cytology Neurons - cytology Organ Culture Techniques |
Title | Migration of newly generated neurons upon ependymally derived radial guide cells in explant cultures of the adult songbird forebrain |
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