A short-range signal restricts cell movement between telencephalic proliferative zones

Christine Neyt, Melissa Welch, Alex Langston, Jhumku Kohtz, Gordon Fishell

    Research output: Contribution to journalArticle

    Abstract

    During telencephalic development, a boundary develops that restricts cell movement between the dorsal cortical and basal striatal proliferative zones. In this study, the appearance of this boundary and the mechanism by which cell movement is restricted were examined through a number of approaches. The general pattern of neuronal dispersion was examined both with an early neuronal marker and through the focal application of Dil to telencephalic explants. Both methods revealed that, although tangential neuronal dispersion is present throughout much of the telencephalon, it is restricted within the boundary region separating dorsal and ventral telencephalic proliferative zones. To examine the cellular mechanism underlying this boundary restriction, dissociated cells from the striatum were placed within both areas of the boundary, where dispersion is limited, and areas within the cortex, where significant cellular dispersion occurs. Cells placed within the boundary region remain round and extend only thin processes, whereas progenitors placed onto the cortical ventricular zone away from this boundary are able to migrate extensively. This suggests that the boundary inhibits directly the migration of cells. To examine whether the signal inhibiting dispersion within the boundary region acts as a long- or short-range cue, we apposed explants of boundary and nonboundary regions in vitro. Within these explants we found that migration was neither inhibited in nonboundary regions nor induced in boundary regions. This suggests that the boundary between dorsal and ventral telencephalon isolates these respective environments through either a contact-dependent or a short-range diffusible mechanism.

    Original languageEnglish (US)
    Pages (from-to)9194-9203
    Number of pages10
    JournalJournal of Neuroscience
    Volume17
    Issue number23
    StatePublished - Dec 2 1997

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    Telencephalon
    Cell Movement
    Corpus Striatum
    Cues

    Keywords

    • Boundary regions
    • Cell movement
    • Cellular processes
    • Dispersion
    • Proliferative zones
    • Telencephalon

    ASJC Scopus subject areas

    • Neuroscience(all)

    Cite this

    Neyt, C., Welch, M., Langston, A., Kohtz, J., & Fishell, G. (1997). A short-range signal restricts cell movement between telencephalic proliferative zones. Journal of Neuroscience, 17(23), 9194-9203.

    A short-range signal restricts cell movement between telencephalic proliferative zones. / Neyt, Christine; Welch, Melissa; Langston, Alex; Kohtz, Jhumku; Fishell, Gordon.

    In: Journal of Neuroscience, Vol. 17, No. 23, 02.12.1997, p. 9194-9203.

    Research output: Contribution to journalArticle

    Neyt, C, Welch, M, Langston, A, Kohtz, J & Fishell, G 1997, 'A short-range signal restricts cell movement between telencephalic proliferative zones', Journal of Neuroscience, vol. 17, no. 23, pp. 9194-9203.
    Neyt C, Welch M, Langston A, Kohtz J, Fishell G. A short-range signal restricts cell movement between telencephalic proliferative zones. Journal of Neuroscience. 1997 Dec 2;17(23):9194-9203.
    Neyt, Christine ; Welch, Melissa ; Langston, Alex ; Kohtz, Jhumku ; Fishell, Gordon. / A short-range signal restricts cell movement between telencephalic proliferative zones. In: Journal of Neuroscience. 1997 ; Vol. 17, No. 23. pp. 9194-9203.
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