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Volkmann, K. ; Rieger, S. ; Babaryka, A.N. ; Köster, R.W.

The zebrafish cerebellar rhombic lip is spatially patterned in producing granule cell populations of different functional compartments.

Dev. Biol. 313, 167-180 (2008)

Open Access Green as soon as Postprint is submitted to ZB.

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The upper rhombic lip, a prominent germinal zone of the cerebellum, was recently demonstrated to generate different neuronal cell types over time from spatial subdomains. We have characterized the differentiation of the upper rhombic lip derived granule cell population in stable GFP-transgenic zebrafish in the context of zebrafish cerebellar morphogenesis. Time-lapse analysis followed by individual granule cell tracing demonstrates that the zebrafish upper rhombic lip is spatially patterned along its mediolateral axis producing different granule cell populations simultaneously. Time-lapse recordings of parallel fiber projections and retrograde labeling reveal that spatial patterning within the rhombic lip corresponds to granule cells of two different functional compartments of the mature cerebellum: the eminentia granularis and the corpus cerebelli. These cerebellar compartments in teleosts correspond to the mammalian vestibulocerebellar and non-vestibulocerebellar system serving balance and locomotion control, respectively. Given the high conservation of cerebellar development in vertebrates, spatial partitioning of the mammalian granule cell population and their corresponding earlier-produced deep nuclei by patterning within the rhombic lip may also delineate distinct functional compartments of the cerebellum. Thus, our findings offer an explanation for how specific functional cerebellar circuitries are laid down by spatio-temporal patterning of cerebellar germinal zones during early brain development.

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Publication type Article: Journal article

Document type Scientific Article

Corresponding Author

Keywords Zebrafish; Cerebellum; Granule cell; Neuronal migration; Bioimaging; Cell tracing; Fate mapping

ISSN (print) / ISBN 0012-1606

e-ISSN 0012-1606

Journal Developmental Biology

Quellenangaben Volume: 313, Issue: 1, Pages: 167-180

Publisher Elsevier

Non-patent literature Publications

Reviewing status Peer reviewed

Institute(s) Institute of Developmental Genetics (IDG)