Abstract
AbstractIn Bilaterians, commissural neurons project their axons across the midline of the nervous system to target neurons on the opposite side. In mammals, midline crossing at the level of the hindbrain and spinal cord requires the Robo3 receptor which is transiently expressed by all commissural neurons. Unlike other Robo receptors, mammalian Robo3 receptors do not bind Slit ligands and promote midline crossing. Surprisingly, not much is known about Robo3 distribution and mechanism of action in other vertebrate species.Here, we have used whole‐mount immunostaining, tissue clearing and light‐sheet fluorescent microscopy to study Robo3 expression pattern in embryonic tissue from diverse representatives of amniotes at distinct stages, including squamate (African house snake), birds (chicken, duck, pigeon, ostrich, emu and zebra finch), early postnatal marsupial mammals (fat‐tailed dunnart), and eutherian mammals (mouse and human). The analysis of this rich and unique repertoire of amniote specimens reveals conserved features of Robo3 expression in midbrain, hindbrain and spinal cord commissural circuits, which together with subtle but meaningful modifications could account for species‐specific evolution of sensory‐motor and cognitive capacities. Our results also highlight important differences of precerebellar nuclei development across amniotes.
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References
90
[1]
One hundred million years of interhemispheric communication: the history of the corpus callosum

F. Aboitiz, J. Montiel

Brazilian Journal of Medical and Biological Resear... 10.1590/s0100-879x2003000400002
[2]
SnapShot: Spinal Cord Development

William A. Alaynick, Thomas M. Jessell, Samuel L. Pfaff

Cell 10.1016/j.cell.2011.06.038
[31]
Three-dimensional imaging of solvent-cleared organs using 3DISCO

Ali Ertürk, Klaus Becker, Nina Jährling et al.

Nature Protocols 10.1038/nprot.2012.119
[44]
His W. "Die Entwickelung des menschlichen Rautenhirns vom Ende des ersten bis zum Beginn des dritten Monats" Abhandlungen der königlich sächsischen Gesellschafi der Wissenschaften, Math Klasse (1891)

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Details
Published
Mar 04, 2019
Vol/Issue
527(12)
Pages
2009-2029
License
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Funding
Agence Nationale de la Recherche Award: ANR‐10‐LABX‐65
National Health and Medical Research Council Award: GNT1035093
Australian Research Council Award: DE160101394
Cite This Article
François Friocourt, Peter Kozulin, Morgane Belle, et al. (2019). Shared and differential features of Robo3 expression pattern in amniotes. Journal of Comparative Neurology, 527(12), 2009-2029. https://doi.org/10.1002/cne.24648
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