Non-thalamic origin of zebrafish sensory nuclei implies convergent evolution of visual pathways in amniotes and teleosts.

Autor:	Bloch S; Paris-Saclay Institute of Neuroscience (Neuro-PSI), Université Paris-Saclay, CNRS, Gif-sur-Yvette, France., Hagio H; Laboratory of Fish Biology, Graduate School of Bioagricultural Sciences, Nagoya University, Nagoya, Japan.; Institute for Advanced Research, Nagoya University, Nagoya, Japan., Thomas M; Paris-Saclay Institute of Neuroscience (Neuro-PSI), Université Paris-Saclay, CNRS, Gif-sur-Yvette, France., Heuzé A; Paris-Saclay Institute of Neuroscience (Neuro-PSI), Université Paris-Saclay, CNRS, Gif-sur-Yvette, France., Hermel JM; Paris-Saclay Institute of Neuroscience (Neuro-PSI), Université Paris-Saclay, CNRS, Gif-sur-Yvette, France., Lasserre E; Paris-Saclay Institute of Neuroscience (Neuro-PSI), Université Paris-Saclay, CNRS, Gif-sur-Yvette, France., Colin I; Paris-Saclay Institute of Neuroscience (Neuro-PSI), Université Paris-Saclay, CNRS, Gif-sur-Yvette, France., Saka K; Laboratory of Molecular and Developmental Biology, National Institute of Genetics, Mishima, Japan., Affaticati P; TEFOR Paris-Saclay, CNRS UMS2010, INRA UMS1451, Université Paris-Saclay, Gif-sur-Yvette, France., Jenett A; TEFOR Paris-Saclay, CNRS UMS2010, INRA UMS1451, Université Paris-Saclay, Gif-sur-Yvette, France., Kawakami K; Laboratory of Molecular and Developmental Biology, National Institute of Genetics, Mishima, Japan.; Department of Genetics, SOKENDAI (The Graduate University for Advanced Studies), Mishima, Japan., Yamamoto N; Laboratory of Fish Biology, Graduate School of Bioagricultural Sciences, Nagoya University, Nagoya, Japan., Yamamoto K; Paris-Saclay Institute of Neuroscience (Neuro-PSI), Université Paris-Saclay, CNRS, Gif-sur-Yvette, France.
Jazyk:	angličtina
Zdroj:	ELife [Elife] 2020 Sep 08; Vol. 9. Date of Electronic Publication: 2020 Sep 08.
DOI:	10.7554/eLife.54945
Abstrakt:	Ascending visual projections similar to the mammalian thalamocortical pathway are found in a wide range of vertebrate species, but their homology is debated. To get better insights into their evolutionary origin, we examined the developmental origin of a thalamic-like sensory structure of teleosts, the preglomerular complex (PG), focusing on the visual projection neurons. Similarly to the tectofugal thalamic nuclei in amniotes, the lateral nucleus of PG receives tectal information and projects to the pallium. However, our cell lineage study in zebrafish reveals that the majority of PG cells are derived from the midbrain, unlike the amniote thalamus. We also demonstrate that the PG projection neurons develop gradually until late juvenile stages. Our data suggest that teleost PG, as a whole, is not homologous to the amniote thalamus. Thus, the thalamocortical-like projections evolved from a non-forebrain cell population, which indicates a surprising degree of variation in the vertebrate sensory systems. Competing Interests: SB, HH, MT, AH, JH, EL, IC, KS, PA, AJ, KK, NY, KY No competing interests declared (© 2020, Bloch et al.)
Databáze:	MEDLINE
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