PUBLICATION
Non-thalamic origin of zebrafish sensory nuclei implies convergent evolution of visual pathways in amniotes and teleosts
- Authors
- Bloch, S., Hagio, H., Thomas, M., Heuzé, A., Hermel, J.M., Lasserre, E., Colin, I., Saka, K., Affaticati, P., Jenett, A., Kawakami, K., Yamamoto, N., Yamamoto, K.
- ID
- ZDB-PUB-200909-5
- Date
- 2020
- Source
- eLIFE 9: (Journal)
- Registered Authors
- Affaticati, Pierre, Colin, Ingrid, Hermel, Jean-Michel, Jenett, Arnim, Kawakami, Koichi, Yamamoto, Kei
- Keywords
- forebrain, homology, midbrain, neuroscience, thalamus, vertebrates, visual pathway, zebrafish
- MeSH Terms
-
- Animals
- Thalamic Nuclei/embryology*
- Cell Lineage*
- Embryo, Nonmammalian/embryology
- Biological Evolution*
- Zebrafish/embryology*
- Visual Pathways/embryology*
- PubMed
- 32896272 Full text @ Elife
Citation
Bloch, S., Hagio, H., Thomas, M., Heuzé, A., Hermel, J.M., Lasserre, E., Colin, I., Saka, K., Affaticati, P., Jenett, A., Kawakami, K., Yamamoto, N., Yamamoto, K. (2020) Non-thalamic origin of zebrafish sensory nuclei implies convergent evolution of visual pathways in amniotes and teleosts. eLIFE. 9:.
Abstract
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.
Genes / Markers
Expression
Phenotype
Mutations / Transgenics
Human Disease / Model
Sequence Targeting Reagents
Fish
Orthology
Engineered Foreign Genes
Mapping