Change in the neurochemical signature and morphological development of the parvocellular isthmic projection to the avian tectum

Reyes‐Pinto R, Ferrán JL, Vega Zuniga TA, González‐Cabrera C, Luksch H, Mpodozis J, Puelles L, Marín GJ. 2021. Change in the neurochemical signature and morphological development of the parvocellular isthmic projection to the avian tectum. Journal of Comparative Neurology.

Download
No fulltext has been uploaded. References only!

Journal Article | Epub ahead of print | English

Scopus indexed
Author
Reyes‐Pinto, Rosana; Ferrán, José L.; Vega Zuniga, Tomas AIST Austria; González‐Cabrera, Cristian; Luksch, Harald; Mpodozis, Jorge; Puelles, Luis; Marín, Gonzalo J.
Department
Abstract
Neurons can change their classical neurotransmitters during ontogeny, sometimes going through stages of dual release. Here, we explored the development of the neurotransmitter identity of neurons of the avian nucleus isthmi parvocellularis (Ipc), whose axon terminals are retinotopically arranged in the optic tectum (TeO) and exert a focal gating effect upon the ascending transmission of retinal inputs. Although cholinergic and glutamatergic markers are both found in Ipc neurons and terminals of adult pigeons and chicks, the mRNA expression of the vesicular acetylcholine transporter, VAChT, is weak or absent. To explore how the Ipc neurotransmitter identity is established during ontogeny, we analyzed the expression of mRNAs coding for cholinergic (ChAT, VAChT, and CHT) and glutamatergic (VGluT2 and VGluT3) markers in chick embryos at different developmental stages. We found that between E12 and E18, Ipc neurons expressed all cholinergic mRNAs and also VGluT2 mRNA; however, from E16 through posthatch stages, VAChT mRNA expression was specifically diminished. Our ex vivo deposits of tracer crystals and intracellular filling experiments revealed that Ipc axons exhibit a mature paintbrush morphology late in development, experiencing marked morphological transformations during the period of presumptive dual vesicular transmitter release. Additionally, although ChAT protein immunoassays increasingly label the growing Ipc axon, this labeling was consistently restricted to sparse portions of the terminal branches. Combined, these results suggest that the synthesis of glutamate and acetylcholine, and their vesicular release, is complexly linked to the developmental processes of branching, growing and remodeling of these unique axons.
Publishing Year
Date Published
2021-08-17
Journal Title
Journal of Comparative Neurology
Acknowledgement
This work was supported by FONDECYT grants 1151432 and 1210169 to Gonzalo J. Marín. FONDECYT grant 1210069 to Jorge Mpodozis. Spanish Ministry of Science, Innovation and Universities (MCIU), State Research Agency (AEI) and European Regional Development Fund (FEDER), PGC2018-098229-B-100 to José L Ferrán. Spanish Ministry of Economy and Competitiveness Excellency Grant BFU2014-57516P (with European Community FEDER support), and a Seneca Foundation (Autonomous Community of Murcia) Excellency Research contract, ref: 19904/ GERM/15; project name: Genoarchitectonic Brain Development and Applications to Neurodegenerative Diseases and Cancer (5672 Fundación Séneca) to Luis Puelles. The authors gratefully acknowledge the valuable editorial help provided by Sara Fernández-Collemann. The authors also thank Elisa Sentis and Solano Henríquez for expert technical help.
ISSN
eISSN
IST-REx-ID

Cite this

Reyes‐Pinto R, Ferrán JL, Vega Zuniga TA, et al. Change in the neurochemical signature and morphological development of the parvocellular isthmic projection to the avian tectum. Journal of Comparative Neurology. 2021. doi:10.1002/cne.25229
Reyes‐Pinto, R., Ferrán, J. L., Vega Zuniga, T. A., González‐Cabrera, C., Luksch, H., Mpodozis, J., … Marín, G. J. (2021). Change in the neurochemical signature and morphological development of the parvocellular isthmic projection to the avian tectum. Journal of Comparative Neurology. Wiley. https://doi.org/10.1002/cne.25229
Reyes‐Pinto, Rosana, José L. Ferrán, Tomas A Vega Zuniga, Cristian González‐Cabrera, Harald Luksch, Jorge Mpodozis, Luis Puelles, and Gonzalo J. Marín. “Change in the Neurochemical Signature and Morphological Development of the Parvocellular Isthmic Projection to the Avian Tectum.” Journal of Comparative Neurology. Wiley, 2021. https://doi.org/10.1002/cne.25229.
R. Reyes‐Pinto et al., “Change in the neurochemical signature and morphological development of the parvocellular isthmic projection to the avian tectum,” Journal of Comparative Neurology. Wiley, 2021.
Reyes‐Pinto R, Ferrán JL, Vega Zuniga TA, González‐Cabrera C, Luksch H, Mpodozis J, Puelles L, Marín GJ. 2021. Change in the neurochemical signature and morphological development of the parvocellular isthmic projection to the avian tectum. Journal of Comparative Neurology.
Reyes‐Pinto, Rosana, et al. “Change in the Neurochemical Signature and Morphological Development of the Parvocellular Isthmic Projection to the Avian Tectum.” Journal of Comparative Neurology, Wiley, 2021, doi:10.1002/cne.25229.

Export

Marked Publications

Open Data IST Research Explorer

Sources

PMID: 34363623
PubMed | Europe PMC

Search this title in

Google Scholar