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The neuroepithelial basement membrane serves as a boundary and a substrate for neuron migration in the zebrafish hindbrain
BACKGROUND: The facial branchiomotor neurons of cranial nerve VII undergo a stereotyped tangential migration in the zebrafish hindbrain that provides an ideal system for examining the complex interactions between neurons and their environment that result in directed migration. Several studies have s...
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Formato: | Texto |
Lenguaje: | English |
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BioMed Central
2010
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Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2857861/ https://www.ncbi.nlm.nih.gov/pubmed/20350296 http://dx.doi.org/10.1186/1749-8104-5-9 |
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author | Grant, Paul K Moens, Cecilia B |
author_facet | Grant, Paul K Moens, Cecilia B |
author_sort | Grant, Paul K |
collection | PubMed |
description | BACKGROUND: The facial branchiomotor neurons of cranial nerve VII undergo a stereotyped tangential migration in the zebrafish hindbrain that provides an ideal system for examining the complex interactions between neurons and their environment that result in directed migration. Several studies have shown the importance of the planar cell polarity pathway in facial branchiomotor neuron migration but the role of apical-basal polarity has not been determined. Here we examine the role of the PAR-aPKC complex in forming the basal structures that guide facial branchiomotor neurons on an appropriate migratory path. RESULTS: High resolution timelapse imaging reveals that facial branchiomotor neurons begin their migration by moving slowly ventrally and posteriorly with their centrosomes oriented medially and then, upon contact with the Laminin-containing basement membrane at the rhombomere 4-rhombomere 5 boundary, speed up and reorient their centrosomes on the anterior-posterior axis. Disruption of the PAR-aPKC complex members aPKCλ, aPKCζ, and Pard6gb results in an ectopic ventral migration in which facial branchiomotor neurons escape from the hindbrain through holes in the Laminin-containing basement membrane. Mosaic analysis reveals that the requirement for aPKC is cell-nonautonomous, indicating that it is likely required in the surrounding polarized neuroepithelium rather than in facial motor neurons themselves. Ventral facial motor neuron ectopia can be phenocopied by mutation of lamininα1, suggesting that it is defects in maintenance of the laminin-containing basement membrane that are the likely cause of ventral mismigration in aPKCλ+ζ double morphants. CONCLUSIONS: Our results suggest that the laminin-containing ventral basement membrane, dependent on the activity of the PAR-aPKC complex in the hindbrain neuroepithelium, is both a substrate for migration and a boundary that constrains facial branchiomotor neurons to the appropriate migratory path. |
format | Text |
id | pubmed-2857861 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2010 |
publisher | BioMed Central |
record_format | MEDLINE/PubMed |
spelling | pubmed-28578612010-04-22 The neuroepithelial basement membrane serves as a boundary and a substrate for neuron migration in the zebrafish hindbrain Grant, Paul K Moens, Cecilia B Neural Dev Research article BACKGROUND: The facial branchiomotor neurons of cranial nerve VII undergo a stereotyped tangential migration in the zebrafish hindbrain that provides an ideal system for examining the complex interactions between neurons and their environment that result in directed migration. Several studies have shown the importance of the planar cell polarity pathway in facial branchiomotor neuron migration but the role of apical-basal polarity has not been determined. Here we examine the role of the PAR-aPKC complex in forming the basal structures that guide facial branchiomotor neurons on an appropriate migratory path. RESULTS: High resolution timelapse imaging reveals that facial branchiomotor neurons begin their migration by moving slowly ventrally and posteriorly with their centrosomes oriented medially and then, upon contact with the Laminin-containing basement membrane at the rhombomere 4-rhombomere 5 boundary, speed up and reorient their centrosomes on the anterior-posterior axis. Disruption of the PAR-aPKC complex members aPKCλ, aPKCζ, and Pard6gb results in an ectopic ventral migration in which facial branchiomotor neurons escape from the hindbrain through holes in the Laminin-containing basement membrane. Mosaic analysis reveals that the requirement for aPKC is cell-nonautonomous, indicating that it is likely required in the surrounding polarized neuroepithelium rather than in facial motor neurons themselves. Ventral facial motor neuron ectopia can be phenocopied by mutation of lamininα1, suggesting that it is defects in maintenance of the laminin-containing basement membrane that are the likely cause of ventral mismigration in aPKCλ+ζ double morphants. CONCLUSIONS: Our results suggest that the laminin-containing ventral basement membrane, dependent on the activity of the PAR-aPKC complex in the hindbrain neuroepithelium, is both a substrate for migration and a boundary that constrains facial branchiomotor neurons to the appropriate migratory path. BioMed Central 2010-03-29 /pmc/articles/PMC2857861/ /pubmed/20350296 http://dx.doi.org/10.1186/1749-8104-5-9 Text en Copyright ©2010 Grant and Moens; licensee BioMed Central Ltd. http://creativecommons.org/licenses/by/2.0 This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/2.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. |
spellingShingle | Research article Grant, Paul K Moens, Cecilia B The neuroepithelial basement membrane serves as a boundary and a substrate for neuron migration in the zebrafish hindbrain |
title | The neuroepithelial basement membrane serves as a boundary and a substrate for neuron migration in the zebrafish hindbrain |
title_full | The neuroepithelial basement membrane serves as a boundary and a substrate for neuron migration in the zebrafish hindbrain |
title_fullStr | The neuroepithelial basement membrane serves as a boundary and a substrate for neuron migration in the zebrafish hindbrain |
title_full_unstemmed | The neuroepithelial basement membrane serves as a boundary and a substrate for neuron migration in the zebrafish hindbrain |
title_short | The neuroepithelial basement membrane serves as a boundary and a substrate for neuron migration in the zebrafish hindbrain |
title_sort | neuroepithelial basement membrane serves as a boundary and a substrate for neuron migration in the zebrafish hindbrain |
topic | Research article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2857861/ https://www.ncbi.nlm.nih.gov/pubmed/20350296 http://dx.doi.org/10.1186/1749-8104-5-9 |
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