| Neuropilin-mediated neural crest cell guidance is essential to organise sensory neurons into segmented dorsal root ganglia. | |
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MedLine Citation:
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PMID: 19386662 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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The peripheral nervous system (PNS) of higher vertebrates is segmented to align the spinal nerve roots with the vertebrae. This co-patterning is set up during embryogenesis, when vertebrae develop from the sclerotome layer of the metameric somites, and PNS neurons and glia differentiate from neural crest cells (NCCs) that preferentially migrate into the anterior sclerotome halves. Previous analyses of mice deficient in the class 3 semaphorin (SEMA3) receptors neuropilin (NRP) 1 or 2 raised the possibility that each controlled a distinct aspect of trunk NCC migration. We now demonstrate that both pathways act sequentially in distinct NCC subpopulations and thereby cooperate to enforce segmental NCC migration. Specifically, SEMA3A/NRP1 signalling first directs one population of NCCs from the intersomitic path into the sclerotome, and SEMA3F/NRP2 signalling acts subsequently to restrict a second population to the anterior half of the sclerotome. NCC exclusion from either the posterior sclerotome or the intersomitic boundary is sufficient to enforce the separation of neighbouring NCC streams and the segregation of sensory NCC progeny into metameric dorsal root ganglia (DRG). By contrast, the combined loss of both guidance pathways leads to ectopic invasion of the intersomitic furrows and posterior sclerotome halves, disrupting metameric NCC streaming and DRG segmentation. |
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Authors:
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Quenten Schwarz; Charlotte H Maden; Kathryn Davidson; Christiana Ruhrberg |
Publication Detail:
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Type: Journal Article; Research Support, Non-U.S. Gov't Date: 2009-04-22 |
Journal Detail:
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Title: Development (Cambridge, England) Volume: 136 ISSN: 0950-1991 ISO Abbreviation: Development Publication Date: 2009 Jun |
Date Detail:
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Created Date: 2009-05-11 Completed Date: 2009-11-13 Revised Date: 2010-09-27 |
Medline Journal Info:
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Nlm Unique ID: 8701744 Medline TA: Development Country: England |
Other Details:
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Languages: eng Pagination: 1785-9 Citation Subset: IM |
Affiliation:
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Institute of Ophthalmology, University College London, London EC1V 9EL, UK. |
Export Citation:
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APA/MLA Format Download EndNote Download BibTex |
| MeSH Terms | |
Descriptor/Qualifier:
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Animals Body Patterning / physiology Ganglia, Spinal / cytology*, embryology, metabolism Membrane Proteins / genetics, metabolism Mice Mice, Mutant Strains Mutation Nerve Tissue Proteins / genetics, metabolism Neural Crest / cytology*, embryology, metabolism Neuropilin-1 / genetics, metabolism* Neuropilin-2 / genetics, metabolism* Semaphorin-3A / genetics, metabolism Sensory Receptor Cells / cytology*, metabolism Signal Transduction |
| Grant Support | |
ID/Acronym/Agency:
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G0600993(79144)//Medical Research Council; g0600993//Medical Research Council |
| Chemical | |
Reg. No./Substance:
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0/Membrane Proteins; 0/Nerve Tissue Proteins; 0/Neuropilin-2; 0/Sema3a protein, mouse; 0/Sema3f protein, mouse; 0/Semaphorin-3A; 144713-63-3/Neuropilin-1 |
| Comments/Corrections | |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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