Differential expression of CRMP1, CRMP2A, CRMP2B, and CRMP5 in axons or dendrites of distinct neurons in the mouse brain
CRMP1, CRMP2, and CRMP5 have been identified as cytosolic proteins relaying semaphorin 3A signalling, one of the molecular cues conducting axon and dendrite growth and guidance. They are highly expressed during brain ontogenesis, but, because of their lower levels in the adult, their distribution in...
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Published in | Journal of comparative neurology (1911) Vol. 486; no. 1; pp. 1 - 17 |
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Main Authors | , , , , , , , , , , |
Format | Journal Article |
Language | English |
Published |
Hoboken
Wiley Subscription Services, Inc., A Wiley Company
23.05.2005
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Subjects | |
Online Access | Get full text |
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Summary: | CRMP1, CRMP2, and CRMP5 have been identified as cytosolic proteins relaying semaphorin 3A signalling, one of the molecular cues conducting axon and dendrite growth and guidance. They are highly expressed during brain ontogenesis, but, because of their lower levels in the adult, their distribution in the mature brain is poorly documented. By using specific antibodies, we investigated the cellular distribution of these CRMPs in different adult brain structures and in neural cell cultures with a special focus on the splice variants CRMP2A and CRMP2B. In brain sections of adult mouse, CRMP1, CRMP2B, and CRMP5 were located predominantly in dendrites of specific neuronal populations, such as cortical pyramidal neurons, hippocampal CA1 pyramidal cells, or Purkinje cerebellar cells. On the contrary, CRMP2A was specifically associated with axons of the corpus callosum, bundles of the striatum, and mossy fibers of the hippocampus. In cultures of cortical neurons, CRMP1, CRMP2A, CRMP2B, and CRMP5 were equally distributed throughout cell bodies, axons, or dendrites of neurons, whereas CRMP2A and CRMP5 were completely absent from Purkinje cerebellar cells in 12‐day‐old animals. By comparison, oligodendrocytes exclusively express CRMP2B and CRMP5 in cell bodies and processes both in situ in the adult brain and in primary cultures. Overall, our results demonstrate specific subcellular localizations of CRMP1, CRMP2A, CRMP2B, and CRMP5 depending on cell types, neuronal compartment, and developmental stage. This study suggests that, beyond their signalling function in axon outgrowth and guidance, CRMPs also play a role in mature neurons both in axons and in dendrites. J. Comp. Neurol. 486:1–17, 2005. © 2005 Wiley‐Liss, Inc. |
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Bibliography: | istex:F1829FA9C8740CC263F19E0497163E06A2E5FE8F ArticleID:CNE20465 Institut National de la Santé et de la Recherche Médicale Collège de France ark:/67375/WNG-WK5R75P6-D Délégation Générale de l'Armement The last two authors equally supervised this work. The first two authors contributed equally to this work. ObjectType-Article-2 SourceType-Scholarly Journals-1 ObjectType-Feature-1 content type line 23 ObjectType-Article-1 ObjectType-Feature-2 |
ISSN: | 0021-9967 1096-9861 |
DOI: | 10.1002/cne.20465 |