Netrin1/DCC signaling promotes neuronal migration in the dorsal spinal cord.
Neural Dev
; 11(1): 19, 2016 10 26.
Article
em En
| MEDLINE
| ID: mdl-27784329
ABSTRACT
BACKGROUND:
Newborn neurons often migrate before undergoing final differentiation, extending neurites, and forming synaptic connections. Therefore, neuronal migration is crucial for establishing neural circuitry during development. In the developing spinal cord, neuroprogenitors first undergo radial migration within the ventricular zone. Differentiated neurons continue to migrate tangentially before reaching the final positions. The molecular pathways that regulate these migration processes remain largely unknown. Our previous study suggests that the DCC receptor is important for the migration of the dorsal spinal cord progenitors and interneurons. In this study, we determined the involvement of the Netrin1 ligand and the ROBO3 coreceptor in the migration.RESULTS:
By pulse labeling neuroprogenitors with electroporation, we examined their radial migration in Netrin1 (Ntn1), Dcc, and Robo3 knockout mice. We found that all three mutants exhibit delayed migration. Furthermore, using immunohistochemistry of the BARHL2 interneuron marker, we found that the mediolateral and dorsoventral migration of differentiated dorsal interneurons is also delayed. Together, our results suggest that Netrin1/DCC signaling induce neuronal migration in the dorsal spinal cord.CONCLUSIONS:
Netrin1, DCC, and ROBO3 have been extensively studied for their functions in regulating axon guidance in the spinal commissural interneurons. We reveal that during earlier development of dorsal interneurons including commissural neurons, these molecules play an important role in promoting cell migration.Palavras-chave
Texto completo:
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Base de dados:
MEDLINE
Assunto principal:
Medula Espinal
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Movimento Celular
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Receptores de Superfície Celular
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Proteínas Supressoras de Tumor
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Interneurônios
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Fatores de Crescimento Neural
Limite:
Animals
Idioma:
En
Revista:
Neural Dev
Ano de publicação:
2016
Tipo de documento:
Article
País de afiliação:
Estados Unidos