BMP and FGF-2 regulate neurogenin-2 expression and the differentiation of sensory neurons and glia.
Dev Dyn
; 235(3): 646-55, 2006 Mar.
Article
de En
| MEDLINE
| ID: mdl-16425218
ABSTRACT
We have examined the effects of signaling molecules and Notch signaling on the mechanisms regulating neurogenin (ngn)-2 expression. This ngn-2 is a transcription factor that is essential for the specification of early differentiating sensory neurons in the dorsal root ganglia. In the presence of bone morphogenetic protein (BMP), anti-ngn-2-positive cells appeared in mouse trunk neural crest cell cultures, and they expressed Brn3, indicating that ngn-2-expressing cells are sensory neurons. These cells did not differentiate after fibroblast growth factor (FGF)-2 treatment or after Notch activation. The suppression of ngn-2 expression by FGF-2 was recovered by treatment with a Notch signaling inhibitor. Thus, FGF-2 may prevent ngn-2 expression through Notch activation. Whereas BMP-4 inhibited glial differentiation, FGF-2 promoted gliogenesis by means of Notch activation. Our data suggest that BMP and FGF-2 act as positive and negative regulators in ngn-2 expression, respectively, and that these signaling molecules regulate the differentiation of sensory neurons and glia.
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Collection:
01-internacional
Base de données:
MEDLINE
Sujet principal:
Différenciation cellulaire
/
Névroglie
/
Facteur de croissance fibroblastique de type 2
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Protéines morphogénétiques osseuses
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Facteurs de transcription à motif basique hélice-boucle-hélice
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Protéines de tissu nerveux
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Neurones afférents
Limites:
Animals
Langue:
En
Journal:
Dev Dyn
Sujet du journal:
ANATOMIA
Année:
2006
Type de document:
Article
Pays d'affiliation:
Japon