ZFIN ID: ZDB-PUB-081218-29
Her4 is necessary for establishing peripheral projections of the trigeminal ganglia in zebrafish
So, J.H., Chun, H.S., Bae, Y.K., Kim, H.S., Park, Y.M., Huh, T.L., Chitnis, A.B., Kim, C.H., and Yeo, S.Y.
Date: 2009
Source: Biochemical and Biophysical Research Communications   379(1): 22-26 (Journal)
Registered Authors: Bae, Young Ki, Chitnis, Ajay, Huh, Tae-Lin, So, Ju-Hoon
Keywords: Her4, Zebrafish, Notch signaling, Trigeminal ganglia, Neural progenitor, Peripheral projections
MeSH Terms:
  • Animals
  • Axons/metabolism
  • Axons/physiology
  • Basic Helix-Loop-Helix Transcription Factors/genetics*
  • Basic Helix-Loop-Helix Transcription Factors/metabolism
  • Cell Differentiation/genetics
  • Nerve Tissue Proteins/metabolism
  • Receptors, Notch/metabolism
  • Sensory Receptor Cells/metabolism
  • Transcription, Genetic*
  • Trigeminal Ganglion/cytology
  • Trigeminal Ganglion/growth & development*
  • Trigeminal Ganglion/metabolism
  • Zebrafish/genetics
  • Zebrafish/growth & development*
  • Zebrafish Proteins/genetics*
  • Zebrafish Proteins/metabolism
PubMed: 19084503 Full text @ Biochem. Biophys. Res. Commun.
Transcripts of notch and its target genes have been detected in some differentiating neurons. However, the role of Notch in neuronal differentiation remains poorly defined. Here, we show that a subset of differentiating sensory neurons in the trigeminal ganglia express her4. Expression of her4 requires Notch signaling during neurogenesis but not during differentiation, when peripheral projections of the trigeminal ganglia are established. These projections develop poorly in her4 morphants. While many components of the canonical Notch signaling pathway are not required for late her4 expression or peripheral axon outgrowth in trigeminal neurons, simultaneous knock-down of Notch receptors prevents establishment of these peripheral projections. These observations suggest that Her4 and Notch play a role in peripheral outgrowth of sensory neurons.