ZFIN ID: ZDB-PUB-981208-33
Induction of alpha1-tubulin gene expression during development and regeneration of the fish central nervous system
Hieber, V., Dai, X.H., Foreman, M., and Goldman, D.
Date: 1998
Source: Journal of neurobiology   37: 429-440 (Journal)
Registered Authors: Dai, Xinhua, Goldman, Dan
Keywords: CNS development; tubulin; gene expression; regeneration; zebrafish
MeSH Terms:
  • Animals
  • Base Sequence
  • Central Nervous System/physiology*
  • Gene Expression Regulation, Developmental/physiology*
  • Genetic Linkage
  • Genome
  • Goldfish/genetics
  • Goldfish/physiology*
  • In Situ Hybridization
  • Molecular Sequence Data
  • Nerve Regeneration*
  • Optic Nerve Injuries
  • Promoter Regions, Genetic
  • Retinal Ganglion Cells/metabolism
  • Ribonucleases
  • Transcriptional Activation
  • Tubulin/genetics*
  • Zebrafish/genetics
  • Zebrafish/physiology*
PubMed: 9828048 Full text @ J. Neurobiol.
ABSTRACT
The alpha1- and alpha2-tubulin encoding genes were cloned from a goldfish genomic DNA library. alpha1- and alpha2-tubulin RNA expression was examined in developing and adult retinas. These studies demonstrated increased alpha1-tubulin RNA in presumptive ganglion cells that grow axons early in retinal development and in adult retinal ganglion cells whose optic axons had been damaged. The alpha2-tubulin RNA was undetectable in developing retina and constitutively expressed in adult retinal ganglion cells regardless of optic nerve crush. To determine if these changes in alpha1-tubulin RNA reflected changes in alpha1-tubulin promoter activity, we introduced into zebrafish embryos and adult goldfish retinal explants expression vectors harboring the alpha1-tubulin gene's promoter. These studies showed that the alpha1-tubulin promoter confers a developmentally regulated, neuron-restricted pattern of reporter gene expression in vivo and its activity is increased in adult retinal neurons induced to regenerate their axons. Promoter deletions defined regions of alpha1-tubulin DNA necessary for this pattern of expression. These results suggest that DNA sequences necessary for alpha1-tubulin gene induction during central nervous system development and regeneration are contained within the alpha1-tubulin gene's 5'-flanking DNA and that this promoter will be useful for identifying these elements and their DNA binding proteins.
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