PUBLICATION

Mutation of the zebrafish glass onion locus causes early cell-nonautonomous loss of neuroepithelial integrity followed by severe neuronal patterning defects in the retina

Authors
Pujic, Z. and Malicki, J.
ID
ZDB-PUB-010507-1
Date
2001
Source
Developmental Biology   234(2): 454-469 (Journal)
Registered Authors
Malicki, Jarema, Pujic, Zac
Keywords
eye; mutant; glo; patterning; neuroepithelium
MeSH Terms
  • Animals
  • Antigens, Differentiation
  • Body Patterning
  • Cell Communication
  • Cell Polarity
  • Epithelial Cells
  • Head/embryology
  • Head/pathology
  • Morphogenesis
  • Mutation*
  • Nervous System/embryology*
  • Nervous System/pathology
  • Neurons/pathology
  • Phenotype
  • Retina/embryology*
  • Retina/pathology
  • Zebrafish/genetics*
PubMed
11397013 Full text @ Dev. Biol.
Abstract
Mutation of the glass onion locus causes drastic neuronal patterning defects in the zebrafish retina and brain. The precise stratified appearance of the wild-type retina is absent in the mutants. The glass onion phenotype is first visible shortly after the formation of optic primordia and is characterized by the rounding of cells and disruption of the ventricular surface in the eye and brain neuroepithelia. With exception of the dorsal- and ventral-most regions of the brain, neuroepithelial cells lose their integrity and begin to distribute ectopically. At later stages, the laminar patterning of retinal neurons is severely disrupted. Despite the lack of lamination, individual retinal cell classes differentiate in the glass onion retina. Mosaic analysis reveals that the glass onion mutation acts cell nonautonomously within the retina and brain, as neuroepithelial cell morphology and polarity in these tissues are normal when mutant cells develop in wild-type hosts. We conclude that the glass onion mutation affects cell-cell signaling event(s) involved in the maintenance of the neuroepithelial cell layer shortly after its formation. The disruption of neuroepithelial integrity may be the cause of the neuronal patterning defects following neurogenesis. In addition, the expression of the glass onion phenotype in a subset of neuroepithelial cells as well as its onset following the initial formation of the neuroepithelial sheets indicate the presence of genetically distinct temporal and spatial subdivisions in the development of this histologically uniform tissue.
Genes / Markers
Figures
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Expression
Phenotype
Mutations / Transgenics
Human Disease / Model
Sequence Targeting Reagents
Fish
Antibodies
Orthology
Engineered Foreign Genes
Mapping