PUBLICATION
Dual roles of zygotic and maternal Scribble1 in neural migration and convergent extension movements in zebrafish embryos
- Authors
- Wada, H., Iwasaki, M., Sato, T., Masai, I., Nishiwaki, Y., Tanaka, H., Sato, A., Nojima, Y., and Okamoto, H.
- ID
- ZDB-PUB-050419-6
- Date
- 2005
- Source
- Development (Cambridge, England) 132(10): 2273-2285 (Journal)
- Registered Authors
- Masai, Ichiro, Nishiwaki, Yuko, Okamoto, Hitoshi, Sato, Atsushi, Sato, Tomomi, Tanaka, Hideomi, Wada, Hironori
- Keywords
- Zebrafish, landlocked, scribble1, facial motor neuron, neuronal migration, convergent extension
- MeSH Terms
-
- Crosses, Genetic
- Oligonucleotides, Antisense
- Immunohistochemistry
- DNA Primers
- Zebrafish Proteins/genetics*
- Zebrafish Proteins/metabolism*
- Facial Nerve/embryology*
- Zebrafish/embryology*
- Membrane Proteins/genetics*
- Membrane Proteins/metabolism*
- Reverse Transcriptase Polymerase Chain Reaction
- Gastrula/metabolism
- Rhombencephalon/embryology
- Sequence Analysis, DNA
- Base Sequence
- Green Fluorescent Proteins/metabolism
- Molecular Sequence Data
- Motor Neurons/cytology*
- Animals
- In Situ Hybridization
- Chromosome Mapping
- Mutation/genetics
- Gene Expression Regulation, Developmental*
- Cell Movement/genetics
- Cell Movement/physiology*
- PubMed
- 15829519 Full text @ Development
Citation
Wada, H., Iwasaki, M., Sato, T., Masai, I., Nishiwaki, Y., Tanaka, H., Sato, A., Nojima, Y., and Okamoto, H. (2005) Dual roles of zygotic and maternal Scribble1 in neural migration and convergent extension movements in zebrafish embryos. Development (Cambridge, England). 132(10):2273-2285.
Abstract
In the developing vertebrate hindbrain, the characteristic trajectory of the facial (nVII) motor nerve is generated by caudal migration of the nVII motor neurons. The nVII motor neurons originate in rhombomere (r) 4, and migrate caudally into r6 to form the facial motor nucleus. In this study, using a transgenic zebrafish line that expresses green fluorescent protein (GFP) in the cranial motor neurons, we isolated two novel mutants, designated landlocked (llk) and off-road (ord), which both show highly specific defects in the caudal migration of the nVII motor neurons. We show that the landlocked locus contains the gene scribble1 (scrb1), and that its zygotic expression is required for migration of the nVII motor neurons mainly in a non cell-autonomous manner. Taking advantage of the viability of the llk mutant embryos, we found that maternal expression of scrb1 is required for convergent extension (CE) movements during gastrulation. Furthermore, we show a genetic interaction between scrb1 and trilobite(tri)/strabismus(stbm) in CE. The dual roles of the scrb1 gene in both neuronal migration and CE provide a novel insight into the underlying mechanisms of cell movement in vertebrate development.
Genes / Markers
Expression
Phenotype
Mutations / Transgenics
Human Disease / Model
Sequence Targeting Reagents
Fish
Orthology
Engineered Foreign Genes
Mapping