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Journal of Neuroscience, Vol 10, 34-43, Copyright © 1990 by Society for Neuroscience
An identified motoneuron with variable fates in embryonic zebrafish
JS Eisen, SH Pike and B Romancier
Institute of Neuroscience, University of Oregon, Eugene 97403.
Every trunk hemisegment of the zebrafish is innervated by 3 identified
primary motoneurons whose development can be observed directly in living
embryos. In this paper, we describe another identified neuron that is part
of this system. Unlike the other primary motoneurons which are present in
all trunk hemisegments, this cell is present in slightly less than half of
the trunk hemisegments. Additionally, this cell has at least 2 different
fates: it may become a primary motoneuron and arborize in an exclusive
muscle territory, or it may die during embryonic development. We have named
this cell VaP, for variable primary. We show that the presence of VaP does
not affect the early development of the other primary motoneurons in the
same hemisegment. Moreover, we show that ablation of both VaP and caudal
primary does not alter pathfinding by another identified primary
motoneuron.
This article has been cited by other articles:
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Position fine-tuning of caudal primary motoneurons in the zebrafish spinal cord
Development,
January 15, 2008;
135(2):
323 - 332.
[Abstract]
[Full Text]
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K. A. Palaisa and M. Granato
Analysis of zebrafish sidetracked mutants reveals a novel role for Plexin A3 in intraspinal motor axon guidance
Development,
September 15, 2007;
134(18):
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S. A. Hutchinson and J. S. Eisen
Islet1 and Islet2 have equivalent abilities to promote motoneuron formation and to specify motoneuron subtype identity
Development,
June 1, 2006;
133(11):
2137 - 2147.
[Abstract]
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J. Zhang and M. Granato
The zebrafish unplugged gene controls motor axon pathway selection
Development,
May 15, 2000;
127(10):
2099 - 2111.
[Abstract]
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C. Beattie, E Melancon, and J. Eisen
Mutations in the stumpy gene reveal intermediate targets for zebrafish motor axons
Development,
January 6, 2000;
127(12):
2653 - 2662.
[Abstract]
[PDF]
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J Malicki and W Driever
oko meduzy mutations affect neuronal patterning in the zebrafish retina and reveal cell-cell interactions of the retinal neuroepithelial sheet
Development,
January 3, 1999;
126(6):
1235 - 1246.
[Abstract]
[PDF]
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E. Melancon, D. W. C. Liu, M. Westerfield, and J. S. Eisen
Pathfinding by Identified Zebrafish Motoneurons in the Absence of Muscle Pioneers
J. Neurosci.,
October 15, 1997;
17(20):
7796 - 7804.
[Abstract]
[Full Text]
[PDF]
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C. Beattie and J. Eisen
Notochord alters the permissiveness of myotome for pathfinding by an identified motoneuron in embryonic zebrafish
Development,
January 2, 1997;
124(3):
713 - 720.
[Abstract]
[PDF]
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B Appel, V Korzh, E Glasgow, S Thor, T Edlund, I. Dawid, and J. Eisen
Motoneuron fate specification revealed by patterned LIM homeobox gene expression in embryonic zebrafish
Development,
January 12, 1995;
121(12):
4117 - 4125.
[Abstract]
[PDF]
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S. Mango, C. Thorpe, P. Martin, S. Chamberlain, and B Bowerman
Two maternal genes, apx-1 and pie-1, are required to distinguish the fates of equivalent blastomeres in the early Caenorhabditis elegans embryo
Development,
January 8, 1994;
120(8):
2305 - 2315.
[Abstract]
[PDF]
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J. Eisen
Determination of primary motoneuron identity in developing zebrafish embryos
Science,
April 26, 1991;
252(5005):
569 - 572.
[Abstract]
[PDF]
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