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Journal of Neuroscience, Vol 14, 3475-3486, Copyright © 1994 by Society for Neuroscience
Combinatorial expression of three zebrafish genes related to distal- less: part of a homeobox gene code for the head
MA Akimenko, M Ekker, J Wegner, W Lin and M Westerfield
Loeb Institute for Medical Research, Ottawa, Ontario, Canada.
We describe analysis of zebrafish distal-less-related homeobox genes that
may serve as specifiers of positional information in anterior regions of
the CNS and in peripheral structures. We isolated three zebrafish genes,
dlx2, dlx3, and dlx4, by screening embryonic cDNA libraries. Comparisons of
the predicted sequences of the Dlx2, Dlx3, and Dlx4 proteins with
distal-less proteins from other species suggest that vertebrate distal-less
genes can be divided into four orthologous groups. We observed similarities
but also unique features of the expression patterns of the zebrafish dlx
genes. Among the three genes, dlx3 alone is expressed during gastrulation.
Shortly after gastrulation, cells in the ventral forebrain rudiment express
dlx2 and dlx4, but not dlx3, and hindbrain neural crest cells express only
dlx2. Presumptive precursor cells of the olfactory placodes express dlx3
and dlx4 but not dlx2. Transcripts of dlx3 and dlx4 are present in
overlapping subsets of cells in the auditory vesicle and in cells of the
median fin fold, whereas dlx2 is never expressed in the auditory vesicle
and only at low levels in localized regions of the median fin fold. Cells
of the visceral arches and their primordia express all three dlx genes, but
with different developmental time courses. We suggest that combinatorial
expression of the dlx genes is part of a homeobox gene code specifying
pattern formation or cell fate determination in the forebrain, in
peripheral structures of the head, and in the fins.
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December 1, 2003;
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J. Holzschuh, A. Barrallo-Gimeno, A.-K. Ettl, K. Durr, E. W. Knapik, and W. Driever
Noradrenergic neurons in the zebrafish hindbrain are induced by retinoic acid and require tfap2a for expression of the neurotransmitter phenotype
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December 1, 2003;
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J. Walshe and I. Mason
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Development,
September 15, 2003;
130(18):
4337 - 4349.
[Abstract]
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F. Carreira-Barbosa, M. L. Concha, M. Takeuchi, N. Ueno, S. W. Wilson, and M. Tada
Prickle 1 regulates cell movements during gastrulation and neuronal migration in zebrafish
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September 1, 2003;
130(17):
4037 - 4046.
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S. Fischer, B. W. Draper, and C. J. Neumann
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August 1, 2003;
130(15):
3515 - 3524.
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J. Holzschuh, G. Hauptmann, and W. Driever
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J. Neurosci.,
July 2, 2003;
23(13):
5507 - 5519.
[Abstract]
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R. M. Nissen, J. Yan, A. Amsterdam, N. Hopkins, and S. M. Burgess
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June 1, 2003;
130(11):
2543 - 2554.
[Abstract]
[Full Text]
[PDF]
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T. Xiao, W. Shoji, W. Zhou, F. Su, and J. Y. Kuwada
Transmembrane Sema4E Guides Branchiomotor Axons to Their Targets in Zebrafish
J. Neurosci.,
May 15, 2003;
23(10):
4190 - 4198.
[Abstract]
[Full Text]
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May 15, 2003;
130(10):
2173 - 2186.
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P. C. Yelick and T. F. Schilling
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2,3,7,8-Tetrachlorodibenzo-p-dioxin Toxicity in the Zebrafish Embryo: Altered Regional Blood Flow and Impaired Lower Jaw Development
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A zebrafish sox9 gene required for cartilage morphogenesis
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January 11, 2002;
129(21):
5065 - 5079.
[Abstract]
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G. Panganiban and J. L. R. Rubenstein
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January 10, 2002;
129(19):
4371 - 4386.
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N. B. David, L. Saint-Etienne, M. Tsang, T. F. Schilling, and F. M. Rosa
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Development,
January 10, 2002;
129(19):
4457 - 4468.
[Abstract]
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D. M. Garrity, S. Childs, and M. C. Fishman
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Development,
January 10, 2002;
129(19):
4635 - 4645.
[Abstract]
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Concerted action of two dlx paralogs in sensory placode formation
Development,
January 7, 2002;
129(13):
3127 - 3136.
[Abstract]
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