PUBLICATION
Bmp activity establishes a gradient of positional information throughout the entire neural plate
- Authors
- Barth, K.A., Kishimoto, Y., Rohr, K.B., Seydler, C., Schulte-Merker, S., and Wilson, S.W.
- ID
- ZDB-PUB-991102-17
- Date
- 1999
- Source
- Development (Cambridge, England) 126(22): 4977-4987 (Journal)
- Registered Authors
- Barth, Anukampa, Kishimoto, Yasuyuki, Rohr, Klaus, Schulte-Merker, Stefan, Wilson, Steve
- Keywords
- bone morophogenic protein; dorsoventral patterning; neural plate; swirl; somitabun; zebrafish
- MeSH Terms
-
- Animals
- Bone Morphogenetic Proteins/metabolism*
- Bone Morphogenetic Proteins/physiology
- Diencephalon/embryology
- Diencephalon/metabolism
- Ectoderm/physiology
- Neural Crest/embryology*
- Neural Crest/physiology
- Neurons/physiology*
- Phenotype
- Prosencephalon/embryology
- Signal Transduction
- Telencephalon/embryology
- Telencephalon/metabolism
- Zebrafish/embryology
- PubMed
- 10529416 Full text @ Development
Citation
Barth, K.A., Kishimoto, Y., Rohr, K.B., Seydler, C., Schulte-Merker, S., and Wilson, S.W. (1999) Bmp activity establishes a gradient of positional information throughout the entire neural plate. Development (Cambridge, England). 126(22):4977-4987.
Abstract
Bone morphogenetic proteins (Bmps) are key regulators of dorsoventral (DV) patterning. Within the ectoderm, Bmp activity has been shown to inhibit neural development, promote epidermal differentiation and influence the specification of dorsal neurons and neural crest. In this study, we examine the patterning of neural tissue in mutant zebrafish embryos with compromised Bmp signalling activity. We find that although Bmp activity does not influence anteroposterior (AP) patterning, it does affect DV patterning at all AP levels of the neural plate. Thus, we show that Bmp activity is required for specification of cell fates around the margin of the entire neural plate, including forebrain regions that do not form neural crest. Surprisingly, we find that Bmp activity is also required for patterning neurons at all DV levels of the CNS. In swirl/bmp2b(-) (swr(-)) embryos, laterally positioned sensory neurons are absent whereas more medial interneuron populations are hugely expanded. However, in somitabun(-) (sbn(-)) embryos, which probably retain higher residual Bmp activity, it is the sensory neurons and not the interneurons that are expanded. Conversely, in severely Bmp depleted embryos, both interneurons and sensory neurons are absent and it is the most medial neurons that are expanded. These results are consistent with there being a gradient of Bmp-dependent positional information extending throughout the entire neural and non-neural ectoderm.
Genes / Markers
Expression
Phenotype
Mutations / Transgenics
Human Disease / Model
Sequence Targeting Reagents
Fish
Orthology
Engineered Foreign Genes
Mapping