PUBLICATION
Axis Specification in Zebrafish Is Robust to Cell Mixing and Reveals a Regulation of Pattern Formation by Morphogenesis
- Authors
- Fulton, T., Trivedi, V., Attardi, A., Anlas, K., Dingare, C., Arias, A.M., Steventon, B.
- ID
- ZDB-PUB-200620-23
- Date
- 2020
- Source
- Current biology : CB 30(15): 2984-2994.e3 (Journal)
- Registered Authors
- Keywords
- explant, gastrulation, hindbrain patterning, organiser, pattern emergence, pescoid
- MeSH Terms
-
- Animals
- Body Patterning/genetics*
- Body Patterning/physiology*
- Cell Communication/physiology
- Cell Polarity
- Embryo, Nonmammalian/cytology*
- Embryo, Nonmammalian/embryology*
- Morphogenesis/genetics*
- Morphogenesis/physiology*
- RNA, Messenger
- Wnt Signaling Pathway/physiology
- Zebrafish/embryology*
- beta Catenin/metabolism
- PubMed
- 32559447 Full text @ Curr. Biol.
Citation
Fulton, T., Trivedi, V., Attardi, A., Anlas, K., Dingare, C., Arias, A.M., Steventon, B. (2020) Axis Specification in Zebrafish Is Robust to Cell Mixing and Reveals a Regulation of Pattern Formation by Morphogenesis. Current biology : CB. 30(15):2984-2994.e3.
Abstract
A fundamental question in developmental biology is how the early embryo establishes the spatial coordinate system that is later important for the organization of the embryonic body plan. Although we know a lot about the signaling and gene-regulatory networks required for this process, much less is understood about how these can operate to pattern tissues in the context of the extensive cell movements that drive gastrulation. In zebrafish, germ layer specification depends on the inheritance of maternal mRNAs [1-3], cortical rotation to generate a dorsal pole of β-catenin activity [4-8], and the release of Nodal signals from the yolk syncytial layer (YSL) [9-12]. To determine whether germ layer specification is robust to altered cell-to-cell positioning, we separated embryonic cells from the yolk and allowed them to develop as spherical aggregates. These aggregates break symmetry autonomously to form elongated structures with an anterior-posterior pattern. Both forced reaggregation and endogenous cell mixing reveals how robust early axis specification is to spatial disruption of maternal pre-patterning. During these movements, a pole of Nodal signaling emerges that is required for explant elongation via the planar cell polarity (PCP) pathway. Blocking of PCP-dependent elongation disrupts the shaping of opposing poles of BMP and Wnt/TCF activity and the anterior-posterior patterning of neural tissue. These results lead us to suggest that embryo elongation plays a causal role in timing the exposure of cells to changes in BMP and Wnt signal activity during zebrafish gastrulation. VIDEO ABSTRACT.
Errata / Notes
This article is corrected by ZDB-PUB-200805-11.
Genes / Markers
Expression
Phenotype
Mutations / Transgenics
Human Disease / Model
Sequence Targeting Reagents
Fish
Orthology
Engineered Foreign Genes
Mapping