ZFIN ID: ZDB-PUB-180628-3
Cxcl12a induces snail1b expression to initiate collective migration and sequential Fgf-dependent neuromast formation in the zebrafish posterior lateral line primordium.
Neelathi, U.M., Dalle Nogare, D., Chitnis, A.B.
Date: 2018
Source: Development (Cambridge, England)   145(14): (Journal)
Registered Authors: Chitnis, Ajay
Keywords: Cell adhesion molecule, Collective migration, Cxcl12a, Lateral line primordium, Zebrafish, snail1b
MeSH Terms:
  • Animals
  • Cell Movement/drug effects
  • Cell Movement/genetics*
  • Chemokine CXCL2/metabolism*
  • Chemokines/metabolism
  • Embryo, Nonmammalian/cytology
  • Embryo, Nonmammalian/metabolism
  • Fibroblast Growth Factors/metabolism*
  • Gene Expression Regulation, Developmental/drug effects
  • Lateral Line System/cytology
  • Lateral Line System/drug effects
  • Lateral Line System/embryology*
  • Lateral Line System/metabolism
  • Models, Biological
  • Morpholinos/pharmacology
  • Nervous System/cytology
  • Nervous System/embryology*
  • Stem Cells/cytology
  • Stem Cells/drug effects
  • Stem Cells/metabolism
  • Time-Lapse Imaging
  • Wnt Signaling Pathway/drug effects
  • Zebrafish/embryology*
  • Zebrafish/genetics
  • Zebrafish Proteins/genetics*
  • Zebrafish Proteins/metabolism
PubMed: 29945870 Full text @ Development
FIGURES
ABSTRACT
The zebrafish posterior lateral line primordium migrates along a path defined by the chemokine Cxcl12a, periodically depositing neuromasts, to pioneer formation of the zebrafish posterior lateral line system. snail1b, known for its role in promoting cell migration, is expressed in leading cells of the primordium in response to Cxcl12a, whereas its expression in trailing cells is inhibited by Fgf signaling. snail1b knockdown delays initiation of primordium migration. This delay is associated with aberrant expansion of epithelial cell adhesion molecule (epcam) and reduction of cadherin 2 expression in the leading part of the primordium. Co-injection of snail1b morpholino with snail1b mRNA prevents the initial delay in migration and restores normal expression of epcam and cadherin 2 The delay in initiating primordium migration in snail1b morphants is accompanied by a delay in sequential formation of trailing Fgf signaling centers and associated protoneuromasts. This delay is not specifically associated with knockdown of snail1b but also with other manipulations that delay migration of the primordium. These observations reveal an unexpected link between the initiation of collective migration and sequential formation of protoneuromasts in the primordium.
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