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Pitx2c orchestrates embryonic axis extension via mesendodermal cell migration.

Michelle M Collins1, Hans-Martin Maischein1, Pascale Dufourcq2

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Summary
This summary is machine-generated.

Pitx2c, a transcription factor, is crucial for zebrafish body axis development. This study reveals its novel role in regulating mesendodermal cell migration during gastrulation, impacting morphogenesis.

Keywords:
Pitx2ccell migrationchemokine signalingdevelopmental biologygastrulationintegrin-fibronectin interactionzebrafish

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Area of Science:

  • Developmental Biology
  • Molecular Genetics

Background:

  • Pitx2c is known for left-right patterning.
  • Early gastrulation expression suggests unexplored roles.

Purpose of the Study:

  • Investigate Pitx2c's function during zebrafish gastrulation.
  • Identify downstream pathways regulating cell migration and morphogenesis.

Main Methods:

  • Zebrafish maternal-zygotic pitx2c mutants were analyzed.
  • Live imaging tracked mesendodermal cell migration.
  • Transcriptomic analysis identified gene expression changes.

Main Results:

  • Mutants showed shortened body axis and defective convergence and extension (CE).
  • Reduced mesendodermal cell migration persistence was observed.
  • Pitx2c non-cell-autonomously modulated cell shape and protrusion.

Conclusions:

  • Pitx2c regulates mesendodermal migration via cell shape and protrusive activity.
  • Identified downstream targets in the chemokine-ECM-integrin network.
  • Established novel roles for Pitx2c in early embryogenesis and morphogenesis.