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Intertissue mechanical interactions shape the olfactory circuit in zebrafish.

Pauline Monnot1,2,3, Girisaran Gangatharan1, Marion Baraban1,3

  • 1Centre National de la Recherche Scientifique (CNRS), Institut de Biologie Paris-Seine (IBPS), Developmental Biology Laboratory, Sorbonne Université, Paris, France.

EMBO Reports
|December 10, 2021
PubMed
Summary
This summary is machine-generated.

Mechanical forces from developing eye tissue guide olfactory placode cell movement and axon growth in zebrafish. This study highlights how tissue interactions shape neuronal circuits.

Keywords:
extracellular matrixeyemechanical forceolfactory circuitplacode

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Area of Science:

  • Neuroscience
  • Developmental Biology
  • Biophysics

Background:

  • Neuronal migration and axon elongation are crucial for nervous system development.
  • Chemical signals are well-studied, but mechanical cues' roles in vivo are less understood.
  • Olfactory placode morphogenesis involves complex cell movements and axon extension.

Purpose of the Study:

  • To investigate the influence of mechanical forces on neuronal movements and axon extension during olfactory placode development in zebrafish.
  • To elucidate the specific role of the adjacent developing eye tissue in guiding these processes.
  • To understand the contribution of intertissue mechanical interactions to neuronal circuit formation.

Main Methods:

  • Quantitative analysis of cell migration patterns within the olfactory placode.
  • Biomechanical manipulation to assess the impact of mechanical forces.
  • In vivo imaging and analysis in zebrafish models.

Main Results:

  • The developing eye tissue exerts lateral traction forces on the olfactory placode.
  • These forces are transmitted via the extracellular matrix.
  • Mechanical cues from the eye are essential for proper morphogenetic movements and axon extension within the placode.

Conclusions:

  • Mechanical interactions between developing tissues are critical for sculpting neuronal circuits.
  • Intertissue mechanical forces play a significant role in guiding neuronal development, complementing chemical signaling.
  • This study reveals a novel mechanism of mechanical guidance in the formation of the nervous system.