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The planar cell polarity pathway and parietal endoderm cell migration

Kristi Lamonica1, Laura Grabel

  • 1Department of Craniofacial Biology, School of Dental Medicine, University of Colorado Denver, Anschutz Medical Campus, Aurora, CO, USA.

Methods in Molecular Biology (Clifton, N.J.)
|January 6, 2012
PubMed

Insights

Parietal endoderm cell migration relies on the Planar Cell Polarity (PCP) pathway. Wnt inhibition disrupts cell orientation and migration, highlighting non-canonical Wnt/PCP signaling

Area of Science:

  • Developmental biology
  • Cell biology
  • Embryogenesis

Background:

  • Parietal endoderm (PE) cell migration is crucial for mammalian embryonic development, forming the parietal yolk sac.
  • The F9 teratocarcinoma stem cell model system provides an in vitro platform to study PE migration dynamics.

Purpose of the Study:

  • To investigate the molecular mechanisms directing parietal endoderm cell migration.
  • To elucidate the role of the Planar Cell Polarity (PCP) pathway and Rho/ROCK signaling in PE orientation.

Main Methods:

  • Utilized the F9 teratocarcinoma stem cell model for in vitro studies.
  • Manipulated Wnt signaling using sFRP and assessed cell migration and orientation.
  • Analyzed Golgi apparatus localization, microtubule organization, and focal adhesions.
  • Investigated the involvement of small GTPases (Rho/ROCK, Rac) in PCP signaling.

Main Results:

  • Wnt inhibition via sFRP led to a loss of migratory orientation and disorganized cellular structures.
  • Rho/ROCK pathway inhibition resulted in impaired cell orientation, while Rac inhibition had no significant effect.
  • Non-canonical Wnt/PCP signaling was identified as a key regulator of oriented PE migration.

Conclusions:

  • Non-canonical Wnt/PCP signaling, mediated by Rho/ROCK, is essential for directing parietal endoderm cell migration.
  • Disruption of this pathway leads to loss of cell polarity and disorganized migration patterns.
  • Findings provide insights into the fundamental processes governing early embryonic cell movements.

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