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SCRIB controls apical contractility during epithelial differentiation.

Batiste Boëda1, Vincent Michel2, Raphael Etournay3

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|November 6, 2023
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Summary
This summary is machine-generated.

SCRIB gene mutations cause organ defects. Our study reveals SCRIB controls gut epithelial shape by regulating apical contractility during cell differentiation, impacting myosin light chain activity.

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Area of Science:

  • Cell Biology
  • Developmental Biology
  • Genetics

Background:

  • Mutations in the SCRIB gene are linked to diverse morphological organ defects in vertebrates.
  • The precise molecular mechanisms connecting SCRIB to organ shape determination are not fully understood.

Purpose of the Study:

  • To investigate the role of SCRIB in the morphogenesis of gut epithelium using an organ-on-chip model.
  • To elucidate the molecular pathways influenced by SCRIB during epithelial development.

Main Methods:

  • Utilized an organ-on-chip model to study SCRIB knockout (KO) gut-like epithelia.
  • Performed cell differentiation assays on filters to analyze apical cell shape and polarity.
  • Investigated the molecular interactions of SCRIB with SHROOM2/4 and ROCK1.

Main Results:

  • SCRIB KO epithelia exhibited a flatter morphology with a reduced apical surface area.
  • SCRIB is essential for controlling apical cell shape and basoapical polarization of myosin light chain localization and activity.
  • Identified a conserved SHROOM binding site in SCRIB required for its function in apical cell shape regulation.

Conclusions:

  • SCRIB is a critical regulator of epithelial morphogenesis.
  • SCRIB controls epithelial apical contractility during cell differentiation through interactions with SHROOM2/4 and ROCK1.