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Vangl2 regulates E-cadherin in epithelial cells.

Tadahiro Nagaoka1, Ayumu Inutsuka2, Khadiza Begum3

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Planar cell polarity regulator Vangl2 controls E-cadherin internalization in epithelial cells. Vangl2 enhances E-cadherin endocytosis, impacting cell adhesion and signaling.

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Area of Science:

  • Cell Biology
  • Developmental Biology
  • Molecular Biology

Background:

  • E-cadherin is vital for epithelial adherens junctions.
  • Planar cell polarity (PCP) regulates tissue development.
  • Vangl2 is a key regulator of PCP in vertebrates.

Purpose of the Study:

  • To investigate the role of Vangl2 in controlling E-cadherin.
  • To elucidate the molecular mechanisms linking Vangl2 and E-cadherin.
  • To understand Vangl2's function in regulating cell surface proteins.

Main Methods:

  • Co-immunoprecipitation assays using embryonic kidney extracts and transfected fibroblasts.
  • Overexpression studies of Vangl2 in epithelial cells.
  • Analysis of renal epithelial cells from Vangl2 mutant mice.
  • Investigation of Vangl2 endocytosis pathways (Rab5, Dynamin).

Main Results:

  • E-cadherin co-immunoprecipitates with Vangl2.
  • Vangl2 overexpression enhances E-cadherin internalization.
  • Vangl2 mutant cells show increased cell surface E-cadherin.
  • Vangl2 undergoes Rab5- and Dynamin-dependent endocytosis.

Conclusions:

  • Vangl2 enhances the internalization of E-cadherin in epithelial cells.
  • This Vangl2 function may regulate intercellular PCP signaling.
  • Vangl2's role in protein internalization could mediate PCP-related cell adhesion rearrangements.