Actin dynamics modulate mechanosensitive immobilization of E-cadherin at adherens junctions

Nat Cell Biol. 2014 Jun;16(6):587-94. doi: 10.1038/ncb2973. Epub 2014 May 25.

Abstract

Mechanical stress is increasingly being shown to be a potent modulator of cell-cell junctional morphologies in developmental and homeostatic processes. Intercellular force sensing is thus expected to be an important regulator of cell signalling and tissue integrity. In particular, the interplay between myosin contractility, actin dynamics and E-cadherin recruitment largely remains to be uncovered. We devised a suspended cell doublet assay to quantitatively assess the correlation between myosin II activity and local E-cadherin recruitment. The single junction of the doublet exhibited a stereotypical morphology, with E-cadherin accumulating into clusters of varied concentrations at the rim of the circular contact. This local recruitment into clusters derived from the sequestration of E-cadherin through a myosin-II-driven modulation of actin turnover. We exemplify how the regulation of actin dynamics provides a mechanism for the mechanosensitive response of cell contacts.

Publication types

  • Research Support, Non-U.S. Gov't
  • Video-Audio Media

MeSH terms

  • Actins / metabolism*
  • Adherens Junctions / genetics
  • Adherens Junctions / metabolism*
  • Animals
  • Cadherins / genetics*
  • Cadherins / metabolism*
  • Cell Adhesion*
  • Cell Line, Tumor
  • Cell Shape
  • Green Fluorescent Proteins / genetics
  • Green Fluorescent Proteins / metabolism
  • Mechanotransduction, Cellular*
  • Mice
  • Myosin Type II / metabolism
  • Protein Transport
  • RNA Interference
  • Recombinant Fusion Proteins / metabolism
  • Sarcoma 180 / genetics
  • Sarcoma 180 / metabolism*
  • Stress, Mechanical
  • Time Factors
  • Transfection

Substances

  • Actins
  • Cadherins
  • Recombinant Fusion Proteins
  • Green Fluorescent Proteins
  • Myosin Type II