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Cadherin dimers in cell-cell adhesion.

Sergey Troyanovsky1

  • 1Department of Internal Medicine (Dermatology), Washington University Medical School, 660 South Euclid Ave, St. Louis, MO 63110, USA. sergeyt@im.wustl.edu

European Journal of Cell Biology
|April 12, 2005
PubMed
Summary

Cadherin-mediated cell adhesion is surprisingly strong, challenging previous theories. This suggests that breaking apart cadherin dimers, not clustering them, strengthens cell-cell junctions.

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Area of Science:

  • Cell Biology
  • Biophysics
  • Molecular Biology

Background:

  • Classic cadherins are crucial for cell-cell junctions, but their adhesion mechanism is not fully understood.
  • Cadherin-cadherin interactions are considered weak and strengthened by cytoskeletal clustering.
  • The dynamics of cadherin dimers in living cells are key to understanding adhesion strength.

Purpose of the Study:

  • To investigate the strength of cadherin homodimer interactions in living cells.
  • To explore the molecular mechanisms regulating cadherin dimer dynamics.
  • To re-evaluate the model of cadherin-based adhesion.

Main Methods:

  • In vivo examination of cadherin homodimers.
  • Analysis of cadherin dynamics within living cells.

Main Results:

  • Cadherin adhesive interactions in living cells are unexpectedly strong.
  • Adhesion strength appears to be regulated by processes that break down cadherin dimers.

Conclusions:

  • The strength of cell-cell adhesion is potentially regulated by cadherin dimer dissociation, not just clustering.
  • Further research into cadherin dimer structure and dynamics is needed to elucidate adhesion mechanisms.

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