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Catch bonds: physical models and biological functions.

Cheng Zhu1, Rodger P McEver

  • 1Woodruff School of Mechanical Engineering, Georgia Institute of Technology, Atlanta, GA, USA.

Molecular & Cellular Biomechanics : MCB
|May 20, 2006
PubMed
Summary
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Force can unexpectedly prolong receptor-ligand bond lifetimes, a phenomenon termed catch bonds. This review covers recent evidence, theoretical models, and the role of catch bonds in flow-enhanced adhesion.

Area of Science:

  • Biophysics
  • Biochemistry
  • Cellular Mechanics

Background:

  • Receptor-ligand bonds typically shorten lifetimes under force.
  • Catch bonds represent a counterintuitive phenomenon where force prolongs bond lifetimes.
  • Slip bonds exhibit conventional force-dependent dissociation.

Purpose of the Study:

  • To review recent evidence for catch bonds.
  • To discuss theoretical models explaining catch bond behavior.
  • To explore the functional implications of catch bonds in biological systems.

Main Methods:

  • Review of recently published experimental data.
  • Analysis of theoretical models for catch bond mechanisms.
  • Examination of biological systems exhibiting catch bond behavior.

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Main Results:

  • Catch bonds have been experimentally observed in the selectin system.
  • Evidence suggests catch bonds may occur in other biological systems.
  • Catch bonds function as a mechanism for flow-enhanced adhesion.

Conclusions:

  • Catch bonds are a validated phenomenon in biophysics.
  • Understanding catch bonds is crucial for explaining flow-enhanced cell adhesion.
  • Further research is needed to explore catch bonds in diverse biological contexts.