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Related Experiment Video

Updated: Apr 21, 2026

Imaging the Human Immunological Synapse
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Imaging the Human Immunological Synapse

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Contact time periods in immunological synapse.

Daniel R Bush1, Amit K Chattopadhyay1

  • 1Non-linearity and Complexity Research Group - Aston University, Aston Triangle, Birmingham B4 7ET, United Kingdom.

Physical Review. E, Statistical, Nonlinear, and Soft Matter Physics
|November 7, 2014
PubMed
Summary

The immunological synapse forms in seconds, not minutes. Model calculations reveal T-cell receptor (TCR) and integrin bond distances critically influence synapse formation time scales.

Area of Science:

  • Immunology
  • Biophysics
  • Computational Biology

Background:

  • The immunological synapse is crucial for T cell-mediated immunity.
  • Its formation time scale has been a long-standing debate in immunology.
  • Understanding synapse dynamics is key to deciphering immune response initiation.

Purpose of the Study:

  • To resolve the debate on the time scale for immunological synapse onset.
  • To investigate the relationship between molecular bond distances and synapse formation time.
  • To identify key factors governing stable synapse formation.

Main Methods:

  • Developed a computational model to calculate the time scale 〈τ〉 of synapse onset.
  • Analyzed the influence of spatial thresholds of integrin:ligand and T-cell receptor (TCR):peptide-major-histocompatibility-complex (pMHC) bonds.

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  • Investigated the role of coreceptor bond length separation (δ) and TCR:pMHC bond distance (Δ1).

    • Main Results:

    • Model calculations indicate the synapse forms on the order of seconds, significantly faster than previously thought.
    • Synapse onset time 〈τ〉 increases with coreceptor bond length separation (δ) near critical thresholds.
    • 〈τ〉 decays with increasing TCR:pMHC bond distance (Δ1) for a fixed integrin:ligand distance (Δ2).

    Conclusions:

    • The immunological synapse formation is a rapid process occurring in seconds.
    • Spatial configurations of molecular bonds, particularly TCR:pMHC and integrin:ligand pairs, dictate synapse stability.
    • The T-cell receptor:peptide-major-histocompatibility-complex bond is a likely candidate for stable synapse formation due to its properties.