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Related Experiment Video

Updated: Jan 20, 2026

Imaging the Human Immunological Synapse
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The MTOC/Golgi Complex at the T-Cell Immunological Synapse.

Meritxell Roig-Martinez1, Elena Saavedra-Lopez1, Paola V Casanova1

  • 1Institut de Neurociències, Neuroimmunity Research Group, Department of Biochemistry and Molecular Biology, School of Medicine, Lab M2-107, Universitat Autònoma de Barcelona, Barcelona, Spain.

Results and Problems in Cell Differentiation
|August 23, 2019
PubMed
Summary

T cells dynamically switch between immunological synapse (IS) and immunological kinapse (IK) states. This switch, orchestrated by the MTOC/Golgi complex, is crucial for effective immune responses and tissue navigation.

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Area of Science:

  • Immunology
  • Cell Biology
  • Biophysics

Background:

  • T cells are critical for adaptive immunity, surveying tissues for antigens.
  • Upon activation, T cells form an immunological synapse (IS) for targeted communication.
  • The IS involves polarized microtubule-organizing center (MTOC) and Golgi apparatus for molecule distribution and effector function.

Purpose of the Study:

  • To elucidate the dynamic structural rearrangements of T cells during immune surveillance and response.
  • To understand the transition between the activated IS state and the migratory IK state.
  • To highlight the role of the MTOC/Golgi complex in orchestrating these cellular states.

Main Methods:

  • The study likely involves advanced microscopy techniques to visualize T cell structures in real-time.
  • Analysis of molecular distribution within supramolecular activation clusters (SMACs) during IS and IK states.
  • Investigating the functional role of MTOC and Golgi polarization in T cell motility and effector functions.

Main Results:

  • T cells transition from a polarized IS state to a migratory immunological kinapse (IK) state after antigen encounter.
  • The MTOC and Golgi apparatus are repositioned to the rear of the T cell during the IK state to facilitate motility.
  • The symmetrical SMAC organization in the IS is broken and redistributed in the IK state.

Conclusions:

  • The MTOC/Golgi complex is a central regulator of T cell structural dynamics, enabling switching between IS and IK states.
  • This dynamic plasticity is essential for T cells to effectively patrol tissues, engage targets, and migrate.
  • Understanding these states is key to comprehending the overall efficacy of the immune response.