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Updated: Nov 19, 2025

Visualizing the Actin and Microtubule Cytoskeletons at the B-cell Immune Synapse Using Stimulated Emission Depletion STED Microscopy
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Dendritic cell actin dynamics control contact duration and priming efficiency at the immunological synapse

Alexander Leithner1,2, Lukas M Altenburger3, Robert Hauschild1

  • 1Institute of Science and Technology Austria, Klosterneuburg, Austria.

The Journal of Cell Biology
|February 3, 2021
PubMed

Insights

Dendritic cells

Area of Science:

  • Immunology
  • Cell Biology
  • Cytoskeletal Dynamics

Background:

  • Dendritic cells (DCs) initiate adaptive immunity by priming naive T cells at the immunological synapse (IS).
  • F-actin dynamics on the T cell side of the IS are well-studied, but the DC cytoskeletal role remains unclear.

Purpose of the Study:

  • To investigate the contribution of the dendritic cell actin cytoskeleton to immunological synapse formation and T cell priming.

Main Methods:

  • Utilized microscopy to observe DC actin dynamics at the IS.
  • Investigated the role of the WAVE regulatory complex (WRC) in DC cytoskeletal regulation.
  • Assessed T cell activation and proliferation following interaction with DCs lacking WRC.

Main Results:

  • DC actin cytoskeleton forms a multifocal synaptic structure crucial for T cell priming efficiency.
  • DC actin at the IS appears in transient foci regulated by the WAVE regulatory complex (WRC).
  • Absence of WRC in DCs leads to stabilized cell-cell contacts and reduced T cell activation and proliferation.

Conclusions:

  • The dendritic cell actin cytoskeleton, regulated by the WRC, is essential for dynamic IS formation.
  • DC cytoskeletal dynamics directly impact T cell priming efficiency by modulating cell-cell adhesion and synapse stability.

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