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Related Concept Videos

Chemical Synapses01:26

Chemical Synapses

Chemical synapses are specialized sites between two neurons or between a neuron and a non-neuronal cell like a muscle, glandular or sensory cell.
Because chemical synapses depend on the release of neurotransmitter molecules from synaptic vesicles to pass on their signal, there is an approximately one millisecond delay between when the axon potential reaches the presynaptic terminal and when the neurotransmitter leads to opening of postsynaptic ion channels. Additionally, this signaling is...
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Integration of Synaptic Events01:28

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Synaptic integration mainly includes the summation of graded potentials. Graded potentials, regardless of their type, cause subtle alterations in membrane voltage, resulting in either depolarization or hyperpolarization. These incremental changes, when combined or summed, can propel the neuron toward its threshold. Consider, for example, a membrane experiencing a +15 mV shift, causing it to depolarize from -70 mV to -55 mV. In this scenario, graded potentials govern the membrane's ability to...
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Related Experiment Video

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Qualitative and Quantitative Analysis of the Immune Synapse in the Human System Using Imaging Flow Cytometry
08:35

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Published on: January 7, 2019

Immunological synapses: breaking up may be good to do.

Matthew F Krummel1

  • 1The Department of Pathology, University of California, San Francisco, 513 Parnassus Avenue, San Francisco, CA 94143-0511, USA. matthew.krummel@ucsf.edu

Cell
|May 22, 2007
PubMed
Summary

Naïve T cells form transient interactions with antigen-presenting cells due to protein kinase C theta (PKCθ), which destabilizes the synapse. The actin regulator WASp is involved in re-establishing these crucial T cell interactions.

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Area of Science:

  • Immunology
  • Cell Biology
  • Molecular Biology

Background:

  • T cells interact with antigen-presenting cells (APCs) through immunological synapses.
  • Activated T cells form stable synapses, while naïve T cells exhibit transient interactions.

Purpose of the Study:

  • To investigate the molecular mechanisms underlying the transient interactions of naïve T cells with APCs.
  • To identify key regulators of immunological synapse stability and T cell migration.

Main Methods:

  • The study likely involved in vitro assays examining T cell-APC interactions.
  • Investigated the role of specific kinases and actin regulators in synapse dynamics.

Main Results:

  • Protein kinase C theta (PKCθ) was identified as a key factor destabilizing the immunological synapse in naïve T cells.
  • The actin regulator WASp (Wiskott-Aldrich syndrome protein) was implicated in the re-establishment of stable T cell-APC synapses.

Conclusions:

  • PKCθ actively destabilizes the synapse, facilitating T cell migration and immune surveillance.
  • WASp plays a critical role in stabilizing the synapse, enabling sustained T cell-APC communication.