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Membrane trafficking of synaptic adhesion molecules.

Cristian A Bogaciu1, Silvio O Rizzoli1

  • 1Institute for Neuro- and Sensory Physiology and Biostructural Imaging of Neurodegeneration (BIN) Center, University Medical Center Göttingen, Göttingen, Germany.

The Journal of Physiology
|September 26, 2024
PubMed
Summary

Synaptic adhesion molecules, crucial for synapse formation, undergo endocytosis. Their recycling at synapses needs further investigation to understand receptor regulation.

Keywords:
adhesion moleculesdystroglycannetrin receptorneurexinneuroliginsynapse

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Area of Science:

  • Neuroscience
  • Cell Biology
  • Molecular Biology

Background:

  • Synapse formation and stabilization rely on adhesion molecules acting as surface receptors.
  • Endocytosis and recycling regulate surface receptor numbers in non-neuronal cells.
  • These membrane trafficking processes are understudied at the synapse.

Purpose of the Study:

  • To review current knowledge on membrane trafficking of prominent synaptic adhesion molecules.
  • To highlight the evidence for endocytosis and recycling of these molecules at the synapse.

Main Methods:

  • Literature review of studies on synaptic adhesion molecule trafficking.
  • Summarization of findings on endocytosis and recycling of specific adhesion molecules.

Main Results:

  • Evidence exists for endocytosis of many synaptic adhesion proteins, including dystroglycans, latrophilins, calsyntenins, netrins, teneurins, neurexins, neuroligins, and neuronal pentraxins.
  • Less evidence is available for the recycling of these molecules, potentially due to assay limitations.

Conclusions:

  • Membrane trafficking, particularly endocytosis, is a relevant process for synaptic adhesion molecules.
  • Further research, including development of specific assays, is needed to fully understand the recycling of these critical synaptic components.