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Neurons communicate with one another by passing on their electrical signals to other neurons. A synapse is the location where two neurons meet to exchange signals. At the synapse, the neuron that sends the signal is called the presynaptic cell, while the neuron that receives the message is called the postsynaptic cell. Note that most neurons can be both presynaptic and postsynaptic, as they both transmit and receive information.
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Cognitive development continues throughout adulthood, undergoing significant shifts across early, middle, and late stages. Individual transition occurs from adolescent idealism to pragmatic and adaptable thinking in early adulthood. During this period, individuals learn to integrate personal beliefs with the recognition that other perspectives are equally valid. Exposure to the complexities of modern society, diverse experiences, and higher education contribute to this adaptive thought process,...
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SynDIG4/Prrt1 Is Required for Excitatory Synapse Development and Plasticity Underlying Cognitive Function.

Lucas Matt1, Lyndsey M Kirk1, George Chenaux1

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|March 1, 2018
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Summary
This summary is machine-generated.

Synapse differentiation-induced gene 4 (SynDIG4) protein is crucial for maintaining excitatory synapse strength and cognitive function. Its absence impairs synaptic plasticity and learning in mice.

Keywords:
LTPNG5Prrt1SynDIG familySynDIG4auxiliary factorexcitatory synapseextrasynaptic AMPARshippocampus

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Area of Science:

  • Neuroscience
  • Molecular Biology
  • Synaptic Plasticity

Background:

  • Synaptic plasticity, particularly involving AMPA receptors (AMPARs), is vital for learning and memory.
  • Synapse differentiation-induced gene 1 (SynDIG1) regulates excitatory synapse strength and number.
  • The role of the related protein SynDIG4 (Prrt1) in synaptic function remains less understood.

Purpose of the Study:

  • To investigate the function of SynDIG4 in regulating AMPAR properties and synaptic plasticity.
  • To determine the impact of SynDIG4 deficiency on synaptic strength, long-term potentiation (LTP), and cognitive behavior.

Main Methods:

  • Utilized SynDIG4 knockout (KO) mouse models.
  • Employed immunocytochemistry and electrophysiology to assess synaptic properties.
  • Conducted cognitive assays to evaluate learning and memory deficits.

Main Results:

  • SynDIG4 KO mice exhibited weaker excitatory synapses and reduced mEPSC amplitude.
  • Adult SynDIG4 KO mice showed a complete loss of LTP and impaired cognitive function.
  • SynDIG4 was found to colocalize with the GluA1 AMPAR subunit at extrasynaptic sites.

Conclusions:

  • SynDIG4 modulates AMPAR gating in a subunit-dependent manner.
  • SynDIG4 is essential for maintaining extrasynaptic AMPAR pools critical for synapse development and function.
  • SynDIG4 plays a significant role in higher-order cognitive plasticity.