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Updated: Feb 11, 2026
08:48
Synaptic Microcircuit Modeling with 3D Cocultures of Astrocytes and Neurons from Human Pluripotent Stem Cells
Published on: August 16, 2018
12.8K
Astrocytes optimize the synaptic transmission of information
Suhita Nadkarni1, Peter Jung, Herbert Levine
1Center of Theoretical Biological Physics, University of California San Diego, La Jolla, California, United States of America.
Plos Computational Biology
|June 3, 2008
Summary
Computational models show that limited neurotransmitter resources and spontaneous vesicle release restrict synaptic transmission enhancement. Astrocytes may optimize this process, especially in low-fidelity hippocampal synapses with few active zones.
Area of Science:
- Neuroscience
- Computational Biology
- Cellular Signaling
Background:
- Chemical synapses transmit information through neurotransmitter vesicle release.
- Synaptic transmission is influenced by resource availability and spontaneous release.
- Astrocytes are known to modulate synaptic function through signaling.
Purpose of the Study:
- To investigate the theoretical limits of synaptic transmission enhancement.
- To explore the role of astrocytes in optimizing synaptic function.
- To determine the impact of active zone number on synaptic tuning.
Main Methods:
- Utilized computational modeling to simulate synaptic transmission.
- Analyzed the interplay between neurotransmitter resource availability and spontaneous vesicle release.
- Compared model predictions with experimental data on astrocytic feedback in hippocampal synapses.
Main Results:
- Limited neurotransmitter resources and spontaneous release cap synaptic enhancement.
- An optimal tuning of synaptic transmission exists, dependent on the number of active zones.
- Predicted optimal values align with experimentally observed astrocytic modulation in low-fidelity synapses.
Conclusions:
- Astrocytes play a crucial role in optimizing synaptic information transmission.
- The number of active zones is a key factor in determining optimal synaptic tuning.
- Understanding these mechanisms is vital for comprehending neural information processing.
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