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Saturation of postsynaptic receptors at central synapses?
1Section of Neurobiology, Physiology, and Behavior, Division of Biological Sciences, University of California, Davis, 95616, USA.
Current Opinion in Neurobiology
|June 1, 1996
Summary
The number of available receptors may limit postsynaptic responses, but this remains debated. Factors like synaptic anatomy and transmitter clearance influence receptor occupancy, varying between synapses.
Area of Science:
- Neuroscience
- Synaptic Physiology
Background:
- A key question in synaptic physiology concerns whether postsynaptic responses are limited by receptor availability.
- Current scientific consensus remains elusive despite extensive debate.
Purpose of the Study:
- To explore the factors influencing postsynaptic receptor occupancy.
- To address the ongoing debate regarding receptor availability limitations at synapses.
Main Methods:
- Analysis of existing evidence regarding synaptic cleft anatomy.
- Evaluation of the time course of neurotransmitter clearance.
- Comparative assessment of receptor occupancy across different synapses.
Main Results:
- Evidence suggests receptor occupancy is not fixed.
- Synaptic cleft anatomy significantly impacts receptor availability.
- Neurotransmitter clearance rates influence the degree of receptor occupancy.
Conclusions:
- Postsynaptic response limitations are likely multifactorial.
- Receptor occupancy is dynamic and synapse-specific.
- Further research is needed to fully elucidate receptor availability dynamics.