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Subtypes of NMDA receptors
1Department of Pharmacology, University of Glasgow, Scotland.
General Pharmacology
|July 1, 1993
Summary
Research shows distinct N-methyl-D-aspartate (NMDA) receptor populations exist. These receptors differ in binding preferences and modulation, suggesting at least two pharmacologically unique sites, including a distinct cerebellar receptor.
Area of Science:
- Neuroscience
- Molecular Biology
- Pharmacology
Background:
- Electrophysiological studies suggest multiple N-methyl-D-aspartate (NMDA) receptor populations.
- Evidence indicates these receptor populations may differ in their response to agonists like quinolinic acid.
Purpose of the Study:
- To investigate the pharmacological distinctions between various NMDA receptor subtypes.
- To explore the molecular and functional diversity of NMDA receptors in different brain regions.
Main Methods:
- Electrophysiology to assess receptor function.
- Binding studies using agonists and antagonists.
- Molecular isolation and sequencing of NMDA receptor subunits.
Main Results:
- Binding data reveals differences in agonist/antagonist preferences and modulation by dizocilpine, cations, and polyamines across striatal, thalamic, and cerebellar NMDA receptors.
- Isolation of distinct NMDA receptor molecular species supports pharmacological subdivision.
- The cerebellar NMDA receptor exhibits unique binding characteristics compared to other brain regions.
Conclusions:
- At least two pharmacologically distinct NMDA receptor sites exist.
- The NMDA receptor in the cerebellum is unique within the brain.
- Molecular and functional heterogeneity of NMDA receptors is confirmed.