Related Experiment Videos
Effect of AMPA receptor modulators on hippocampal and cortical function
M D Black1, J Wotanis, D E Schilp
1CNS Research, Aventis Pharmaceuticals, Bridgewater, NJ 08807, USA. marl.black@aventis.com
European Journal of Pharmacology
|April 20, 2000
Summary
Positive allosteric modulators of alpha-amino-3-hydroxy-5-methyl-4-isoxazole proprionic acid (AMPA) receptors show varied functionality. Their effects differ between brain regions and depend on whether responses are endogenous or exogenous.
Area of Science:
- Neuroscience
- Pharmacology
Background:
- Alpha-amino-3-hydroxy-5-methyl-4-isoxazole proprionic acid (AMPA) receptors are crucial for glutamatergic neurotransmission.
- Modulators of AMPA receptors are investigated for cognitive enhancement and treating neurological disorders.
Purpose of the Study:
- To compare the functionality of positive allosteric modulators (PAMs) of AMPA receptors in the hippocampus and medial prefrontal cortex.
- To investigate regional differences in AMPA receptor PAM activity.
Main Methods:
- Electrically stimulated excitatory postsynaptic potentials (EPSPs) were used in hippocampal slices.
- Grease gap electrophysiology was employed to assess AMPA-induced depolarization.
- The effects of CX516, aniracetam, 1-BCP, and cyclothiazide were evaluated.
Main Results:
- In the hippocampus, CX516, aniracetam, and 1-BCP augmented electrically stimulated EPSPs, while cyclothiazide did not.
- Simultaneous application with AMPA showed regional differences: aniracetam, 1-BCP, and CX516 augmented frontal cortex responses, whereas only aniracetam and cyclothiazide augmented hippocampal responses.
- Modulator effects varied based on whether AMPA responses were endogenously generated or exogenously induced.
Conclusions:
- AMPA receptor PAMs exhibit distinct regional functionalities in the hippocampus and medial prefrontal cortex.
- The mode of application and the origin of AMPA receptor activation influence the efficacy of these modulators.