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The non-NMDA receptor antagonist NBQX does not affect rats performance in the object recognition task
Nikolaos Pitsikas1, Antonello E Rigamonti, Silvano G Cella
1Department of Medical Pharmacology, University of Milan, Milan, Italy. nikpit@yahoo.it
Pharmacological Research
|February 1, 2002
Summary
This study found that the AMPA receptor antagonist NBQX does not significantly impact working memory in rats at doses that do not cause motor impairment. These findings suggest AMPA receptors play a limited role in rat cognitive functions.
Area of Science:
- Neuroscience
- Cognitive Science
- Pharmacology
Background:
- AMPA receptors are implicated in neurodegenerative conditions like epilepsy and ischemia.
- The specific role of AMPA receptors in cognitive functions, particularly learning and memory, remains unclear.
Purpose of the Study:
- To investigate the effects of the AMPA receptor antagonist NBQX on learning and memory in a rat model.
- To determine if AMPA receptor activity is essential for working memory mechanisms.
Main Methods:
- Rats were administered varying doses of NBQX (3.5-30 mgkg(-1), i.p.).
- The object recognition task was employed to assess learning and memory.
- Motor activity and coordination were observed to identify dose-dependent side effects.
Main Results:
- Lower doses of NBQX (3.5, 7, 10 mgkg(-1)) did not affect performance in the object recognition task.
- Higher doses (20 and 30 mgkg(-1)) induced motor impairments (depression of motility and ataxia).
- All rats successfully acquired the object recognition task, regardless of NBQX dose, within the non-impairing range.
Conclusions:
- AMPA receptors do not appear to be critically involved in rat working memory.
- These findings support and extend previous research on the limited role of AMPA receptors in cognitive processes.
- NBQX can be used at specific doses to study cognitive functions without confounding motor effects.