Related Experiment Videos
Learning and memory impairment in albino rats after potassium ethylxanthogenate. Effects of nootropic agents
M Genkova-Papasova1, M Lazarova-Bakarova
1Institute of Physiology, Bulgarian Academy of Sciences.
Abstract:
The effects of the nootropic agents piracetam, aniracetam, meclofenoxate and fipexide on the cognitive functions impaired after potassium ethylxanthogenate, inhibitor of dopamine-beta-hydroxylase, were tested in experiments on albino rats. The changes in learning and memory were traced by the active conditioned avoidance method with negative reinforcement (shuttle-box) and the passive avoidance method (step-down). Potassium ethylxanthogenate, injected intraperitoneally in a dose of 100 mg/kg, markedly impaired learning and memory with both methods used. Piracetam (600 mg/kg), aniracetam (50 mg/kg), meclofenoxate (100 mg/kg) and fipexide (10 mg/kg), administered orally five days before and five days during shuttle-box training, as well as five days before step-down training, completely prevented the impairing effect of potassium ethylxanthogenate on the cognitive processes. The role of the noradrenergic neurotransmitter system and of other brain transmitter systems for memory disturbances caused by potassium ethylxanthogenate, as well as the protective effect of the nootropic drugs used, are discussed.
Insights
Nootropic drugs like piracetam effectively prevented memory impairment in rats caused by potassium ethylxanthogenate, an inhibitor of dopamine-beta-hydroxylase. These findings highlight the protective role of nootropics in cognitive function.
Area of Science:
- Neuroscience
- Pharmacology
- Cognitive Science
Background:
- Dopamine-beta-hydroxylase inhibition can impair cognitive functions.
- Nootropic agents are explored for their potential to enhance or protect cognitive processes.
Purpose of the Study:
- To investigate the effects of specific nootropic agents on cognitive deficits induced by potassium ethylxanthogenate.
- To evaluate the protective potential of piracetam, aniracetam, meclofenoxate, and fipexide against memory impairment.
Main Methods:
- Experiments were conducted on albino rats.
- Cognitive functions were assessed using active conditioned avoidance (shuttle-box) and passive avoidance (step-down) methods.
- Potassium ethylxanthogenate was administered to induce cognitive impairment, followed by administration of nootropic agents.
Main Results:
- Potassium ethylxanthogenate (100 mg/kg) significantly impaired learning and memory in rats.
- Oral administration of piracetam (600 mg/kg), aniracetam (50 mg/kg), meclofenoxate (100 mg/kg), and fipexide (10 mg/kg) completely prevented these impairments.
- The nootropic drugs demonstrated a protective effect against chemically induced cognitive deficits.
Conclusions:
- Nootropic agents piracetam, aniracetam, meclofenoxate, and fipexide can effectively counteract cognitive impairments induced by dopamine-beta-hydroxylase inhibition.
- The study suggests the involvement of the noradrenergic system and other neurotransmitter systems in memory disturbances and the protective effects of these nootropics.