Related Experiment Videos
Glutamatergic involvement in psychomotor stimulant action
1Department of Pharmacology and Toxicology, University of Mississippi Medical Center, Jackson 39216-4505, USA.
Summary
Glutamate receptor antagonists can block the harmful effects of psychomotor stimulants like cocaine and amphetamines. This research highlights glutamate receptor blockade as a potential therapy for stimulant toxicity.
Area of Science:
- Neuroscience
- Pharmacology
Background:
- Psychomotor stimulants, including cocaine and amphetamines, interact with the mammalian nervous system.
- Evidence suggests a role for the excitatory neurotransmitter glutamate and its receptors in the actions of these stimulants.
Purpose of the Study:
- To investigate the role of glutamate receptors in mediating the toxic effects of psychomotor stimulants.
- To explore the therapeutic potential of glutamate receptor antagonists in managing stimulant toxicity.
Main Methods:
- Examined the effects of psychomotor stimulants on various physiological and behavioral responses in mammalian systems.
- Utilized receptor antagonists for N-methyl-D-aspartate (NMDA) and AMPA/kainate glutamate receptor subtypes.
Main Results:
- Blockade of NMDA and AMPA/kainate glutamate receptors successfully inhibited acute lethal, convulsive, circulatory, thermoregulatory, locomotor, and stereotypical responses induced by stimulants.
- Glutamate receptor antagonists also interfered with the development of behavioral sensitization and prevented monoaminergic neurotoxicities.
- Psychostimulant administration was linked to alterations in glutamatergic neurobiology, including increased extracellular glutamate and neurodegeneration.
Conclusions:
- Glutamate receptor antagonism is effective in mitigating a range of psychomotor stimulant-induced toxicities.
- Targeting glutamate receptors presents a promising therapeutic strategy for managing psychomotor stimulant overdose and toxicity.