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Mesolimbic dopamine receptor increases two weeks following hippocampal kindling
J G Csernansky1, S Kerr, R Pruthi
1Department of Psychiatry and Behavioral Sciences, Stanford University School of Medicine, CA 94305.
Brain Research
|May 24, 1988
Summary
Kindled seizures in rats led to a significant increase in dopamine D2 receptors in the nucleus accumbens. This study explores the long-term neurochemical changes following kindling.
Area of Science:
- Neuroscience
- Epilepsy Research
- Neuropharmacology
Background:
- Epilepsy, a neurological disorder, is characterized by recurrent seizures.
- Seizure kindling is an experimental model used to study epilepsy development.
- Long-term neurochemical alterations following kindling are not fully understood.
Purpose of the Study:
- To investigate the long-term changes in dopamine D2 receptor density after kindled seizures in a rat model.
- To identify specific brain regions affected by kindling-induced neurochemical modifications.
Main Methods:
- Kindled seizures were induced in rats via electrical stimulation of the hippocampus (CA1 region).
- Dopamine D2 receptor densities were measured in specific brain regions (amygdala, nucleus accumbens, caudate nucleus) two weeks post-kindling.
- Quantitative assays were used to determine receptor density.
Main Results:
- A significant 107% increase in dopamine (DA) D2 receptor density was observed in the ipsilateral nucleus accumbens.
- No significant changes were reported in other assayed brain regions (amygdala, caudate nucleus).
Conclusions:
- Kindled seizures induce lasting neurochemical changes, specifically an upregulation of dopamine D2 receptors in the nucleus accumbens.
- These findings contribute to understanding the neurobiological consequences of chronic seizure activity.
- The study highlights the nucleus accumbens as a key area affected by kindling.