Related Experiment Videos
Brain GABAB binding sites in depressed suicide victims
J A Cross1, S C Cheetham, M R Crompton
1Department of Pharmacology & Clinical Pharmacology, St. George's Hospital Medical School, London.
Psychiatry Research
|November 1, 1988
Summary
This study found no significant differences in gamma-aminobutyric acid, type B (GABAB) binding sites in the brains of depressed suicide victims compared to controls. GABAB receptor binding appears unaltered in depression-related suicides.
Area of Science:
- Neuroscience
- Psychiatry
- Biochemistry
Background:
- Gamma-aminobutyric acid, type B (GABAB) receptors are implicated in mood regulation.
- Previous research suggests potential alterations in GABAB binding in psychiatric disorders.
Purpose of the Study:
- To investigate GABAB binding sites in post-mortem brain samples from depressed suicide victims.
- To compare GABAB binding in specific brain regions between depressed suicides and matched controls.
Main Methods:
- Post-mortem brain samples (frontal cortex, temporal cortex, hippocampus) were analyzed.
- GABAB binding sites were measured using radioligand binding assays.
- Retrospective psychiatric diagnoses were used for subject selection.
Main Results:
- No significant differences in the number or affinity of GABAB binding sites were found in the frontal or temporal cortex.
- GABAB binding in the hippocampus was also not significantly different between groups.
- A higher dissociation constant (Kd) for GABAB binding was observed in the temporal cortex of drug-free suicides.
Conclusions:
- GABAB binding sites in the brain are generally unaltered in depressed suicide victims.
- While overall binding is unchanged, subtle differences in receptor affinity may exist in specific regions.
- Age showed a negative correlation with GABAB binding site density in the temporal cortex.