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Electroconvulsive seizure treatment increases cell proliferation in rat frontal cortex
Torsten M Madsen1, Damaris D Yeh, Gerald W Valentine
1Laboratory of Molecular Psychiatry, Departments of Psychiatry and Pharmacology, Yale University School of Medicine, New Haven, CT, USA.
Summary
Electroconvulsive seizure (ECS) treatment boosts cell proliferation in the frontal cortex. These new cells are endothelial or oligodendrocyte cells, not neurons, potentially counteracting volume loss in depression.
Area of Science:
- Neuroscience
- Cell Biology
- Psychiatry
Background:
- Antidepressant treatments, including electroconvulsive seizure (ECS), are known to increase neurogenesis in the adult hippocampus.
- Neuronal proliferation is typically confined to the hippocampus and subventricular zone.
- Mood disorders may involve brain regions beyond the hippocampus, such as the frontal cortex.
Purpose of the Study:
- To investigate the effect of repeated ECS on cell proliferation in the frontal cortex.
- To determine the phenotype of newly divided cells in the frontal cortex after ECS treatment.
Main Methods:
- Repeated administration of electroconvulsive seizure (ECS) to subjects.
- Labeling of newly divided cells using a cell division marker.
- Analysis of cell phenotype 4 weeks post-labeling in the frontal cortex.
Main Results:
- Repeated ECS administration significantly increased the number of newly divided cells in the frontal cortex.
- The newly generated cells in the frontal cortex expressed markers of endothelial cells or oligodendrocytes.
- No newly generated neurons were identified in the frontal cortex following ECS treatment.
Conclusions:
- ECS treatment promotes the proliferation of non-neuronal cells, specifically endothelial and oligodendrocyte precursors, in the frontal cortex.
- This glial cell proliferation may help to reverse the reported glial loss and reduced volume in the frontal cortex associated with depression.
- Findings suggest potential mechanisms for ECS in treating mood disorders by influencing frontal cortex glial populations.