Related Experiment Video
Updated: Dec 25, 2025
09:07
Electroconvulsive Seizures in Rats and Fractionation of Their Hippocampi to Examine Seizure-induced Changes in Postsynaptic Density Proteins
Published on: August 15, 2017
12.5K
Sustained Ultrastructural Changes in Rat Hippocampal Formation After Repeated Electroconvulsive Seizures
Fenghua Chen1,2, Jibrin Danladi2, Gregers Wegener2,3,4
1Core Center for Molecular Morphology, Section for Stereology and Microscopy, Department of Clinical Medicine, Aarhus University, Aarhus, Denmark.
The International Journal of Neuropsychopharmacology
|March 28, 2020
Summary
Electroconvulsive therapy (ECT) rapidly enhances synaptic and nonneuronal plasticity. Repeated treatments induce sustained changes in plasticity, lasting at least three months, offering insights into depression treatment mechanisms.
Area of Science:
- Neuroscience
- Cell Biology
- Psychiatry
Background:
- Electroconvulsive therapy (ECT) is a proven depression treatment, but its mechanism is unclear.
- Prior research focused on early neuroplasticity after electroconvulsive seizures (ECS).
- This study investigates sustained neuroplasticity changes following repeated ECS in an animal model.
Purpose of the Study:
- To determine if synaptic and nonneuronal plasticity changes induced by ECS are sustained long-term.
- To examine vascular and mitochondrial plasticity alongside synaptic changes.
- To understand the long-lasting effects of repeated ECS treatments.
Main Methods:
- Used Flinders Sensitive and Resistant Line rats, a genetic model for depression.
- Administered daily ECS or sham treatments for 1 or 10 days.
- Quantified synapses, mitochondria, and microvessels using stereology 24 hours and 3 months post-treatment.
Main Results:
- A single ECS increased hippocampal volume, microvessel length, mitochondria, and synapse numbers.
- These observed changes were sustained in rats receiving 10 ECS treatments, analyzed 3 months later.
- Repeated ECS induced long-lasting efficacy in synaptic and nonneuronal plasticity.
Conclusions:
- Single ECS rapidly affects synaptic and nonneuronal plasticity.
- Repeated ECS leads to sustained changes in synaptic and nonneuronal plasticity for at least 3 months.
- Findings suggest ECT's therapeutic effects may stem from long-lasting plasticity modifications.
