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A Model of Epileptogenesis in Rhinal Cortex-Hippocampus Organotypic Slice Cultures
Published on: March 18, 2021
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A systems-level analysis highlights microglial activation as a modifying factor in common epilepsies.
Andre Altmann1, Mina Ryten2, Martina Di Nunzio3
1Centre for Medical Image Computing, University College London, London, UK.
Neuropathology and Applied Neurobiology
|August 13, 2021
Summary
Activated microglia contribute to cortical thinning in epilepsy. Targeting these cells early in disease may prevent brain structure changes and memory deficits, offering new therapeutic avenues beyond seizure control.
Area of Science:
- Neuroscience
- Epilepsy Research
- Neuroimaging
Background:
- Cortical thinning in human epilepsies is common but its causes are unknown.
- Neuroimaging reveals distinct patterns of cortical thickness reduction with clinical impact.
Purpose of the Study:
- Investigate the mechanisms underlying cortical thinning in epilepsy.
- Identify the cellular and molecular drivers of epilepsy-associated brain structure changes.
Main Methods:
- Integrated neuroimaging data with human brain gene expression data.
- Employed cell-type deconvolution and differential expression analysis.
- Validated findings in post-mortem human epilepsy tissue and a mouse model.
Main Results:
- Regions with reduced cortical thickness showed increased microglia and endothelial cells.
- Activated microglial states were significantly enriched.
- Early depletion of activated microglia in mice prevented cortical thinning and memory deficits.
Conclusions:
- Activated microglia are strongly implicated in epilepsy-related cortical thinning.
- This suggests a novel therapeutic target for modifying epilepsy progression.
- Microglia-targeted interventions may offer benefits beyond seizure suppression.
