Epilepsy.

Area of Science:

• Neurology
• Neuroimmunology
• Biochemistry

Background:

• Epilepsy is a common neurological disorder affecting 0.5-1% of the global population.
• Diagnostic workup for epilepsy includes cerebrospinal fluid (CSF) analysis to rule out urgent conditions.
• CSF investigations assess cell counts, glucose, lactate, albumin, and immunoglobulins.

Purpose of the Study:

• To review findings from recent studies on CSF abnormalities following epileptic seizures.
• To understand the transient and persistent changes in CSF parameters.
• To explore the role of CSF biomarkers in epileptogenesis and potential immunotherapy targets.

Main Methods:

• Analysis of existing literature on CSF investigations in epilepsy patients.
• Review of parameters including liquor pleocytosis, blood-CSF barrier function, lactate, tau protein, and immunoglobulin synthesis.
• Correlation of CSF findings with seizure characteristics and duration.

Main Results:

• Transient liquor pleocytosis is rare and typically occurs within 72 hours post-seizure.
• Blood-CSF barrier disruption is common after seizures and implicated in epileptogenesis.
• Elevated lactate and tau protein are observed post-seizure, with lactate being transient (≤72 hours) and tau persisting (9-14 days).
• Increased albumin quotients correlate with blood-CSF barrier disruption and persist longer than lactate.

Conclusions:

• CSF analysis reveals transient and persistent biomarkers after epileptic seizures.
• Blood-CSF barrier disruption and elevated tau protein may play roles in epileptogenesis.
• Intrathecal immunoglobulin synthesis is noted in focal cryptogenic epilepsy, suggesting potential for immunotherapy.
• Further clinical and experimental trials are needed to identify targets for immunotherapy in epilepsy.