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Benzodiazepines induce sequelae in immature mice with inflammation-induced status epilepticus

Keisuke Nakajima1, Shinobu Hirai2, Tomohiro Morio3

  • 1Department of Brain Development and Neural Regeneration, Neural Development Project, Tokyo Metropolitan Institute of Medical Science, Japan; Department of Pediatrics and Developmental Biology, Tokyo Medical and Dental University, Japan.

Epilepsy & Behavior : E&B
|October 7, 2015
PubMed

Insights

Benzodiazepines (BZPs) may worsen outcomes in pediatric status epilepticus (SE) by inducing hyperactivity and affecting GABA neurons. Rethinking BZP therapy for SE is crucial, exploring alternative treatments for better neurological sequelae management.

Area of Science:

  • Neuroscience
  • Pharmacology
  • Pediatric Neurology

Background:

  • Benzodiazepines (BZPs) are standard treatments for status epilepticus (SE) in children.
  • Increased incidence of neurological sequelae has been observed since BZP clinical availability.
  • The direct cause-effect relationship between BZPs and SE sequelae remains poorly understood.

Purpose of the Study:

  • To investigate the impact of BZPs on an inflammation-induced SE (iSE) animal model.
  • To evaluate the role of BZPs in the development of neurological sequelae following iSE.

Main Methods:

  • An iSE model was established in C57BL/6J mice using poly(I:C) and pilocarpine hydrochloride.
  • Midazolam (MDL), a GABA-A receptor agonist, was administered to inhibit seizures in the iSE model.
  • Behavioral and immunohistochemical analyses were performed to assess chronic-phase sequelae.

Main Results:

  • Midazolam treatment in the iSE model induced hyperactivity and rescued contextual fear memory deficits.
  • Poly(I:C) plus pilocarpine hydrochloride decreased parvalbumin-positive GABA neurons, which MDL rescued.
  • Apoptosis markers (ssDNA) increased in the iSE model and were not rescued by MDL.

Conclusions:

  • BZP treatment for SE may induce adverse effects, including hyperactivity, in an inflammation-induced model.
  • While BZPs can modulate specific neuronal populations and memory, they do not prevent apoptosis.
  • These findings suggest a need to reconsider BZP-based therapies for SE and explore alternative approaches.
Abstract

Keywords:
BenzodiazepineChildrenGABA-A receptorInflammationStatus epilepticus

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