A rat model of organophosphate-induced status epilepticus and the beneficial effects of EP2 receptor inhibition

Neurobiol Dis. 2020 Jan:133:104399. doi: 10.1016/j.nbd.2019.02.010. Epub 2019 Feb 25.

Abstract

This review describes an adult rat model of status epilepticus (SE) induced by diisopropyl fluorophosphate (DFP), and the beneficial outcomes of transient inhibition of the prostaglandin-E2 receptor EP2 with a small molecule antagonist, delayed by 2-4 h after SE onset. Administration of six doses of the selective EP2 antagonist TG6-10-1 over a 2-3 day period accelerates functional recovery, attenuates hippocampal neurodegeneration, neuroinflammation, gliosis and blood-brain barrier leakage, and prevents long-term cognitive deficits without blocking SE itself or altering acute seizure characteristics. This work has provided important information regarding organophosphate-induced seizure related pathologies in adults and revealed the effectiveness of delayed EP2 inhibition to combat these pathologies.

Keywords: Acetylcholinesterase; Albumin; Cyclooxygenase-2; Diisopropyl fluorophosphate; EP2; Neurodegeneration; Neuroinflammation; Organophosphorus; Status epilepticus.

Publication types

  • Research Support, N.I.H., Extramural
  • Review

MeSH terms

  • Animals
  • Cholinesterase Inhibitors / toxicity
  • Disease Models, Animal
  • Indoles / pharmacology*
  • Isoflurophate / toxicity
  • Organophosphate Poisoning*
  • Rats
  • Receptors, Prostaglandin E, EP2 Subtype / antagonists & inhibitors*
  • Status Epilepticus / chemically induced*

Substances

  • Cholinesterase Inhibitors
  • Indoles
  • Receptors, Prostaglandin E, EP2 Subtype
  • TG6-10-1
  • Isoflurophate