Convulsant properties of cyclotrimethylenetrinitramine (RDX): spontaneous audiogenic, and amygdaloid kindled seizure activity.

Published

Journal Article

Dose-effect and time course relationships were determined for the effects of the explosive cyclotrimethylenetrinitramine (RDX) on seizure susceptibility. Male Long Evans rats treated with 0-60 mg/kg RDX po were monitored for spontaneous seizures during an 8-hr interval between dosing and audiogenic (AG) seizure testing. Blood samples for analyzing plasma RDX concentrations were obtained immediately thereafter. Spontaneous and AG seizures were observed at dosages as low as 10-12.5 mg/kg, with significant seizure incidence induced by dosages of 25.0 mg/kg (5.34 micrograms RDX/ml plasma) and 50.0 mg/kg (8.28 micrograms RDX/ml plasma), respectively. Spontaneous seizure incidence peaked at 2 hr for all RDX treatment groups, then decreased (12.5 and 25.0 mg/kg) or remained elevated (50.0 mg/kg) for the remaining 6 hr. In contrast, AG seizures (37.5 mg/kg) could be elicited only at 8 and 16 hr, despite significant elevation of plasma RDX concentrations at 2 and 4 hr. Because limbic system involvement was suggested by spontaneous seizure characteristics, the rate of amygdaloid kindling was measured following daily treatment with 6.0 mg/kg. This dosage significantly accelerated kindling development without inducing spontaneous seizures or producing an accumulation of RDX in plasma. These data provide preliminary evidence that limbic structures may participate in RDX-induced seizure susceptibility.

Full Text

Cited Authors

  • Burdette, LJ; Cook, LL; Dyer, RS

Published Date

  • March 1988

Published In

Volume / Issue

  • 92 / 3

Start / End Page

  • 436 - 444

PubMed ID

  • 3353989

Pubmed Central ID

  • 3353989

Electronic International Standard Serial Number (EISSN)

  • 1096-0333

International Standard Serial Number (ISSN)

  • 0041-008X

Digital Object Identifier (DOI)

  • 10.1016/0041-008x(88)90183-4

Language

  • eng