148
Views
12
CrossRef citations to date
0
Altmetric
Research Article

Development of a model for nerve agent inhalation in conscious rats

, , , , &
Pages 537-547 | Received 21 Feb 2013, Accepted 07 Apr 2013, Published online: 23 May 2013
 

Abstract

This study characterizes the development of a head-out inhalation exposure system for assessing respiratory toxicity of vaporized chemical agents in untreated, non-anesthetized rats. The organophosphate diisopropyl fluorophosphate (DFP) induces classical cholinergic toxicity following inhalation exposure and was utilized to validate the effectiveness of this newly designed inhalation exposure system. A saturator cell apparatus was used to generate DFP vapor at 9750, 10 950, 12 200, 14 625 and 19 500 mg × min/m3 which was carried by filtered nitrogen into a glass mixing tube, where it combined with ambient air before being introduced to the custom-made glass exposure chamber. Male Sprague-Dawley rats (250–300 g) were restrained in individual head-out plethysmography chambers, which acquired respiratory parameters before, during and after agent exposure. All animals were acclimated to the exposure system prior to exposure to reduce novel environment-induced stress. The LCt50, as determined by probit analysis, was 12 014 mg × min/m3. Weight loss in exposed animals was dose-dependent and ranged from 8 to 28% of their body weight 24 h after exposure. Increased salivation, lacrimation, urination, defecation (SLUD) and mild muscular fasciculation were observed in all DFP-exposed animals during and immediately following exposure. In all exposed animals, DFP vapor produced significant inhibition of acetylcholinesterase (AChE) activity in cardiac blood, bronchoalveolar lavage fluid (BALF), whole brain and lung tissue as well as alterations in tidal volume and minute volume. These studies have provided valuable information leading to the initiation of studies evaluating inhalational toxicity and treatments following exposure to the more lethal and potent chemical warfare nerve agents.

Log in via your institution

Log in to Taylor & Francis Online

PDF download + Online access

  • 48 hours access to article PDF & online version
  • Article PDF can be downloaded
  • Article PDF can be printed
USD 65.00 Add to cart

Issue Purchase

  • 30 days online access to complete issue
  • Article PDFs can be downloaded
  • Article PDFs can be printed
USD 704.00 Add to cart

* Local tax will be added as applicable

Related Research

People also read lists articles that other readers of this article have read.

Recommended articles lists articles that we recommend and is powered by our AI driven recommendation engine.

Cited by lists all citing articles based on Crossref citations.
Articles with the Crossref icon will open in a new tab.