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Title: Characterization of Humanized Mouse Model of Organophosphate Poisoning and Detection of Countermeasures via MALDI-MSI

Journal Article · · International Journal of Molecular Sciences (Online)
 [1];  [2];  [3];  [1];  [1]; ORCiD logo [1];  [1]; ORCiD logo [2]
  1. Johns Hopkins Univ., Baltimore, MD (United States). School of Medicine
  2. US Army Medical Research Institute of Chemical Defense, Aberdeen Proving Ground, MD (United States)
  3. US Army Medical Research Institute of Chemical Defense, Aberdeen Proving Ground, MD (United States); Oak Ridge Institute for Science and Education (ORISE), Oak Ridge, TN (United States)

Organophosphoate (OP) chemicals are known to inhibit the enzyme acetylcholinesterase (AChE). Studying OP poisoning is difficult because common small animal research models have serum carboxylesterase, which contributes to animals’ resistance to OP poisoning. Historically, guinea pigs have been used for this research; however, a novel genetically modified mouse strain (KIKO) was developed with nonfunctional serum carboxylase (Es1 KO) and an altered acetylcholinesterase (AChE) gene, which expresses the amino acid sequence of the human form of the same protein (AChE KI). KIKO mice were injected with 1xLD50 of an OP nerve agent or vehicle control with or without atropine. After one to three minutes, animals were injected with 35 mg/kg of the currently fielded Reactivator countermeasure for OP poisoning. Postmortem brains were imaged on a Bruker RapifleX ToF/ToF instrument. Data confirmed the presence of increased acetylcholine in OP-exposed animals, regardless of treatment or atropine status. More interestingly, we detected a small amount of Reactivator within the brain of both exposed and unexposed animals; it is currently debated if reactivators can cross the blood–brain barrier. Further, we were able to simultaneously image acetylcholine, the primary affected neurotransmitter, as well as determine the location of both Reactivator and acetylcholine in the brain. This study, which utilized sensitive MALDI-MSI methods, characterized KIKO mice as a functional model for OP countermeasure development.

Research Organization:
Oak Ridge Institute for Science and Education (ORISE), Oak Ridge, TN (United States); Johns Hopkins Univ., Baltimore, MD (United States). School of Medicine
Sponsoring Organization:
USDOE Office of Science (SC); USDOD; NIH
Grant/Contract Number:
SC0014664
OSTI ID:
2471305
Journal Information:
International Journal of Molecular Sciences (Online), Journal Name: International Journal of Molecular Sciences (Online) Journal Issue: 11 Vol. 25; ISSN IJMCFK; ISSN 1422-0067
Publisher:
MDPICopyright Statement
Country of Publication:
United States
Language:
English

References (42)

Resurrection and Reactivation of Acetylcholinesterase and Butyrylcholinesterase journal February 2019
In Situ Imaging of N-Glycans by MALDI Imaging Mass Spectrometry of Fresh or Formalin-Fixed Paraffin-Embedded Tissue journal August 2018
A multimodal pipeline using NMR spectroscopy and MALDI‐TOF mass spectrometry imaging from the same tissue sample journal June 2022
High‐resolution MALDI‐FT‐ICR MS imaging for the analysis of metabolites from formalin‐fixed, paraffin‐embedded clinical tissue samples journal June 2015
Effect of pretreatment with CBDP on the toxicokinetics of soman stereoisomers in rats and guinea pigs journal December 1993
Reactivation kinetics of acetylcholinesterase from different species inhibited by highly toxic organophosphates journal September 2002
Organophosphorus compounds and oximes: a critical review journal June 2020
Phospho-NSAIDs Have Enhanced Efficacy in Mice Lacking Plasma Carboxylesterase: Implications for their Clinical Pharmacology journal November 2014
The effect of 2-(o-cresyl)-4H-1:3:2-benzodioxaphosphorin-2-oxide on tissue cholinesterase and carboxylesterase activities of the rat*1 journal October 1989
Cresylbenzodioxaphosphorin oxide pretreatment alters soman-induced toxicity and inhibition of tissue cholinesterase activity of the rat journal July 1989
Management of acute organophosphorus pesticide poisoning journal February 2008
MALDI imaging mass spectrometry — From bench to bedside journal July 2017
Preferential accumulation within tumors and in vivo imaging by functionalized luminescent dendrimer lanthanide complexes journal December 2011
Comparison of oxime reactivation and aging of nerve agent-inhibited monkey and human acetylcholinesterases journal September 2008
Comparison of human and guinea pig acetylcholinesterase sequences and rates of oxime-assisted reactivation journal September 2010
Differential sensitivity of plasma carboxylesterase-null mice to parathion, chlorpyrifos and chlorpyrifos oxon, but not to diazinon, dichlorvos, diisopropylfluorophosphate, cresyl saligenin phosphate, cyclosarin thiocholine, tabun thiocholine, and carbofuran journal February 2012
Organophosphate pesticide exposure and neurodegeneration journal January 2016
Mechanisms of organophosphate neurotoxicity journal June 2021
Current understanding of the application of pyridinium oximes as cholinesterase reactivators in treatment of organophosphate poisoning journal December 2006
Oxidative mechanisms for the biotransformation of 1-methyl-1,6-dihydropyridine-2-carbaldoxime to pralidoxime chloride journal December 2011
The value of novel oximes for treatment of poisoning by organophosphorus compounds journal August 2013
Analysis of inhibition, reactivation and aging kinetics of highly toxic organophosphorus compounds with human and pig acetylcholinesterase journal July 2006
Inhibition, reactivation and aging kinetics of highly toxic organophosphorus compounds: Pig versus minipig acetylcholinesterase journal February 2008
Comparison of the oxime-induced reactivation of rhesus monkey, swine and guinea pig erythrocyte acetylcholinesterase following inhibition by sarin or paraoxon, using a perfusion model for the real-time determination of membrane-bound acetylcholinesterase activity journal April 2009
Surface modification of pralidoxime chloride-loaded solid lipid nanoparticles for enhanced brain reactivation of organophosphorus-inhibited AChE: Pharmacokinetics in rat journal November 2020
Kinetic analysis of interactions of paraoxon and oximes with human, Rhesus monkey, swine, rabbit, rat and guinea pig acetylcholinesterase journal January 2011
Analysis of Lipids Using 2,4,6-Trihydroxyacetophenone as a Matrix for MALDI Mass Spectrometry journal April 2007
A Mimetic Tissue Model for the Quantification of Drug Distributions by MALDI Imaging Mass Spectrometry journal October 2013
MALDI-Mass Spectrometric Imaging Revealing Hypoxia-Driven Lipids and Proteins in a Breast Tumor Model journal June 2015
Molecular Imaging of Biological Samples:  Localization of Peptides and Proteins Using MALDI-TOF MS journal December 1997
Nanoparticle-Delivered 2-PAM for Rat Brain Protection against Paraoxon Central Toxicity journal May 2017
An In Vitro Comparative Study on the Reactivation of Nerve Agent-Inhibited Guinea Pig and Human Acetylcholinesterases by Oximes journal September 2007
Pneumatically Sprayed Gold Nanoparticles for Mass Spectrometry Imaging of Neurotransmitters journal August 2020
MALDI Imaging mass spectrometry: current frontiers and perspectives in pathology research and practice journal January 2015
Novel Brain-Penetrating Oxime Acetylcholinesterase Reactivators Attenuate Organophosphate-Induced Neuropathology in the Rat Hippocampus journal March 2019
Acute and long‐term consequences of exposure to organophosphate nerve agents in humans journal August 2018
Positron emission tomography of cerebral angiogenesis and TSPO expression in a mouse model of chronic hypoxia journal January 2017
MALDI imaging MS of phospholipids in the mouse lung journal April 2011
Therapy for acute nerve agent poisoning journal April 2019
The Tokyo subway sarin attack has long-term effects on survivors: A 10-year study started 5 years after the terrorist incident journal June 2020
Novel Genetically Modified Mouse Model to Assess Soman-Induced Toxicity and Medical Countermeasure Efficacy: Human Acetylcholinesterase Knock-in Serum Carboxylesterase Knockout Mice journal February 2021
Quantification and assessment of detection capability in imaging mass spectrometry using a revised mimetic tissue model journal June 2019