An enhanced butyrylcholinesterase method to measure organophosphorus nerve agent exposure in humans

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• 作者：Brooke G. Pantazides (1)
  Caroline M. Watson (2)
  Melissa D. Carter (1)
  Brian S. Crow (1)
  Jonas W. Perez (3)
  Thomas A. Blake (1)
  Jerry D. Thomas (1)
  Rudolph C. Johnson (1)
  
• 关键词：Organophosphorus nerve agent ; Butyrylcholinesterase ; Cholinesterase inhibitors ; Protein adduct ; Immunomagnetic separation
• 刊名：Analytical and Bioanalytical Chemistry
• 出版年：2014
• 出版时间：August 2014
• 年：2014
• 卷：406
• 期：21
• 页码：5187-5194
• 全文大小：560 KB
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• 作者单位：Brooke G. Pantazides (1)
  Caroline M. Watson (2)
  Melissa D. Carter (1)
  Brian S. Crow (1)
  Jonas W. Perez (3)
  Thomas A. Blake (1)
  Jerry D. Thomas (1)
  Rudolph C. Johnson (1)
  
  1. Division of Laboratory Sciences, National Center for Environmental Health, Centers for Disease Control and Prevention, 4770 Buford Highway, NE, Atlanta, GA, 30341, USA
  2. Oak Ridge Institute for Science and Education Fellow at the Centers for Disease Control and Prevention, 4770 Buford Highway, NE, Atlanta, GA, 30341, USA
  3. Battelle, 2987 Clairmont Road, Atlanta, GA, 30329, USA
  
• ISSN：1618-2650

文摘

Organophosphorus nerve agent (OPNA) adducts to butyrylcholinesterase (BChE) can be used to confirm exposure in humans. A highly accurate method to detect G- and V-series OPNA adducts to BChE in 75?μL of filtered blood, serum, or plasma has been developed using immunomagnetic separation (IMS) coupled with liquid chromatography tandem mass spectrometry (LC-MS/MS). The reported IMS method captures >-8?% of the BChE in a specimen and corrects for matrix effects on peptide calibrators. The optimized method has been used to quantify baseline BChE levels (unadducted and OPNA-adducted) in a matched-set of serum, plasma, and whole blood (later processed in-house for plasma content) from 192 unexposed individuals to determine the interchangeability of the tested matrices. The results of these measurements demonstrate the ability to accurately measure BChE regardless of the format of the blood specimen received. Criteria for accepting or denying specimens were established through a series of sample stability and processing experiments. The results of these efforts are an optimized and rugged method that is transferrable to other laboratories and an increased understanding of the BChE biomarker in matrix.