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Simultaneous quantification of soman and VX adducts to butyrylcholinesterase, their aged methylphosphonic acid adduct and butyrylcholinesterase in plasma using an off-column procainamide-gel separation method combined with UHPLC–MS/MS
- Source :
- Journal of Chromatography B. :57-65
- Publication Year :
- 2016
- Publisher :
- Elsevier BV, 2016.
-
Abstract
- This work describes a novel and sensitive non-isotope dilution method for simultaneous quantification of organophosphorus nerve agents (OPNAs) soman (GD) and VX adducts to butyrylcholinesterase (BChE), their aged methylphosphonic acid (MeP) adduct and unadducted BChE in plasma exposed to OPNA. OPNA-BChE adducts were isolated with an off-column procainamide-gel separation (PGS) from plasma, and then digested with pepsin into specific adducted FGES*AGAAS nonapeptide (NP) biomarkers. The resulting NPs were detected by UHPLC-MS/MS MRM. The off-column PGS method can capture over 90% of BChE, MeP-BChE, VX-BChE and GD-BChE from their respective plasma materials. One newly designed and easily synthesized phosphorylated BChE nonapeptide with one Gly-to-Ala mutation was successfully reported to serve as internal standard instead of traditional isotopically labeled BChE nonapeptide. The linear range of calibration curves were from 1.00-200ngmL-1 for VX-NP, 2.00-200ngmL-1 for GD-NP and MeP-NP (R2≥0.995), and 3.00-200ngmL-1 for BChE NP (R2≥0.990). The inter-day precision had relative standard deviation (%RSD) of
- Subjects :
- 0301 basic medicine
Soman
Clinical Biochemistry
Procainamide
Immunomagnetic separation
01 natural sciences
Biochemistry
Analytical Chemistry
Adduct
03 medical and health sciences
chemistry.chemical_compound
Organophosphorus Compounds
Limit of Detection
Tandem Mass Spectrometry
medicine
Humans
Sample preparation
Chemical Warfare Agents
Methylphosphonic acid
Chromatography, High Pressure Liquid
Butyrylcholinesterase
Nerve agent
Detection limit
Chromatography
010401 analytical chemistry
Organothiophosphorus Compounds
Equipment Design
Cell Biology
General Medicine
0104 chemical sciences
030104 developmental biology
chemistry
Cholinesterase Inhibitors
Gels
medicine.drug
Subjects
Details
- ISSN :
- 15700232
- Database :
- OpenAIRE
- Journal :
- Journal of Chromatography B
- Accession number :
- edsair.doi.dedup.....cace5262be72fdb48f8631223755bf78