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Development of diagnostics in the search for an explanation of aerotoxic syndrome
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- Author(s): Schopfer, Lawrence M.1 ; Furlong, Clement E.2; Lockridge, Oksana1
- Source:
Analytical Biochemistry. Sep2010, Vol. 404 Issue 1, p64-74. 11p.- Subject Terms:
- Source:
- Additional Information
- Abstract: Abstract: Aerotoxic syndrome is assumed to be caused by exposure to tricresyl phosphate, an additive in engine lubricants and hydraulic fluids that is activated to the toxic 2-(ortho-cresyl)-4H-1,3,2-benzodioxaphosphoran-2-one (CBDP). Currently, there is no laboratory evidence to support intoxication of airline crew members by CBDP. Our goal was to develop methods for testing in vivo exposure by identifying and characterizing biomarkers. Mass spectrometry was used to study the reaction of CBDP with human albumin, free tyrosine, and human butyrylcholinesterase. Human albumin made a covalent bond with CBDP, adding a mass of 170amu to Tyr411 to yield the o-cresyl phosphotyrosine derivative. Human butyrylcholinesterase made a covalent bond with CBDP on Ser198 to yield five adducts with added masses of 80, 108, 156, 170, and 186amu. The most abundant adduct had an added mass of 80amu from phosphate (HPO3), a surprising result given that no pesticide or nerve agent is known to yield phosphorylated serine with an added mass of 80amu. The next most abundant adduct had an added mass of 170amu to form o-cresyl phosphoserine. It is concluded that toxic gases or oil mists in cabin air may form adducts on plasma butyrylcholinesterase and albumin, detectable by mass spectrometry. [Copyright &y& Elsevier]
- Abstract: Copyright of Analytical Biochemistry is the property of Academic Press Inc. and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
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