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Hallez F, Combès A, Desoubries C, Bossée A, Pichon V. Analysis of long-lived sulfur mustard-human hemoglobin adducts in blood samples by red blood cells lysis and on-line coupling of digestion on an immobilized-trypsin reactor with liquid chromatography-tandem mass spectrometry. J Chromatogr A 2022; 1665:462830. [DOI: 10.1016/j.chroma.2022.462830] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2021] [Accepted: 01/13/2022] [Indexed: 12/01/2022]
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Hallez F, Combès A, Desoubries C, Bossée A, Pichon V. Development of an immobilized-trypsin reactor coupled to liquid chromatography and tandem mass spectrometry for the analysis of human hemoglobin adducts with sulfur mustard. J Chromatogr B Analyt Technol Biomed Life Sci 2021; 1186:123031. [PMID: 34781109 DOI: 10.1016/j.jchromb.2021.123031] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/09/2021] [Revised: 11/03/2021] [Accepted: 11/07/2021] [Indexed: 11/24/2022]
Abstract
Sulfur mustard reacts with blood proteins, such as hemoglobin, to form stable adducts that can be used as long-lived biomarkers of exposure. These adducts can be analyzed by liquid chromatography coupled to tandem mass-spectrometry (LC-MS/MS) after an enzymatic digestion step. The objective of this study was to develop trypsin-based immobilized enzyme reactors (IMERs) in order to obtain a faster digestion of hemoglobin than the conventional in-solution digestion. Trypsin IMERs were synthetized by grafting the enzyme on a CNBr-Sepharose gel and the influence of several parameters on the digestion yields, such as the transfer volume between the injection loop and the IMER, the temperature and the digestion time was studied. The repeatability of the digestion on three laboratory-made IMERs was demonstrated for pure hemoglobin and hemoglobin previously exposed to different concentrations of sulfur mustard (RSD inferior to 13% and 21% respectively) and was better than that obtained for in-solution digestions (RSD inferior to 28% and up to 53% respectively). A preferential adduction of sulfur mustard on the histidine residues of hemoglobin was confirmed, for both in-solution and IMER digestion results. On a quantitative point of view, the performances of in-solution and IMER digestions were similar, with the theoretical possibility to detect peptides resulting from the in vitro incubation of hemoglobin in pure water with sulfur mustard at 7.5 ng⋅mL-1. However, digestion on IMER proved to be more repeatable and 32 times faster than in-solution digestion, and a given IMER could be reused at least 60 times.
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Affiliation(s)
- Florine Hallez
- Department of Analytical, Bioanalytical Sciences and Miniaturization (LSABM), Chemistry, Biology and Innovation (CBI), ESPCI Paris, PSL University, CNRS, 10 rue Vauquelin, 75005 Paris, France
| | - Audrey Combès
- Department of Analytical, Bioanalytical Sciences and Miniaturization (LSABM), Chemistry, Biology and Innovation (CBI), ESPCI Paris, PSL University, CNRS, 10 rue Vauquelin, 75005 Paris, France
| | - Charlotte Desoubries
- DGA, CBRN Defence, Analytical Chemistry Department, 5 rue Lavoisier, 91710 Vert-le-Petit, France
| | - Anne Bossée
- DGA, CBRN Defence, Analytical Chemistry Department, 5 rue Lavoisier, 91710 Vert-le-Petit, France
| | - Valérie Pichon
- Department of Analytical, Bioanalytical Sciences and Miniaturization (LSABM), Chemistry, Biology and Innovation (CBI), ESPCI Paris, PSL University, CNRS, 10 rue Vauquelin, 75005 Paris, France; Sorbonne Université, Campus UPMC, 4 Place Jussieu, 75005 Paris, France.
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Development of a liquid chromatography-tandem mass spectrometry (LC-MS/MS) method for the analysis of tryptic digest of human hemoglobin exposed to sulfur mustard. J Chromatogr B Analyt Technol Biomed Life Sci 2021; 1163:122518. [DOI: 10.1016/j.jchromb.2020.122518] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/22/2020] [Revised: 12/18/2020] [Accepted: 12/21/2020] [Indexed: 11/18/2022]
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