Glutathione conjugates of the mercapturic acid pathway and guanine adduct as biomarkers of exposure to CEES, a sulfur mustard analog - Archive ouverte HAL Accéder directement au contenu
Article Dans Une Revue Analytical and Bioanalytical Chemistry Année : 2021

Glutathione conjugates of the mercapturic acid pathway and guanine adduct as biomarkers of exposure to CEES, a sulfur mustard analog

Fanny Caffin
  • Fonction : Auteur

Résumé

Sulfur mustard (SM), a chemical warfare agent, is a strong alkylating compound that readily reacts with numerous biomolecules. The goal of the present work was to define and validate new biomarkers of exposure to SM that could be easily accessible in urine or plasma. Because investigations using SM are prohibited by the Organization for the Prohibition of Chemical Weapons, we worked with 2-chloroethyl ethyl sulfide (CEES), a monofunctional analog of SM. We developed an ultra-high-pressure liquid chromatography - tandem mass spectrometry approach (UHPLC-MS/MS) to the conjugate of CEES to glutathione and two of its metabolites, the cysteine and the N-acetyl-cysteine conjugates. The N7-guanine adduct of CEES (N7Gua-CEES) was also targeted. After synthesizing the specific biomarkers, a solid phase extraction protocol and a UHPLC-MS/MS method with isotopic dilution were optimized. We were able to quantify N7Gua-CEES in the DNA of HaCaT keratinocytes and of explants of human skin exposed to CEES. N7Gua-CEES was also detected in the culture medium of these two models, together with the glutathione and the cysteine conjugates. In contrast, the N-acetyl-cysteine conjugate was not detected. The method was then applied to plasma from mice cutaneously exposed to CEES. All four markers could be detected. Our present results thus validate both the analytical technique and the biological relevance of new, easily quantifiable biomarkers of exposure to CEES. Because CEES behaves very similarly to SM, the results are promising for application to this toxic of interest.
Fichier principal
Vignette du fichier
2020 Roser et Anal Bioanal Chem final.pdf (1.6 Mo) Télécharger le fichier
Origine : Fichiers produits par l'(les) auteur(s)

Dates et versions

hal-03103848 , version 1 (08-01-2021)

Identifiants

Citer

Marie Roser, David Béal, Camille Eldin, Leslie Gudimard, Fanny Caffin, et al.. Glutathione conjugates of the mercapturic acid pathway and guanine adduct as biomarkers of exposure to CEES, a sulfur mustard analog. Analytical and Bioanalytical Chemistry, 2021, 413, pp.1337-1351. ⟨10.1007/s00216-020-03096-4⟩. ⟨hal-03103848⟩
68 Consultations
48 Téléchargements

Altmetric

Partager

Gmail Facebook X LinkedIn More