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Development of a competitive immunoassay for the determination of N-(2-hydroxyethyl)valine adducts in human haemoglobin and its application in biological monitoring.

Authors
  • Ball, Lathan
  • Jones, Alan
  • Boogaard, Peter
  • Will, Wolfgang
  • Aston, Paul
Type
Published Article
Journal
Biomarkers : biochemical indicators of exposure, response, and susceptibility to chemicals
Publication Date
Jan 01, 2004
Volume
9
Issue
6
Pages
407–417
Identifiers
PMID: 15849062
Source
Medline
License
Unknown

Abstract

Ethylene oxide (EO) is an important industrial compound and a directly acting mutagen. Human exposure to it can be monitored by the determination of haemoglobin (Hb) adducts. An immunoassay that quantifies the N-terminal adduct N-(2-hydroxyethyl)valine in whole blood was developed, and its potential usefulness as a tool for biologically monitoring occupational exposure demonstrated. Analytical reliability was confirmed in a comparative study with gas chromatography-mass spectrometry (range 0.040-589 nmol g(-1) Hb, correlation coefficient 0.98, n=10). The assay was configured as a competitive enzyme-linked immunosorbent assay to facilitate the rapid throughput of samples. The assay uses a whole blood matrix and has a working range of 10-10000 pmol N-(2-hydroxyethyl)valine g(-1) hB. The assay does not appear to be affected by structurally similar metabolites and has been used to determine adducts in human blood samples. The first results from potentially exposed workers indicate the assay might be a powerful tool for the routine occupational biomonitoring of EO exposure.

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