Document Detail

Biological markers of exposure to SO2: S-sulfonates in nasal lavage.
MedLine Citation:
PMID:  8173339     Owner:  NLM     Status:  MEDLINE    
S-sulfonate levels were measured in the nasal lavage (NAL) fluid of humans exposed to sulfur dioxide as a potential biological marker of exposure. These levels were determined by treating NAL fluid protein with cyanide to cleave the S-S linkage and release the sulfite. The cyanolytically released sulfite was measured by ion chromatography. In two experiments, humans were exposed to air or 1 ppm SO2 for 10 minute, and to air or 7 ppm SO2 for 20 minutes and lavaged immediately after exposure. Releasable sulfite levels in NAL fluid were 1.06 +/- 0.24 and 2.61 +/- 0.55 micrograms SO=3/mg protein, respectively (mean +/- SE, n = 5), for the first experiment, and 1.16 +/- 0.37 and 4.91 +/- 0.76 micrograms SO=3/mg protein, respectively (mean +/- SE, n = 8), for the second. The subjects in the former study were persons with asthma. In both experiments, S-sulfonate levels were statistically elevated in the exposed group compared with the control groups (p < 0.05, paired t-test). The same individuals in the second experiment received five additional 20-minute exposures to 7 ppm SO2 every other day, for a total of six exposures. NAL fluid taken at the conclusion of the final exposure had releasable sulfite levels of 4.99 +/- 1.36 micrograms SO=3/mg protein; these levels were statistically elevated relative to controls but were not elevated relative to the 1-day exposure (mean +/- SE, n = 8). The lack of accumulation of S-sulfonates after 6 days of short-term exposure suggests clearance of these compounds from the nasal passages within 24 hours. The levels of S-sulfonates observed in NAL fluid in this study are almost three orders of magnitude higher than those measured in plasma following similar SO2 exposures. Measurement of S-sulfonates in the nasal passage may be an effective short-term biomarker of exposure to SO2.
W E Bechtold; J J Waide; T Sandström; N Stjernberg; D McBride; J Koenig; I Y Chang; R F Henderson
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Publication Detail:
Type:  Journal Article; Research Support, U.S. Gov't, P.H.S.    
Journal Detail:
Title:  Journal of exposure analysis and environmental epidemiology     Volume:  3     ISSN:  1053-4245     ISO Abbreviation:  J Expo Anal Environ Epidemiol     Publication Date:    1993 Oct-Dec
Date Detail:
Created Date:  1994-06-06     Completed Date:  1994-06-06     Revised Date:  2007-11-14    
Medline Journal Info:
Nlm Unique ID:  9111438     Medline TA:  J Expo Anal Environ Epidemiol     Country:  UNITED STATES    
Other Details:
Languages:  eng     Pagination:  371-82     Citation Subset:  IM    
Inhalation Toxicology Research Institute, Lovelace Biomedical and Environmental Research Institute, Albuquerque, New Mexico.
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MeSH Terms
Environmental Exposure*
Nasal Lavage Fluid / chemistry*
Sulfonic Acids / analysis*
Sulfur Dioxide / pharmacokinetics*
Time Factors
Grant Support
Reg. No./Substance:
0/Sulfonic Acids; 7446-09-5/Sulfur Dioxide

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine

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