國家衛生研究院 NHRI:Item 3990099045/5538

NHRI > National Institute of Environmental Health Sciences > Saou-Hsing Liou > Periodical Articles > Item 3990099045/5538

Please use this identifier to cite or link to this item: http://ir.nhri.org.tw/handle/3990099045/5538

Title:	Comparative analysis of urinary N7-(2-hydroxyethyl)guanine for ethylene oxide- and non-exposed workers
Authors:	Huang, CC;Wu, CF;Shih, WC;Chen, MF;Chen, CY;Chien, YC;Liou, SH;Chiang, SY;Wu, KY
Contributors:	Division of Environmental Health and Occupational Medicine
Abstract:	Ethylene oxide (EO), a direct alkylating agent and a carcinogen, can attack the nucleophilic sites of DNA bases to form a variety of DNA adducts. The most abundant adduct, N7-(2-hydroxyethyl)guanine (N7-HEG), can be depurinated spontaneously or enzymatically from DNA backbone to form abasic sites. Molecular dosimetry of the excised N7-HEG in urine can serve as an EO exposure and potential risk-associated biomarker. This study was to analyze N7-HEG in urine collected from 89 EO-exposed and 48 nonexposed hospital workers and 20 exposed and 10 nonexposed factory workers by using our newly developed on-line solid-phase extraction isotope-dilution LC-MS/MS method. Statistical analysis of data shows that the exposed factory workers excreted significantly greater concentrations of N7-HEG than both the nonexposed factory workers and hospital workers. Multiple linear regression analysis reveals that the EO-exposed factory workers had a significantly greater post-shift urinary N7-HEG than their nonexposed coworkers and hospital workers. These results demonstrate that analysis of urinary N7-HEG can serve as a biomarker of EO exposure for future molecular epidemiology studies to better understand the role of the EO-induced DNA adduct formation in EO carcinogenicity and certainly for routine surveillance of occupational EO exposure for the study of potential health impacts on workers.
Date:	2011-05
Relation:	Toxicology Letters. 2011 May;202(3):237-243.
Link to:	http://dx.doi.org/10.1016/j.toxlet.2011.02.009
JIF/Ranking 2023:	http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcAuth=NHRI&SrcApp=NHRI_IR&KeyISSN=0378-4274&DestApp=IC2JCR
Cited Times(WOS):	https://www.webofscience.com/wos/woscc/full-record/WOS:000290778600011
Cited Times(Scopus):	http://www.scopus.com/inward/record.url?partnerID=HzOxMe3b&scp=79954594103
Appears in Collections:	[Saou-Hsing Liou] Periodical Articles

Files in This Item:

File	Description	Size	Format
PB2011032511.pdf		448Kb	Adobe PDF	707	View/Open

Loading...