國家衛生研究院 NHRI:Item 3990099045/2435
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    題名: Quantification of urinary N-acetyl-S-(propionamide)cysteine using an on-line clean-up system coupled with liquid chromatography/tandem mass spectrometry
    作者: Li, CM;Hu, CW;Wu, KY
    貢獻者: Division of Environmental Health and Occupational Medicine
    摘要: Acrylamide has been reported to be present in high-temperature processed foods and normal processed food intake could lead to significant acrylamide exposure. Acrylamide in vivo can be conjugated with glutathione in the presence of glutathione transferase. This conjugation product is further metabolized and excreted as N-acetyl-S-(propionamide)cysteine (NASPC) in the urine. NASPC could be considered a biomarker for acrylamide exposure. The objective of this study was to develop a highly specific, rapid and sensitive method to quantify urinary NASPC, serving as a biomarker for acrylamide exposure assessment. Isotope-labeled [C-13(3)]NASPC was successfully synthesized and used as an internal standard. This urine mixture was directly analyzed using a newly developed liquid chromatographic/tandem mass spectrometric method coupled with an on-line clean-up system. The detection limit for this method was estimated as < 5 μ g l(-1)(0.4 pmol) on-column. The method was applied to measure the urinary level of NASPC in 70 apparently health subjects. The results showed that the NASPC urinary level was highly associated with smoking. Smokers had a significantly higher urinary NASPC level (135 &PLUSMN; 88 μ g g(-1) creatinine) than non-smokers (76 &PLUSMN; 30 μ g g(-1) creatinine). A highly sensitive and selective LC/MS/MS isotope dilution method was successfully established. With an on-line clean-up system, this system is capable of routine high-throughput analysis and accurate quantitation of NASPC in urine. This could be a useful tool for health surveillance for acrylamide exposure in a population for future study.
    關鍵詞: Biophysics;Chemistry, Organic;Spectroscopy
    日期: 2005-04
    關聯: Journal of Mass Spectrometry. 2005 Apr;40(4):511-515.
    Link to: http://dx.doi.org/10.1002/jms.823
    JIF/Ranking 2023: http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcAuth=NHRI&SrcApp=NHRI_IR&KeyISSN=1076-5174&DestApp=IC2JCR
    Cited Times(WOS): https://www.webofscience.com/wos/woscc/full-record/WOS:000228913300010
    Cited Times(Scopus): http://www.scopus.com/inward/record.url?partnerID=HzOxMe3b&scp=18344389347
    顯示於類別:[吳焜裕(2001-2008)] 期刊論文

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