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Characterization of protein adducts formed by toxic alkaloids by nano-scale liquid chromatography with mass spectrometry.
MedLine Citation:
PMID:  23019161     Owner:  NLM     Status:  In-Data-Review    
Abstract/OtherAbstract:
Betel quid chewing is associated with cytotoxicity, genotoxicity and carcinogenicity in diseases such as oral cancer, liver cirrhosis, hepatocellular carcinoma and diabetes mellitus. Arecoline and arecaidine, which are the main alkaloids in the areca nut, are potential exposure biomarkers in habitual betel quid users. This study developed a method of detecting arecoline- and arecaidine-protein adducts by mass spectrometry (MS). First, bovine serum albumin was used to predict and confirm the binding sites of proteins modified by arecoline or arecaidine. Cells were then treated with arecoline to identify new protein adducts after cellular metabolic processing. Finally, human plasma was used to model long-term exposure to arecoline and arecaidine. Following isolation proteins were tryspin digested. The peptides afforded were separated and analyzed by nano-scale liquid chromatography with MS using an LTQ Orbitrap mass spectrometer. The experimental findings showed that cysteine is the predominant amino acid in protein adduct formation. The goal of this study was to establish a screening platform for identifying novel protein adducts that form covalent bonds with arecoline or arecaidine. Use of this strategy to survey new protein-toxic adducts may help to identify novel biomarkers of betel nut exposure. Copyright © 2012 John Wiley & Sons, Ltd.
Authors:
Chi-Hsien Chou; Lea-Yea Chuang; Wei-Lung Tseng; Chi-Yu Lu
Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  Journal of mass spectrometry : JMS     Volume:  47     ISSN:  1096-9888     ISO Abbreviation:  J Mass Spectrom     Publication Date:  2012 Oct 
Date Detail:
Created Date:  2012-09-28     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  9504818     Medline TA:  J Mass Spectrom     Country:  England    
Other Details:
Languages:  eng     Pagination:  1303-12     Citation Subset:  IM    
Copyright Information:
Copyright © 2012 John Wiley & Sons, Ltd.
Affiliation:
Graduate Institute of Medicine, College of Medicine, Kaohsiung Medical University, Kaohsiung, 80708, Taiwan.
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