Synthesis and electrospray mass spectrometric analysis of aristolochic acid Ⅰ-DNA adduct / 基础医学与临床
Basic & Clinical Medicine
;
(12)2006.
Article
Dans Chinois
| WPRIM
| ID: wpr-589259
ABSTRACT
Objective To synthesize aristolochic acid Ⅰ(AAⅠ)-DNA adduct in vitro and to develop a method for the characterization of the adduct. Methods Aristolochic acid (AA) was incubated with 2′-Deoxyadenosine 5′-monophosphate in vitro using either enzymatic activation (by xanthine oxidase) or chemical activation (by zinc) to synthesize AAⅠ-DNA adduct. The AAⅠ-DNA adduct was characterized by the liquid chromatography electrospray ionization/tandem mass spectrometry (LC-ESI-MS/MS). Results AAⅠ-DNA adduct was prepared by two activation methods. Full scan spectra were obtained in the negative ion mode and the quasi-molecular ion peak was m/z 621. Analysis by electrospray ionization/tandem mass spectrometry (ESI-MS/MS) provided useful structural information about AAⅠ-DNA adduct. Conclusion AAⅠ can bind covalently to the exocyclic amino group of purine nucleotides to form AAⅠ-DNA adduct. LC/MS/MS is a practical tool to detect AAⅠ-DNA adduct.
Texte intégral:
Disponible
Indice:
WPRIM (Pacifique occidental)
langue:
Chinois
Texte intégral:
Basic & Clinical Medicine
Année:
2006
Type:
Article
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