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- W1900488781 abstract "RATIONALE In recent years, methylated nucleosides have been considered to be potential biomarkers to human diseases. The early diagnosis of coronary artery disease (CAD) is an unsolved problem in clinical cardiology. The aim of our study is to evaluate whether urinary methylated nucleosides can serve as useful biomarkers for CAD. METHODS A solid-phase extraction (SPE) column was used for extraction and purification of methylated nucleosides in urine, and high-performance liquid chromatography/electrospray ionization tandem mass spectrometry (HPLC/ESI-MS/MS) was employed for specific, sensitive and rapid determination of the urinary methylated nucleosides from patients with cardiac events. RESULTS We have analyzed six methylated nucleosides (N3-methylcytidine, N1-methyladenosine, N6-methyladenosine, N2-methylguanosine, N1-methylguanosine and N2,N2-dimethylguanosine) in urine from 51 patients with CAD and 25 non-CAD controls by HPLC/ESI-MS/MS using selective reaction monitoring (SRM). Our results have shown that there were significant differences in the N6-methyladenosine levels from the patients and the non-CAD controls in the urine analyzed. CONCLUSIONS The results have indicated that HPLC/ESI-MS/MS is a highly specific and sensitive tool to measure urinary methylated nucleosides for analysis of CAD. Our result has revealed that the evaluation of urinary methylated nucleosides might be helpful in the analysis of CAD by liquid chromatography/mass spectrometry. Therefore, this N6-methyladenosine is worthy of further studies in the near future. Copyright © 2014 John Wiley & Sons, Ltd." @default.
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- W1900488781 date "2014-08-14" @default.
- W1900488781 modified "2023-09-27" @default.
- W1900488781 title "Analysis of urinary methylated nucleosides of patients with coronary artery disease by high-performance liquid chromatography/electrospray ionization tandem mass spectrometry" @default.
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- W1900488781 doi "https://doi.org/10.1002/rcm.6986" @default.
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