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• W1569772723 endingPage "266" @default.
• W1569772723 startingPage "245" @default.
• W1569772723 abstract "Oxidative damage by reactive nitrogen species is linked to the pathogenesis of numerous inflammatory disorders, including atherosclerosis. 3-Nitrotyrosine (NO2Tyr), a posttranslational modification of proteins generated by reactive nitrogen species, serves as a molecular fingerprint for protein modification by nitric oxide (NO)-derived oxidants. Studies demonstrate that systemic levels of protein-bound NO2Tyr serve as an independent predictor of cardiovascular risks and are modulated by statin therapy. Measurement of NO2Tyr in biological matrices may thus serve both as a quantitative index of nitrative stress in vivo and an important new prognostic marker of clinical relevance. Analytical methods for the accurate detection and quantification of trace levels of NO2Tyr in biological tissues and fluids are, thus, of considerable interest. Here, we describe a rapid, sensitive, and specific method for the quantification of NO2Tyr in biological matrices using readily available benchtop ion-trap mass spectrometry instrumentation (e.g., LCQDeca) combined with high-performance liquid chromatography (HPLC) interface. Through judicious use of stable isotopically labeled precursors as synthetic internal standards, the tandem mass spectrometric method described simultaneously adjusts for potential intrapreparative sample losses and monitors potential artifactual generation of NO2Tyr during processing. The described method permits rapid and reproducible quantification of NO2Tyr in biological and clinical specimens at the 100 fmol on column detection limit and should prove useful for studies defining the impact of reactive nitrogen species in cardiovascular disease and other inflammatory disorders." @default.
• W1569772723 created "2016-06-24" @default.
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• W1569772723 creator A5055849986 @default.
• W1569772723 creator A5060631280 @default.
• W1569772723 date "2005-01-01" @default.
• W1569772723 modified "2023-10-06" @default.
• W1569772723 title "Quantification of 3‐Nitrotyrosine Levels Using a Benchtop Ion Trap Mass Spectrometry Method" @default.
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• W1569772723 doi "https://doi.org/10.1016/s0076-6879(05)96022-9" @default.
• W1569772723 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/16291237" @default.
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