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Separation and Detection of Tyrosine and Phenylalanine-derived Oxidative Stress Biomarkers Using Microchip Electrophoresis with Electrochemical Detection
Weerasekara, Dhanushka B. ; Lunte, Susan M.
Weerasekara, Dhanushka B.
Lunte, Susan M.
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Abstract
A method for the determination of selected aromatic amino acid biomarkers of oxidative stress using microchip electrophoresis with electrochemical detection is described. The separation of the major reaction products of phenylalanine and tyrosine with reactive nitrogen and oxygen species was accomplished using ligand exchange micellar electrokinetic chromatography with a PDMS/glass hybrid chip. Electrochemical detection was achieved using a pyrolyzed photoresist film working electrode. The system was evaluated for the analysis of the products of the Fenton reaction with tyrosine and phenylalanine, and the reaction of peroxynitrite with tyrosine.
Description
This is the peer reviewed version of the following article: D. B. Weerasekara, S. M. Lunte, Electroanalysis 2022, 34, 1913, which has been published in final form at https://doi.org/10.1002/elan.202100580. This article may be used for non-commercial purposes in accordance with Wiley Terms and Conditions for Use of Self-Archived Versions. This article may not be enhanced, enriched or otherwise transformed into a derivative work, without express permission from Wiley or by statutory rights under applicable legislation. Copyright notices must not be removed, obscured or modified. The article must be linked to Wiley’s version of record on Wiley Online Library and any embedding, framing or otherwise making available the article or pages thereof by third parties from platforms, services and websites other than Wiley Online Library must be prohibited.
Date
2021-12-31
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Wiley
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Keywords
Reactive nitrogen and oxygen species, Microchip electrophoresis with electrochemical detection, Hydroxyl radical, Peroxynitrite, Tyrosine
Citation
Weerasekara, D. B., & Lunte, S. M. (2022). Separation and Detection of Tyrosine and Phenylalanine-derived Oxidative Stress Biomarkers Using Microchip Electrophoresis with Electrochemical Detection. Electroanalysis, 34(12), 1913–1927. https://doi.org/10.1002/elan.202100580