Abstract
Hydroethidine is a fluorogenic probe that in the presence of the superoxide radical anion is oxidized to a red fluorescent product, 2-hydroxyethidium. In cells, hydroethidine is also oxidized to other products, including red fluorescent ethidium. Thus, selective monitoring of 2-hydroxyethidium is required for specific detection of the superoxide radical anion. Here, we provide protocols for HPLC- and LC-MS-based quantitation of 2-hydroxyethidium, among other oxidation products. Also, a protocol for continuous sampling for real-time monitoring of superoxide production using rapid HPLC measurements of 2-hydroxyethidium is described.
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Acknowledgment
This work was supported by NIH grants NCI U01 CA178960 and R01 AA022986 to B.K.
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Zielonka, J., Zielonka, M., Kalyanaraman, B. (2019). HPLC-Based Monitoring of Oxidation of Hydroethidine for the Detection of NADPH Oxidase-Derived Superoxide Radical Anion. In: Knaus, U., Leto, T. (eds) NADPH Oxidases. Methods in Molecular Biology, vol 1982. Humana, New York, NY. https://doi.org/10.1007/978-1-4939-9424-3_14
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DOI: https://doi.org/10.1007/978-1-4939-9424-3_14
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