Abstract
Aminothiols serve numerous vital functions in biochemistry, including detoxification and regulation of cellular metabolism, enzymatic activity, and protein trafficking and degradation. Plasma aminothiol concentrations are frequently measured for clinical and translational research investigating oxidative stress, and for routine clinical diagnosis and monitoring of vascular injury. Although a variety of techniques are available to measure aminothiol concentrations in plasma, high performance liquid chromatography with fluorescence detection (HPLC–FD) is the most widely used. This review summarizes HPLC–FD methods, including pre-analytical considerations, procedures for sample reduction, derivatization, and chromatographic separation of the primary biological aminothiols cysteine, homocysteine, cysteinylglycine, and glutathione in human plasma.
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