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Updated: Jun 3, 2026
Rapid Quantification of Oxidized and Reduced Forms of Glutathione Using Ortho -phthalaldehyde in Cultured Mammalian Cells In Vitro
Published on: June 28, 2024
Microtiter plate technique for the measurement of glutathione in fresh and cryopreserved lymphoblasts using the
1Paediatric Oncology Laboratory, Cancer Research Unit, University of Newcastle Upon Tyne, Medical School, Newcastle Upon Tyne, UK.
Abstract:
Glutathione is an intracellular, nonprotein thiol that appears to play an important role in protection of the cell against cytotoxic drugs (1) and has been implicated in the control of cell cycling (2,3) and apoptosis (4,5). It can exist in an oxidized (disulfide, [GSSG]) and a reduced (sulphydryl, [GSH]) form. In general, GSSG comprises less than 1% of the total intracellular glutathione. In circumstances of oxidative stress, GSH dimerizes to form glutathione disulfide (GSSG), making protons available to neutralize reactive oxygen species (Reaction 1). In vivo, reduction of GSSG is catalysed by glutathione reductase, efficiently regenerating high intracellular GSH levels (Reaction 2).
