Glutathione transporter (GSH transporter)

Glutathione transporters are a group of membrane proteins, including the Multidrug Resistance-associated Protein (MRP) family (e.g., ABCC1, ABCC2) and the System xc- cystine/glutamate antiporter (SLC7A11), that regulate the distribution of the antioxidant glutathione (GSH) across cellular membranes (Ballatori et al., 2009). In the oral mucosa, these transporters are essential for maintaining redox homeostasis and protecting epithelial cells from oxidative stress induced by inflammation or cytotoxic therapies (N'Guessan et al., 2022). During conditions like oral mucositis, the depletion of intracellular GSH—often due to altered transporter activity or increased consumption by reactive oxygen species—exacerbates tissue damage (Sonis, 2004). Therapeutic interventions target these transporters to restore GSH levels, either by promoting the uptake of precursors like N-acetylcysteine via SLC7A11 or by modulating the efflux of GSH and its conjugates via MRPs (Koppula et al., 2018). However, because these transporters also mediate the efflux of various drugs, they are significant factors in multi-drug resistance in oral cancers, making them complex therapeutic targets that require precise modulation.

Other names

Multidrug resistance-associated proteinMRPSystem xc-SLC7A11ABCC1ABCC2Glutathione-S-conjugate-translocating ATPaseGSH efflux pumpGSH transporters on inflamed oral mucosa

Regulation of intracellular and extracellular glutathione concentrations to maintain redox balance and facilitate the detoxification of reactive oxygen species and electrophilic xenobiotics.