Glutathione disulfide

Summary

Glutathione disulfide (GSSG) is the oxidized dimeric form of glutathione, formed when two glutathione molecules are oxidized and linked by a disulfide bond. It serves as a key indicator of oxidative stress and redox status within cells. GSSG is recycled to reduced glutathione (GSH) by glutathione reductase. It is used as a research tool and biochemical reagent; therapeutic applications are largely investigational.

Mechanism of Action

Oxidized form of glutathione (GSH); acts as a substrate for glutathione reductase, which reduces GSSG back to two molecules of GSH using NADPH, thereby regenerating the cellular antioxidant pool. GSSG itself can modulate redox signaling and protein thiol status through glutathionylation of cysteine residues.

Routes of Administration

Goals & Uses

• Redox status biomarkerResearch / DiagnosticsHigh
• Oxidative stress researchResearch ToolHigh
• Antioxidant system supportCellular ProtectionLow
• Protein glutathionylation modulationRedox SignalingModerate

Contraindications

• Known hypersensitivity to glutathione compoundsAllergyHigh
• High systemic GSSG levels (severe oxidative stress)PathophysiologyModerate

Adverse Effects

• Injection site reactionsLocalUncommon
• NauseaGastrointestinalUncommonFeeling of sickness or urge to vomit
• Pro-oxidant effects at high concentrationsOxidative ToxicityUnknown

Drug Interactions

• Glutathione reductase inhibitorsModerate
• Cisplatin and platinum-based chemotherapeuticsModerate

Population Constraints

• PregnancyReproductive SafetyRelative
• Glucose-6-phosphate dehydrogenase (G6PD) deficiencyGenetic / MetabolicRelative
• NeonatesPediatricRelative

Regulatory Status

• European UnionUnapprovedNot EMA-approved; no marketing authorization for therapeutic use.
• United StatesUnapprovedNot FDA-approved as a drug; used as a research reagent and biochemical tool.
• United KingdomUnapprovedNot MHRA-approved as a medicinal product.

GSSG is not approved as a drug by FDA, EMA, or MHRA. It is used as a biochemical reagent and research compound. Some compounded or nutraceutical preparations exist, but these lack formal regulatory approval for therapeutic use.

Evidence & Sources

No sources recorded yet.