3-S-Glutathionylacetaminophen: molecular mechanisms & dependencies

How nutrients influence it

Every nutrient with a recorded effect on this component, credited to the nutrient that acted rather than the chapter that recorded it. Open a nutrient to see the findings and the conditions they were measured under.

Human evidence only

How nutrients reach it in more than one step

Chains of two or more recorded steps that end here, grouped by the nutrient they start from. Each step is a separate finding, so a chain is a route a mechanism could take, not proof that it does.

Tracing routes…

What it does

Every recorded relationship this component is part of, grouped by its role. Plain wording comes first; the technical statement follows.

Recorded relationships

Where it participates (unsigned role)

Using acetaminophen as a probe, at low concentrations it is converted in a cooxidation reaction with arachidonic acid to the dimer 4,4-dihydroxy-3,3-biacetanilide and other polymeric products, and the electrophilic metabolite N-acetyl-p-benzoquinone imine was detected directly and indirectly by its reaction with glutathione to form 3-S-glutathionylacetaminophen; the same products were formed by the synthase with hydrogen peroxide in reactions not inhibited by indomethacin, and formation of all products was inhibited by ascorbic acid and butylated hydroxyanisole.
Cyclooxygenase-1 (PTGS1) → N-Acetyl-p-benzoquinone imine / NAPQI source_derived_draftungraded
Experimental context and source evidence
evidence_span
{"source_cache": "artifacts/paracetamol-research/3124965.abstract.txt", "locator": "Indexed abstract; zero-based, end-exclusive Unicode character offsets", "file_sha256": "dcc85a1ab66984973092042b5553f43fbbe5eb10b674614c9b1fa991b3969502", "start_char": 0, "end_char": 2236, "text_sha256": "dcc85a1ab66984973092042b5553f43fbbe5eb10b674614c9b1fa991b3969502"}
experimental_model
Ram seminal vesicle microsomal prostaglandin H synthase with product identification by cooxidation
exposure
Acetaminophen from 20 micromolar to above 10 millimolar, with glutathione, ascorbate and indomethacin
limitations
Shows that the drug both stimulates and inhibits the same enzyme depending on concentration, and that the enzyme makes NAPQI from it. A microsomal preparation at concentrations far above therapeutic.
nutrient_topic
Paracetamol research collection; topical membership is not evidence of a direct clinical effect, and the drug is recorded separately from the metabolites NAPQI and AM404. · Paracetamol
organism
Sheep
plain_language
The prostaglandin enzyme can itself turn the drug into the liver-damaging metabolite.
primary_references
[apap-p3124965] Acetaminophen and analogs as cosubstrates and inhibitors of prostaglandin H synthase. (1988). https://pubmed.ncbi.nlm.nih.gov/3124965/ DOI: 10.1016/0009-2797(88)90101-9
tissue_or_cell_type
Seminal vesicle microsomes
Paracetamol: the enzyme it reduces rather than blocks, the isoform that turned out not to exist, the metabolite that carries the analgesia, and the metabolite that destroys the liver (2026-09-22) · lines 129–140
AI-assisted literature curation; primary study URLs and scope retained in the document and extraction. Not publisher full text. · supports · Ram seminal vesicle microsomal prostaglandin H synthase with product identification by cooxidation · source_derived_draft · unverified_draft
### apap-the-enzyme-makes-napqi Using acetaminophen as a probe, at low concentrations it is converted in a cooxidation reaction with arachidonic acid to the dimer 4,4-dihydroxy-3,3-biacetanilide and other polymeric products, and the electrophilic metabolite N-acetyl-p-benzoquinone imine was detected directly and indirectly by its reaction with glutathione to form 3-S-glutathionylacetaminophen; the same products were formed by the synthase with hydrogen peroxide in reactions not inhibited by indomethacin, and formation of all products was inhibited by ascorbic acid and butylated hydroxyanisole. Condition category: normal nutrient_topic: Paracetamol research collection; topical membership is not evidence of a direct clinical effect, and the drug is recorded separately from the metabolites NAPQI and AM404. plain_language: The prostaglandin enzyme can itself turn the drug into the liver-damaging metabolite. organism: Sheep tissue_or_cell_type: Seminal vesicle microsomes experimental_model: Ram seminal vesicle microsomal prostaglandin H synthase with product identification by cooxidation limitations: Shows that the drug both stimulates and inhibits the same enzyme depending on concentration, and that the enzyme makes NAPQI from it. A microsomal preparation at concentrations far above therapeutic. exposure: Acetaminophen from 20 micromolar to above 10 millimolar, with glutathione, ascorbate and indomethacin evidence_span: {"source_cache": "artifacts/paracetamol-research/3124965.abstract.txt", "locator": "Indexed abstract; zero-based, end-exclusive Unicode character offsets", "file_sha256": "dcc85a1ab66984973092042b5553f43fbbe5eb10b674614c9b1fa991b3969502", "start_char": 0, "end_char": 2236, "text_sha256": "dcc85a1ab66984973092042b5553f43fbbe5eb10b674614c9b1fa991b3969502"} [apap-p3124965] Acetaminophen and analogs as cosubstrates and inhibitors of prostaglandin H synthase. (1988). https://pubmed.ncbi.nlm.nih.gov/3124965/ DOI: 10.1016/0009-2797(88)90101-9
Complete structured claim and evidence
Adding GSH decreased covalent microsomal protein binding while forming 3-S-glutathionylacetaminophen.
GSH → N-Acetyl-p-benzoquinone imine / NAPQI source_derived_draftungraded
Experimental context and source evidence
evidence_span
{"source_cache": "artifacts/glutathione-research/6424115.abstract.txt", "locator": "Primary indexed abstract; zero-based, end-exclusive Unicode character offsets", "file_sha256": "8c45563e89388d200eb64ae63d12b388ef5cca91369a585157ef27b39f525b08", "start_char": 0, "end_char": 1307, "text_sha256": "8c45563e89388d200eb64ae63d12b388ef5cca91369a585157ef27b39f525b08"}
experimental_model
Enzyme oxidation and radiolabeled binding assays
exposure
NAPQI or acetaminophen with reductants
limitations
Experimental chemistry; no new human dose threshold or treatment regimen is inferred.
nutrient_topic
Glutathione research collection; topical membership is not evidence of a direct dietary effect. · GSH
organism
Mouse microsomes and cell-free cytochrome-P450 system
plain_language
Glutathione diverted the reactive metabolite into a conjugate.
primary_references
[glutathione-p6424115] N-acetyl-p-benzoquinone imine: a cytochrome P-450-mediated oxidation product of acetaminophen. (1984). https://pubmed.ncbi.nlm.nih.gov/6424115/ DOI: 10.1073/pnas.81.5.1327
tissue_or_cell_type
Acetaminophen reactive-metabolite handling
Glutathione: metabolism, signaling and nutrient connections (2026-09-17) · lines 1035–1046
AI-assisted literature curation; primary study URLs and scope retained in the document and extraction. Not publisher full text. · supports · Enzyme oxidation and radiolabeled binding assays · source_derived_draft · unverified_draft
### glutathione-napqi-conjugation Adding GSH decreased covalent microsomal protein binding while forming 3-S-glutathionylacetaminophen. Condition category: normal nutrient_topic: Glutathione research collection; topical membership is not evidence of a direct dietary effect. plain_language: Glutathione diverted the reactive metabolite into a conjugate. organism: Mouse microsomes and cell-free cytochrome-P450 system tissue_or_cell_type: Acetaminophen reactive-metabolite handling experimental_model: Enzyme oxidation and radiolabeled binding assays limitations: Experimental chemistry; no new human dose threshold or treatment regimen is inferred. exposure: NAPQI or acetaminophen with reductants evidence_span: {"source_cache": "artifacts/glutathione-research/6424115.abstract.txt", "locator": "Primary indexed abstract; zero-based, end-exclusive Unicode character offsets", "file_sha256": "8c45563e89388d200eb64ae63d12b388ef5cca91369a585157ef27b39f525b08", "start_char": 0, "end_char": 1307, "text_sha256": "8c45563e89388d200eb64ae63d12b388ef5cca91369a585157ef27b39f525b08"} [glutathione-p6424115] N-acetyl-p-benzoquinone imine: a cytochrome P-450-mediated oxidation product of acetaminophen. (1984). https://pubmed.ncbi.nlm.nih.gov/6424115/ DOI: 10.1073/pnas.81.5.1327
Complete structured claim and evidence

The events it takes part in

A mechanism often involves more than two components. These are the full events, with every participant and its role.

Situations it appears in

Low-supply and faulty-machinery situations recorded in the chapters where this component plays a part.

In the sources

Preserved passages that mention this component, quoted exactly. Open one to read it in context.

Open hypotheses

Proposed ideas that involve this component. They are labeled as hypotheses and do not change any recorded statement.

This is a research prototype built from draft material. It is not medical advice, and its statements still await verification against the original studies.

3-S-Glutathionylacetaminophen