Component
Human glutathione peroxidase activity, isoform unresolved
Human glutathione peroxidase activity, isoform unresolved. Species, exposure and limitations are retained in each linked claim.
2 recorded relationships. Experimental role, claim status and evidence remain attached to each record.
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.
Other things that act on it
Enzymes, hormones, genes, and other components with a recorded effect. These are not nutrients, so they do not count toward the arrows above. Each finding names the chapter that recorded it.
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.
What acts on it
Mangiferin opposed H2O2-associated loss of glutathione peroxidase expression and activity.
Experimental context and source evidence
- evidence_span
- {"source_cache": "artifacts/mangiferin-research/38586992.abstract.txt", "locator": "Primary indexed abstract; zero-based, end-exclusive Unicode character offsets", "file_sha256": "3568135f9e3471d748a1f42c7ed136800b1cb9d017ebd9aa1522de71b71a72be", "start_char": 0, "end_char": 1792, "text_sha256": "3568135f9e3471d748a1f42c7ed136800b1cb9d017ebd9aa1522de71b71a72be"}
- experimental_model
- Hydrogen-peroxide challenge with pharmacological HO-1 inhibition
- exposure
- Mangiferin before H2O2 exposure
- limitations
- Cell protection is not demonstrated retinal clinical efficacy; GPx isoforms unresolved and expression is not cofactor sufficiency.
- nutrient_topic
- Mangiferin research collection; topical membership is not evidence of a direct dietary effect. · Mangiferin
- organism
- Homo sapiens
- plain_language
- Peroxide-processing enzyme activity was preserved; the isoform remains unspecified.
- primary_references
- [mangiferin-p38586992] Activation of Heme Oxygenase-1 by Mangiferin in Human Retinal Pigment Epithelial Cells Contributes to Blocking Oxidative Damage. (2024). https://pubmed.ncbi.nlm.nih.gov/38586992/ DOI: 10.4062/biomolther.2023.175
- tissue_or_cell_type
- ARPE-19 retinal pigment epithelial cells
Mangiferin: metabolism, signaling and nutrient connections (2026-09-17) · lines 627–638
AI-assisted literature curation; primary study URLs and scope retained in the document and extraction. Not publisher full text. · supports · Hydrogen-peroxide challenge with pharmacological HO-1 inhibition · source_derived_draft · unverified_draft
### mangiferin-rpe-gpx Mangiferin opposed H2O2-associated loss of glutathione peroxidase expression and activity. Condition category: normal nutrient_topic: Mangiferin research collection; topical membership is not evidence of a direct dietary effect. plain_language: Peroxide-processing enzyme activity was preserved; the isoform remains unspecified. organism: Homo sapiens tissue_or_cell_type: ARPE-19 retinal pigment epithelial cells experimental_model: Hydrogen-peroxide challenge with pharmacological HO-1 inhibition limitations: Cell protection is not demonstrated retinal clinical efficacy; GPx isoforms unresolved and expression is not cofactor sufficiency. exposure: Mangiferin before H2O2 exposure evidence_span: {"source_cache": "artifacts/mangiferin-research/38586992.abstract.txt", "locator": "Primary indexed abstract; zero-based, end-exclusive Unicode character offsets", "file_sha256": "3568135f9e3471d748a1f42c7ed136800b1cb9d017ebd9aa1522de71b71a72be", "start_char": 0, "end_char": 1792, "text_sha256": "3568135f9e3471d748a1f42c7ed136800b1cb9d017ebd9aa1522de71b71a72be"} [mangiferin-p38586992] Activation of Heme Oxygenase-1 by Mangiferin in Human Retinal Pigment Epithelial Cells Contributes to Blocking Oxidative Damage. (2024). https://pubmed.ncbi.nlm.nih.gov/38586992/ DOI: 10.4062/biomolther.2023.175
Complete structured claim and evidenceAstaxanthin increased measured glutathione-peroxidase activity in the HUVEC experiment.
Experimental context and source evidence
- evidence_access
- Primary abstract
- experimental_model
- Human endothelial-cell enzyme-activity assay.
- limitations
- The assay does not resolve the GPX isoform, demonstrate selenium repletion, or quantify glutathione synthesis.
- nutrient_topic
- Astaxanthin collection; molecular form, preparation, species, exposure and manipulation remain explicit. · Astaxanthin
- plain_language
- The antioxidant enzyme response changed as well.
- primary_references
- Astaxanthin Induces the Nrf2/HO-1 Antioxidant Pathway in Human Umbilical Vein Endothelial Cells by Generating Trace Amounts of ROS. · 2018 · https://pubmed.ncbi.nlm.nih.gov/29381356/ · DOI 10.1021/acs.jafc.7b05493
Astaxanthin: transport, membrane chemistry, signaling and nutrient interactions (2026-09-19) · lines 238–244
AI-assisted research curation; primary-abstract references and experimental limitations individually identified. Not publisher full text. · supports · Human endothelial-cell enzyme-activity assay. · source_derived_draft · unverified_draft
## astaxanthin-gpx-activity The antioxidant enzyme response changed as well. Astaxanthin increased measured glutathione-peroxidase activity in the HUVEC experiment. Model: Human endothelial-cell enzyme-activity assay. Limitations: The assay does not resolve the GPX isoform, demonstrate selenium repletion, or quantify glutathione synthesis. Evidence access: Primary abstract Astaxanthin Induces the Nrf2/HO-1 Antioxidant Pathway in Human Umbilical Vein Endothelial Cells by Generating Trace Amounts of ROS. · 2018 · https://pubmed.ncbi.nlm.nih.gov/29381356/ · DOI 10.1021/acs.jafc.7b05493
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.