Component
15-epi-lipoxin A4
15-epi-lipoxin A4. Species, exposure and limitations are retained in each linked claim.
1 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.
Where it participates (unsigned role)
Aspirin triggered transcellular biosynthesis of a previously unrecognised class of eicosanoids during coincubations of human umbilical vein endothelial cells and neutrophils, generated with aspirin but not by indomethacin, salicylate or dexamethasone, enhanced by interleukin-1-beta which induced cyclooxygenase-2 but not 15-lipoxygenase; four products proved to be 15R-epimers of lipoxins, two were potent inhibitors of leukotriene B4-mediated neutrophil adhesion to endothelium, with 15-epi-lipoxin A4 active in the nanomolar range, an example of a drug pirating endogenous biosynthetic mechanisms to trigger new mediators.
Experimental context and source evidence
- evidence_span
- {"source_cache": "artifacts/aspirin-research/7568157.abstract.txt", "locator": "Indexed abstract; zero-based, end-exclusive Unicode character offsets", "file_sha256": "d9e7b80265068fb60f67e97c9d46de7a25e0099151b6d7fbc688f70a29ee9b9b", "start_char": 0, "end_char": 2036, "text_sha256": "d9e7b80265068fb60f67e97c9d46de7a25e0099151b6d7fbc688f70a29ee9b9b"}
- experimental_model
- Coincubations of human umbilical vein endothelial cells and neutrophils with physical characterisation of the products
- exposure
- Aspirin compared against indomethacin, salicylate and dexamethasone, with interleukin-1-beta induction and several costimuli
- limitations
- The comparator set is what makes this strong: three other anti-inflammatory drugs including salicylate failed to produce the same products. It is a cell coincubation, and the nanomolar activity is measured on adhesion in vitro.
- nutrient_topic
- Aspirin research collection; topical membership is not evidence of a direct clinical effect, and aspirin is recorded separately from salicylate, the metabolite it becomes. · Aspirin / acetylsalicylic acid
- organism
- Human cells
- plain_language
- Aspirin, and not the other anti-inflammatories tested, makes the body build a mediator it otherwise never makes.
- primary_references
- [asa-p7568157] Aspirin triggers previously undescribed bioactive eicosanoids by human endothelial cell-leukocyte interactions. (1995). https://pubmed.ncbi.nlm.nih.gov/7568157/ DOI: 10.1073/pnas.92.21.9475
- tissue_or_cell_type
- Endothelium and neutrophils
AI-assisted literature curation; primary study URLs and scope retained in the document and extraction. Not publisher full text. · supports · Coincubations of human umbilical vein endothelial cells and neutrophils with physical characterisation of the products · source_derived_draft · unverified_draft
### asa-aspirin-triggers-lipoxins Aspirin triggered transcellular biosynthesis of a previously unrecognised class of eicosanoids during coincubations of human umbilical vein endothelial cells and neutrophils, generated with aspirin but not by indomethacin, salicylate or dexamethasone, enhanced by interleukin-1-beta which induced cyclooxygenase-2 but not 15-lipoxygenase; four products proved to be 15R-epimers of lipoxins, two were potent inhibitors of leukotriene B4-mediated neutrophil adhesion to endothelium, with 15-epi-lipoxin A4 active in the nanomolar range, an example of a drug pirating endogenous biosynthetic mechanisms to trigger new mediators. Condition category: normal nutrient_topic: Aspirin research collection; topical membership is not evidence of a direct clinical effect, and aspirin is recorded separately from salicylate, the metabolite it becomes. plain_language: Aspirin, and not the other anti-inflammatories tested, makes the body build a mediator it otherwise never makes. organism: Human cells tissue_or_cell_type: Endothelium and neutrophils experimental_model: Coincubations of human umbilical vein endothelial cells and neutrophils with physical characterisation of the products limitations: The comparator set is what makes this strong: three other anti-inflammatory drugs including salicylate failed to produce the same products. It is a cell coincubation, and the nanomolar activity is measured on adhesion in vitro. exposure: Aspirin compared against indomethacin, salicylate and dexamethasone, with interleukin-1-beta induction and several costimuli evidence_span: {"source_cache": "artifacts/aspirin-research/7568157.abstract.txt", "locator": "Indexed abstract; zero-based, end-exclusive Unicode character offsets", "file_sha256": "d9e7b80265068fb60f67e97c9d46de7a25e0099151b6d7fbc688f70a29ee9b9b", "start_char": 0, "end_char": 2036, "text_sha256": "d9e7b80265068fb60f67e97c9d46de7a25e0099151b6d7fbc688f70a29ee9b9b"} [asa-p7568157] Aspirin triggers previously undescribed bioactive eicosanoids by human endothelial cell-leukocyte interactions. (1995). https://pubmed.ncbi.nlm.nih.gov/7568157/ DOI: 10.1073/pnas.92.21.9475
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.