Component
Rheumatoid arthritis disease activity
Independently recorded entity or measured process. Linked claims specify compartment, assay and experimental scope.
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 it acts on
RA patients had lower plasma PLP than controls but no significant difference in erythrocyte PLP, AST activation coefficient or urinary 4-pyridoxic acid.
Experimental context and source evidence
- availability_state
- biomarker_context Imported condition classification; unverified.
- experimental_model
- Human cross-sectional comparison: 33 RA patients, 17 healthy controls; separate pair-fed rat adjuvant-arthritis experiment.
- exposure
- Human observational samples; rats studied at peak day 21 and chronic day 42 inflammation. Human arm shares recruitment program with supplementation study.
- limitations
- Cross-sectional association; disease, treatment and nutrition are not fully separable. Shared recruitment with related 2005 trial.
- nutrient_topic
- Vitamin B6 research collection; topical membership is not evidence of a direct dietary effect. · Vitamin B6
- organism
- Homo sapiens
- plain_language
- A low blood-plasma result did not mean that every measured B6 compartment was low.
- primary_references
- [b6-chiang2005-inflammation] Inflammation causes tissue-specific depletion of vitamin B6 (2005). https://pubmed.ncbi.nlm.nih.gov/16277678/ DOI: 10.1186/ar1821
- tissue_or_cell_type
- Human blood and whole-body measurements
- trigger_kind
- biomarker_context Imported condition classification; unverified.
Vitamin B6: mechanisms, deficiency and nutrient interactions (2026-09-17) · lines 1523–1533
AI-assisted literature curation; primary study URLs and scope retained in the document and extraction. Not publisher full text. · supports · Human cross-sectional comparison: 33 RA patients, 17 healthy controls; separate pair-fed rat adjuvant-arthritis experiment. · source_derived_draft · unverified_draft
### b6-ra-plasma-redcell-divergence RA patients had lower plasma PLP than controls but no significant difference in erythrocyte PLP, AST activation coefficient or urinary 4-pyridoxic acid. Condition category: biomarker_context nutrient_topic: Vitamin B6 research collection; topical membership is not evidence of a direct dietary effect. plain_language: A low blood-plasma result did not mean that every measured B6 compartment was low. organism: Homo sapiens tissue_or_cell_type: Human blood and whole-body measurements experimental_model: Human cross-sectional comparison: 33 RA patients, 17 healthy controls; separate pair-fed rat adjuvant-arthritis experiment. limitations: Cross-sectional association; disease, treatment and nutrition are not fully separable. Shared recruitment with related 2005 trial. exposure: Human observational samples; rats studied at peak day 21 and chronic day 42 inflammation. Human arm shares recruitment program with supplementation study. [b6-chiang2005-inflammation] Inflammation causes tissue-specific depletion of vitamin B6 (2005). https://pubmed.ncbi.nlm.nih.gov/16277678/ DOI: 10.1186/ar1821
Complete structured claim and evidenceDuring TNF-inhibitor therapy, disease-activity changes correlated with PLP and HK: XA changes; good responders showed a 31% PLP increase.
Experimental context and source evidence
- availability_state
- biomarker_context Imported condition classification; unverified.
- experimental_model
- Longitudinal 106 RA patients beginning TNF-inhibitor therapy, assessed at baseline and three months.
- exposure
- Clinical TNF inhibitors; not randomized B6 supplementation.
- limitations
- Observational treatment-response association; cannot show B6 caused improvement. The 11% HK: XA decrease in good responders was not statistically significant (P=0.1).
- nutrient_topic
- Vitamin B6 research collection; topical membership is not evidence of a direct dietary effect. · Vitamin B6
- organism
- Homo sapiens
- plain_language
- B6 markers changed while inflammation was being treated, without a B6 intervention.
- primary_references
- [b6-sande2019] Vitamin B-6 Status Correlates with Disease Activity in Rheumatoid Arthritis Patients During Treatment with TNFα Inhibitors (2019). https://pubmed.ncbi.nlm.nih.gov/31050750/ DOI: 10.1093/jn/nxz001
- tissue_or_cell_type
- Human blood and whole-body measurements
- trigger_kind
- biomarker_context Imported condition classification; unverified.
Vitamin B6: mechanisms, deficiency and nutrient interactions (2026-09-17) · lines 1547–1557
AI-assisted literature curation; primary study URLs and scope retained in the document and extraction. Not publisher full text. · supports · Longitudinal 106 RA patients beginning TNF-inhibitor therapy, assessed at baseline and three months. · source_derived_draft · unverified_draft
### b6-tnf-treatment-marker-change During TNF-inhibitor therapy, disease-activity changes correlated with PLP and HK: XA changes; good responders showed a 31% PLP increase. Condition category: biomarker_context nutrient_topic: Vitamin B6 research collection; topical membership is not evidence of a direct dietary effect. plain_language: B6 markers changed while inflammation was being treated, without a B6 intervention. organism: Homo sapiens tissue_or_cell_type: Human blood and whole-body measurements experimental_model: Longitudinal 106 RA patients beginning TNF-inhibitor therapy, assessed at baseline and three months. limitations: Observational treatment-response association; cannot show B6 caused improvement. The 11% HK: XA decrease in good responders was not statistically significant (P=0.1). exposure: Clinical TNF inhibitors; not randomized B6 supplementation. [b6-sande2019] Vitamin B-6 Status Correlates with Disease Activity in Rheumatoid Arthritis Patients During Treatment with TNFα Inhibitors (2019). https://pubmed.ncbi.nlm.nih.gov/31050750/ DOI: 10.1093/jn/nxz001
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.