Component
Mouse quinolinate phosphoribosyltransferase / Qprt
Context-specific entity; species, compartment and exposure are stated on each 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 it acts on
Qprt-heterozygous mice had higher quinolinate, lower NAD and greater acute kidney injury susceptibility.
Experimental context and source evidence
- availability_state
- machinery_impairment Imported condition classification; unverified.
- evidence_access
- Primary abstract
- experimental_model
- Mouse Qprt heterozygous deletion.
- limitations
- No inference that more tryptophan fixes the blocked step.
- nutrient_topic
- Tryptophan collection; molecular form, preparation, species, exposure and manipulation remain explicit. · L-Tryptophan
- plain_language
- Less conversion machinery increased vulnerability despite accumulated precursor.
- primary_references
- De novo NAD+ biosynthetic impairment in acute kidney injury in humans. · 2018 · https://pubmed.ncbi.nlm.nih.gov/30127395/ · DOI 10.1038/s41591-018-0138-z
- trigger_kind
- machinery_impairment Imported condition classification; unverified.
Tryptophan: transport, protein synthesis, neuroactive metabolites, NAD and microbial pathways (2026-09-19) · lines 250–256
AI-assisted research curation; primary-abstract references and experimental limitations individually identified. Not publisher full text. · supports · Mouse Qprt heterozygous deletion. · source_derived_draft · unverified_draft
## tryptophan-qprt-dosage Less conversion machinery increased vulnerability despite accumulated precursor. Qprt-heterozygous mice had higher quinolinate, lower NAD and greater acute kidney injury susceptibility. Model: Mouse Qprt heterozygous deletion. Limitations: No inference that more tryptophan fixes the blocked step. Evidence access: Primary abstract De novo NAD+ biosynthetic impairment in acute kidney injury in humans. · 2018 · https://pubmed.ncbi.nlm.nih.gov/30127395/ · DOI 10.1038/s41591-018-0138-z
Complete structured claim and evidenceMouse acute kidney injury reduced renal QPRT and NAD while quinolinate accumulated.
Experimental context and source evidence
- availability_state
- machinery_impairment Imported condition classification; unverified.
- evidence_access
- Primary abstract
- experimental_model
- Mouse acute kidney injury measurements.
- limitations
- Co-occurrence alone is not the complete causal test; Qprt dosage manipulation is recorded separately.
- nutrient_topic
- Tryptophan collection; molecular form, preparation, species, exposure and manipulation remain explicit. · L-Tryptophan
- plain_language
- An upstream metabolite can rise while the useful downstream product falls.
- primary_references
- De novo NAD+ biosynthetic impairment in acute kidney injury in humans. · 2018 · https://pubmed.ncbi.nlm.nih.gov/30127395/ · DOI 10.1038/s41591-018-0138-z
- trigger_kind
- machinery_impairment Imported condition classification; unverified.
Tryptophan: transport, protein synthesis, neuroactive metabolites, NAD and microbial pathways (2026-09-19) · lines 242–248
AI-assisted research curation; primary-abstract references and experimental limitations individually identified. Not publisher full text. · supports · Mouse acute kidney injury measurements. · source_derived_draft · unverified_draft
## tryptophan-qprt-injury An upstream metabolite can rise while the useful downstream product falls. Mouse acute kidney injury reduced renal QPRT and NAD while quinolinate accumulated. Model: Mouse acute kidney injury measurements. Limitations: Co-occurrence alone is not the complete causal test; Qprt dosage manipulation is recorded separately. Evidence access: Primary abstract De novo NAD+ biosynthetic impairment in acute kidney injury in humans. · 2018 · https://pubmed.ncbi.nlm.nih.gov/30127395/ · DOI 10.1038/s41591-018-0138-z
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.