Component
Human free carnitine pools in organic acidemias
Context-specific entity; species, compartment and exposure are stated on each 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.
What acts on it
Four patients with propionic or methylmalonic aciduria had low plasma free carnitine and elevated short-chain acylcarnitine excretion; muscle carnitine was low in two biopsied patients.
Experimental context and source evidence
- availability_state
- nutrient_deficiency Imported condition classification; unverified.
- evidence_access
- Primary abstract
- experimental_model
- Two PA and two MMA cases; plasma, urine and selected muscle measurements.
- limitations
- Export-driven tissue depletion is the authors' mechanism; these inherited conditions are not synonymous with dietary B12 deficiency.
- nutrient_topic
- L-Carnitine collection; isomer, preparation, species, exposure and manipulation remain explicit. · L-Carnitine
- plain_language
- A metabolic block can tie up carnitine and lead to its loss in urine.
- primary_references
- Propionylcarnitine excretion in propionic and methylmalonic acidurias: a cause of carnitine deficiency. · 1984 · https://pubmed.ncbi.nlm.nih.gov/6723070/ · DOI 10.1016/0009-8981(84)90187-6
- trigger_kind
- nutrient_deficiency Imported condition classification; unverified.
L-Carnitine: synthesis, acyl-group transport, fuel selection and nutrient interactions (2026-09-19) · lines 258–264
AI-assisted research curation; primary-abstract references and experimental limitations individually identified. Not publisher full text. · supports · Two PA and two MMA cases; plasma, urine and selected muscle measurements. · source_derived_draft · unverified_draft
## l-carnitine-organic-acid-loss A metabolic block can tie up carnitine and lead to its loss in urine. Four patients with propionic or methylmalonic aciduria had low plasma free carnitine and elevated short-chain acylcarnitine excretion; muscle carnitine was low in two biopsied patients. Model: Two PA and two MMA cases; plasma, urine and selected muscle measurements. Limitations: Export-driven tissue depletion is the authors' mechanism; these inherited conditions are not synonymous with dietary B12 deficiency. Evidence access: Primary abstract Propionylcarnitine excretion in propionic and methylmalonic acidurias: a cause of carnitine deficiency. · 1984 · https://pubmed.ncbi.nlm.nih.gov/6723070/ · DOI 10.1016/0009-8981(84)90187-6
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.