Component
HepG2 3-hydroxyisovalerylcarnitine pool
HepG2 3-hydroxyisovalerylcarnitine pool. 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
Biotin-deficient but carnitine-sufficient HepG2 cells had more than tenfold higher intracellular 3-hydroxyisovalerylcarnitine than doubly sufficient cells.
Experimental context and source evidence
- availability_state
- nutrient_deficiency Imported condition classification; unverified.
- evidence_span
- {"source_cache": "artifacts/biotin-research/25527659.abstract.txt", "locator": "Exact primary indexed abstract; zero-based, end-exclusive Unicode character offsets", "file_sha256": "4a368eb2fa2020bb1cabc99b31a3420870a8256886d5934d3d834c90b078238f", "start_char": 0, "end_char": 2372, "text_sha256": "4a368eb2fa2020bb1cabc99b31a3420870a8256886d5934d3d834c90b078238f"}
- experimental_model
- Two-factor biotin/carnitine depletion and carnitine repletion in human HepG2 cells
- exposure
- Separate and combined biotin and carnitine depletion
- limitations
- This is a cell-culture demonstration of marker masking; it does not validate a diagnostic correction formula in pregnancy or the general population.
- nutrient_topic
- Biotin research collection; topical membership is not evidence of a direct dietary effect. · Biotin
- organism
- Homo sapiens
- plain_language
- When carnitine is available, the biotin-related bottleneck produces a strong side-product signal.
- primary_references
- [b7-p25527659] In HepG2 cells, coexisting carnitine deficiency masks important indicators of marginal biotin deficiency. (2015). https://pubmed.ncbi.nlm.nih.gov/25527659/ DOI: 10.3945/jn.114.201343
- tissue_or_cell_type
- HepG2 hepatoma cells
- trigger_kind
- nutrient_deficiency Imported condition classification; unverified.
Biotin: carboxylases, recycling, deficiency and nutrient interactions (2026-09-17) · lines 949–960
AI-assisted literature curation; primary study URLs and scope retained in the document and extraction. Not publisher full text. · supports · Two-factor biotin/carnitine depletion and carnitine repletion in human HepG2 cells · source_derived_draft · unverified_draft
### b7-c5oh-biotin-low Biotin-deficient but carnitine-sufficient HepG2 cells had more than tenfold higher intracellular 3-hydroxyisovalerylcarnitine than doubly sufficient cells. Condition category: nutrient_deficiency nutrient_topic: Biotin research collection; topical membership is not evidence of a direct dietary effect. plain_language: When carnitine is available, the biotin-related bottleneck produces a strong side-product signal. organism: Homo sapiens tissue_or_cell_type: HepG2 hepatoma cells experimental_model: Two-factor biotin/carnitine depletion and carnitine repletion in human HepG2 cells limitations: This is a cell-culture demonstration of marker masking; it does not validate a diagnostic correction formula in pregnancy or the general population. exposure: Separate and combined biotin and carnitine depletion evidence_span: {"source_cache": "artifacts/biotin-research/25527659.abstract.txt", "locator": "Exact primary indexed abstract; zero-based, end-exclusive Unicode character offsets", "file_sha256": "4a368eb2fa2020bb1cabc99b31a3420870a8256886d5934d3d834c90b078238f", "start_char": 0, "end_char": 2372, "text_sha256": "4a368eb2fa2020bb1cabc99b31a3420870a8256886d5934d3d834c90b078238f"} [b7-p25527659] In HepG2 cells, coexisting carnitine deficiency masks important indicators of marginal biotin deficiency. (2015). https://pubmed.ncbi.nlm.nih.gov/25527659/ DOI: 10.3945/jn.114.201343
Complete structured claim and evidenceCombined biotin and carnitine deficiency largely masked the increase in substrate-derived acylcarnitines observed with isolated biotin deficiency in HepG2 cells.
Experimental context and source evidence
- availability_state
- nutrient_deficiency Imported condition classification; unverified.
- evidence_span
- {"source_cache": "artifacts/biotin-research/25527659.abstract.txt", "locator": "Exact primary indexed abstract; zero-based, end-exclusive Unicode character offsets", "file_sha256": "4a368eb2fa2020bb1cabc99b31a3420870a8256886d5934d3d834c90b078238f", "start_char": 0, "end_char": 2372, "text_sha256": "4a368eb2fa2020bb1cabc99b31a3420870a8256886d5934d3d834c90b078238f"}
- experimental_model
- Two-factor biotin/carnitine depletion and carnitine repletion in human HepG2 cells
- exposure
- Separate and combined biotin and carnitine depletion
- limitations
- This is a cell-culture demonstration of marker masking; it does not validate a diagnostic correction formula in pregnancy or the general population.
- nutrient_topic
- Biotin research collection; topical membership is not evidence of a direct dietary effect. · Biotin
- organism
- Homo sapiens
- plain_language
- A second shortage can hide the laboratory signature of the first.
- primary_references
- [b7-p25527659] In HepG2 cells, coexisting carnitine deficiency masks important indicators of marginal biotin deficiency. (2015). https://pubmed.ncbi.nlm.nih.gov/25527659/ DOI: 10.3945/jn.114.201343
- tissue_or_cell_type
- HepG2 hepatoma cells
- trigger_kind
- nutrient_deficiency Imported condition classification; unverified.
Biotin: carboxylases, recycling, deficiency and nutrient interactions (2026-09-17) · lines 962–973
AI-assisted literature curation; primary study URLs and scope retained in the document and extraction. Not publisher full text. · supports · Two-factor biotin/carnitine depletion and carnitine repletion in human HepG2 cells · source_derived_draft · unverified_draft
### b7-carnitine-hides-c5oh Combined biotin and carnitine deficiency largely masked the increase in substrate-derived acylcarnitines observed with isolated biotin deficiency in HepG2 cells. Condition category: nutrient_deficiency nutrient_topic: Biotin research collection; topical membership is not evidence of a direct dietary effect. plain_language: A second shortage can hide the laboratory signature of the first. organism: Homo sapiens tissue_or_cell_type: HepG2 hepatoma cells experimental_model: Two-factor biotin/carnitine depletion and carnitine repletion in human HepG2 cells limitations: This is a cell-culture demonstration of marker masking; it does not validate a diagnostic correction formula in pregnancy or the general population. exposure: Separate and combined biotin and carnitine depletion evidence_span: {"source_cache": "artifacts/biotin-research/25527659.abstract.txt", "locator": "Exact primary indexed abstract; zero-based, end-exclusive Unicode character offsets", "file_sha256": "4a368eb2fa2020bb1cabc99b31a3420870a8256886d5934d3d834c90b078238f", "start_char": 0, "end_char": 2372, "text_sha256": "4a368eb2fa2020bb1cabc99b31a3420870a8256886d5934d3d834c90b078238f"} [b7-p25527659] In HepG2 cells, coexisting carnitine deficiency masks important indicators of marginal biotin deficiency. (2015). https://pubmed.ncbi.nlm.nih.gov/25527659/ DOI: 10.3945/jn.114.201343
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.