Component

Betaine aldehyde

Betaine aldehyde. Species, exposure and limitations are retained in each linked claim.

4 recorded relationships. Experimental role, claim status and evidence remain attached to each record.

Read recorded mechanisms Open recursive mind map

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.

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.

Recorded relationships

What acts on it

  1. Purified recombinant human ALDH7A1 metabolized betaine aldehyde.

    Antiquitin / ALDH7A1 → Betaine aldehyde source_derived_draftungraded
    Experimental context and source evidence
    evidence_span
    {"source_cache": "artifacts/choline-research/20207735.abstract.txt", "locator": "Primary indexed abstract; zero-based, end-exclusive Unicode character offsets", "file_sha256": "510558afae2825079b269c8a4ee3f16114ab8d7f6c357c1a085ec14f1924e5e5", "start_char": 0, "end_char": 1582, "text_sha256": "510558afae2825079b269c8a4ee3f16114ab8d7f6c357c1a085ec14f1924e5e5"}
    experimental_model
    Purified recombinant human enzyme and CHO-cell expression
    exposure
    Betaine aldehyde substrate; increased extracellular sucrose or NaCl
    limitations
    ALDH7A1 accepts several aldehydes. Cell protection was not proved to be mediated exclusively by betaine or to predict benefit in pyridoxine-dependent epilepsy.
    nutrient_topic
    Choline research collection; topical membership is not evidence of a direct dietary effect. · Choline
    organism
    Human ALDH7A1; Chinese hamster ovary expression host
    plain_language
    The lysine-pathway enzyme already in the ledger also has activity on a choline-derived aldehyde.
    primary_references
    [choline-p20207735] Aldehyde dehydrogenase 7A1 (ALDH7A1) is a novel enzyme involved in cellular defense against hyperosmotic stress. (2010). https://pubmed.ncbi.nlm.nih.gov/20207735/ DOI: 10.1074/jbc.m109.077925
    tissue_or_cell_type
    Purified enzyme and osmotic-stress cell assays

    Choline: metabolism, signaling and nutrient connections (2026-09-17) · lines 633–644

    AI-assisted literature curation; primary study URLs and scope retained in the document and extraction. Not publisher full text. · supports · Purified recombinant human enzyme and CHO-cell expression · source_derived_draft · unverified_draft

    ### choline-aldh7-betaine Purified recombinant human ALDH7A1 metabolized betaine aldehyde. Condition category: normal nutrient_topic: Choline research collection; topical membership is not evidence of a direct dietary effect. plain_language: The lysine-pathway enzyme already in the ledger also has activity on a choline-derived aldehyde. organism: Human ALDH7A1; Chinese hamster ovary expression host tissue_or_cell_type: Purified enzyme and osmotic-stress cell assays experimental_model: Purified recombinant human enzyme and CHO-cell expression limitations: ALDH7A1 accepts several aldehydes. Cell protection was not proved to be mediated exclusively by betaine or to predict benefit in pyridoxine-dependent epilepsy. exposure: Betaine aldehyde substrate; increased extracellular sucrose or NaCl evidence_span: {"source_cache": "artifacts/choline-research/20207735.abstract.txt", "locator": "Primary indexed abstract; zero-based, end-exclusive Unicode character offsets", "file_sha256": "510558afae2825079b269c8a4ee3f16114ab8d7f6c357c1a085ec14f1924e5e5", "start_char": 0, "end_char": 1582, "text_sha256": "510558afae2825079b269c8a4ee3f16114ab8d7f6c357c1a085ec14f1924e5e5"} [choline-p20207735] Aldehyde dehydrogenase 7A1 (ALDH7A1) is a novel enzyme involved in cellular defense against hyperosmotic stress. (2010). https://pubmed.ncbi.nlm.nih.gov/20207735/ DOI: 10.1074/jbc.m109.077925
    Complete structured claim and evidence

  2. ALDH9/E3 betaine-aldehyde activity was highest in liver, adrenal and kidney among the tested tissues; mRNA peaked in different tissues.

    ALDH9A1 → Betaine aldehyde source_derived_draftungraded
    Experimental context and source evidence
    evidence_span
    {"source_cache": "artifacts/choline-research/9417993.abstract.txt", "locator": "Primary indexed abstract; zero-based, end-exclusive Unicode character offsets", "file_sha256": "67df6eb3c096ba09a314314ada97fc4c2b9ad555b28b316df3d17501b397c7d4", "start_char": 0, "end_char": 941, "text_sha256": "67df6eb3c096ba09a314314ada97fc4c2b9ad555b28b316df3d17501b397c7d4"}
    experimental_model
    Tissue enzyme activity, immunoblot and RNA comparison
    exposure
    Betaine-aldehyde activity compared with E3/ALDH9 protein and transcript
    limitations
    Transcript abundance differed from protein/activity distribution; RNA is not a universal proxy for flux.
    nutrient_topic
    Choline research collection; topical membership is not evidence of a direct dietary effect. · Choline
    organism
    Human
    plain_language
    The enzyme’s measured activity did not simply track its RNA abundance.
    primary_references
    [choline-p9417993] Tissue distribution of human aldehyde dehydrogenase E3 (ALDH9): comparison of enzyme activity with E3 protein and mRNA distribution. (1997). https://pubmed.ncbi.nlm.nih.gov/9417993/ DOI: 10.1016/s0305-0491(97)00022-9
    tissue_or_cell_type
    Multiple tissues including liver, adrenal, kidney and muscle

    Choline: metabolism, signaling and nutrient connections (2026-09-17) · lines 620–631

    AI-assisted literature curation; primary study URLs and scope retained in the document and extraction. Not publisher full text. · supports · Tissue enzyme activity, immunoblot and RNA comparison · source_derived_draft · unverified_draft

    ### choline-aldh9-activity-distribution ALDH9/E3 betaine-aldehyde activity was highest in liver, adrenal and kidney among the tested tissues; mRNA peaked in different tissues. Condition category: normal nutrient_topic: Choline research collection; topical membership is not evidence of a direct dietary effect. plain_language: The enzyme’s measured activity did not simply track its RNA abundance. organism: Human tissue_or_cell_type: Multiple tissues including liver, adrenal, kidney and muscle experimental_model: Tissue enzyme activity, immunoblot and RNA comparison limitations: Transcript abundance differed from protein/activity distribution; RNA is not a universal proxy for flux. exposure: Betaine-aldehyde activity compared with E3/ALDH9 protein and transcript evidence_span: {"source_cache": "artifacts/choline-research/9417993.abstract.txt", "locator": "Primary indexed abstract; zero-based, end-exclusive Unicode character offsets", "file_sha256": "67df6eb3c096ba09a314314ada97fc4c2b9ad555b28b316df3d17501b397c7d4", "start_char": 0, "end_char": 941, "text_sha256": "67df6eb3c096ba09a314314ada97fc4c2b9ad555b28b316df3d17501b397c7d4"} [choline-p9417993] Tissue distribution of human aldehyde dehydrogenase E3 (ALDH9): comparison of enzyme activity with E3 protein and mRNA distribution. (1997). https://pubmed.ncbi.nlm.nih.gov/9417993/ DOI: 10.1016/s0305-0491(97)00022-9
    Complete structured claim and evidence

  3. Purified human E3 aldehyde dehydrogenase showed betaine-aldehyde dehydrogenase activity, with the activities co-purifying across six columns.

    ALDH9A1 → Betaine aldehyde source_derived_draftungraded
    Experimental context and source evidence
    evidence_span
    {"source_cache": "artifacts/choline-research/7646513.abstract.txt", "locator": "Primary indexed abstract; zero-based, end-exclusive Unicode character offsets", "file_sha256": "26a654f5b886888ad8c9de61fc59a9fcbaa08dce54a8bd2ba4be43ac637071dc", "start_char": 0, "end_char": 687, "text_sha256": "26a654f5b886888ad8c9de61fc59a9fcbaa08dce54a8bd2ba4be43ac637071dc"}
    experimental_model
    Purified human E3 aldehyde dehydrogenase substrate assays
    exposure
    Betaine aldehyde and 4-aminobutyraldehyde activity across six chromatography steps
    limitations
    E3/ALDH9A1 has demonstrated betaine-aldehyde activity; not an exclusive assignment of every tissue’s betaine synthesis to this enzyme.
    nutrient_topic
    Choline research collection; topical membership is not evidence of a direct dietary effect. · Choline
    organism
    Human enzyme
    plain_language
    This enzyme can process the aldehyde intermediate in the betaine pathway.
    primary_references
    [choline-p7646513] Human aldehyde dehydrogenase E3 isozyme is a betaine aldehyde dehydrogenase. (1995). https://pubmed.ncbi.nlm.nih.gov/7646513/ DOI: 10.1006/bbrc.1995.2168
    tissue_or_cell_type
    Purified protein

    Choline: metabolism, signaling and nutrient connections (2026-09-17) · lines 607–618

    AI-assisted literature curation; primary study URLs and scope retained in the document and extraction. Not publisher full text. · supports · Purified human E3 aldehyde dehydrogenase substrate assays · source_derived_draft · unverified_draft

    ### choline-aldh9-betaine Purified human E3 aldehyde dehydrogenase showed betaine-aldehyde dehydrogenase activity, with the activities co-purifying across six columns. Condition category: normal nutrient_topic: Choline research collection; topical membership is not evidence of a direct dietary effect. plain_language: This enzyme can process the aldehyde intermediate in the betaine pathway. organism: Human enzyme tissue_or_cell_type: Purified protein experimental_model: Purified human E3 aldehyde dehydrogenase substrate assays limitations: E3/ALDH9A1 has demonstrated betaine-aldehyde activity; not an exclusive assignment of every tissue’s betaine synthesis to this enzyme. exposure: Betaine aldehyde and 4-aminobutyraldehyde activity across six chromatography steps evidence_span: {"source_cache": "artifacts/choline-research/7646513.abstract.txt", "locator": "Primary indexed abstract; zero-based, end-exclusive Unicode character offsets", "file_sha256": "26a654f5b886888ad8c9de61fc59a9fcbaa08dce54a8bd2ba4be43ac637071dc", "start_char": 0, "end_char": 687, "text_sha256": "26a654f5b886888ad8c9de61fc59a9fcbaa08dce54a8bd2ba4be43ac637071dc"} [choline-p7646513] Human aldehyde dehydrogenase E3 isozyme is a betaine aldehyde dehydrogenase. (1995). https://pubmed.ncbi.nlm.nih.gov/7646513/ DOI: 10.1006/bbrc.1995.2168
    Complete structured claim and evidence

  4. The pathway model identifies CHDH-mediated oxidation of choline to betaine aldehyde upstream of aldehyde-dehydrogenase-mediated betaine production.

    Human choline dehydrogenase / CHDH → Betaine aldehyde source_derived_draftungraded
    Experimental context and source evidence
    evidence_span
    {"source_cache": "artifacts/choline-research/39111307.fulltext.txt", "locator": "Primary full-text span; zero-based, end-exclusive Unicode character offsets", "file_sha256": "086a515ebf324a03baeb82e7fe21771eb7f819da09ef7a22372e06db25d3c571", "start_char": 3335, "end_char": 3656, "text_sha256": "580d72b54dac50ca5d1cfdb4e2ffe3719e957af76ac81d761422471424636d69"}
    experimental_model
    Slc25a48 knockout, rescue, mitochondrial assays and isotope tracing
    exposure
    Biochemical pathway described in the study introduction
    limitations
    Established pathway background in this carrier study, not a newly isolated human CHDH catalytic assay. No cofactor identity or exclusive downstream ALDH isoform is inferred.
    nutrient_topic
    Choline research collection; topical membership is not evidence of a direct dietary effect. · Choline
    organism
    Mammalian pathway background applied to the human-cell arm
    plain_language
    Choline oxidation has an aldehyde intermediate; it is not one undifferentiated jump to betaine.
    primary_references
    [choline-p39111307] SLC25A48 controls mitochondrial choline import and metabolism. (2024). https://pubmed.ncbi.nlm.nih.gov/39111307/ DOI: 10.1016/j.cmet.2024.07.010
    tissue_or_cell_type
    Mitochondrial choline metabolism

    Choline: metabolism, signaling and nutrient connections (2026-09-17) · lines 464–475

    AI-assisted literature curation; primary study URLs and scope retained in the document and extraction. Not publisher full text. · supports · Slc25a48 knockout, rescue, mitochondrial assays and isotope tracing · source_derived_draft · unverified_draft

    ### choline-chdh-aldehyde-step The pathway model identifies CHDH-mediated oxidation of choline to betaine aldehyde upstream of aldehyde-dehydrogenase-mediated betaine production. Condition category: normal nutrient_topic: Choline research collection; topical membership is not evidence of a direct dietary effect. plain_language: Choline oxidation has an aldehyde intermediate; it is not one undifferentiated jump to betaine. organism: Mammalian pathway background applied to the human-cell arm tissue_or_cell_type: Mitochondrial choline metabolism experimental_model: Slc25a48 knockout, rescue, mitochondrial assays and isotope tracing limitations: Established pathway background in this carrier study, not a newly isolated human CHDH catalytic assay. No cofactor identity or exclusive downstream ALDH isoform is inferred. exposure: Biochemical pathway described in the study introduction evidence_span: {"source_cache": "artifacts/choline-research/39111307.fulltext.txt", "locator": "Primary full-text span; zero-based, end-exclusive Unicode character offsets", "file_sha256": "086a515ebf324a03baeb82e7fe21771eb7f819da09ef7a22372e06db25d3c571", "start_char": 3335, "end_char": 3656, "text_sha256": "580d72b54dac50ca5d1cfdb4e2ffe3719e957af76ac81d761422471424636d69"} [choline-p39111307] SLC25A48 controls mitochondrial choline import and metabolism. (2024). https://pubmed.ncbi.nlm.nih.gov/39111307/ DOI: 10.1016/j.cmet.2024.07.010
    Complete structured claim and evidence

In the sources

Preserved passages that mention this component, quoted exactly. Open one to read it in context.

    This is a research prototype built from draft material. It is not medical advice, and its statements still await verification against the original studies.

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