Component

Core histone lysine acetylation

Core histone lysine acetylation. Identity is distinct from its gene and experimentally modified states; see each claim for organism and scope.

10 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.

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. Sulforaphane decreased acetylated histone H3, H4 and tubulin markers in the cell comparisons despite reduced HDAC protein levels.

    Experimental context and source evidence
    evidence_span
    {"source_cache": "artifacts/sulforaphane-research/25307283.abstract.txt", "locator": "Primary indexed abstract; zero-based, end-exclusive Unicode character offsets", "file_sha256": "cc736d6c2f2dc6c4026bdad0a5835d69ed094775076a2c1606f47020e6783331", "start_char": 0, "end_char": 1504, "text_sha256": "cc736d6c2f2dc6c4026bdad0a5835d69ed094775076a2c1606f47020e6783331"}
    experimental_model
    Matched cell-type and time-course comparison
    exposure
    Sulforaphane exposure; serum and time-course comparisons
    limitations
    Activity assays, protein abundance and substrate acetylation are distinct endpoints; mechanism of their divergence was not established. Erratum PMID 27271518 adds an omitted funding acknowledgment without revising these results.
    nutrient_topic
    Sulforaphane research collection; topical membership is not evidence of a direct dietary effect. · Sulforaphane / SFN, stereochemistry specified per study
    organism
    Human HaCaT keratinocytes and HCT116 colon cancer cells
    plain_language
    Less enzyme protein did not produce the expected increase in acetylation.
    primary_references
    [sulforaphane-p25307283] The effect of sulforaphane on histone deacetylase activity in keratinocytes: Differences between in vitro and in vivo analyses. (2015). https://pubmed.ncbi.nlm.nih.gov/25307283/ DOI: 10.1002/mc.22224
    tissue_or_cell_type
    HDAC activity, protein levels and target acetylation

    Sulforaphane: formation, electrophile sensing and nutrient connections (2026-09-17) · lines 606–617

    AI-assisted literature curation; primary study URLs and scope retained in the document and extraction. Not publisher full text. · supports · Matched cell-type and time-course comparison · source_derived_draft · unverified_draft

    ### sulforaphane-histone-acetylation-down Sulforaphane decreased acetylated histone H3, H4 and tubulin markers in the cell comparisons despite reduced HDAC protein levels. Condition category: normal nutrient_topic: Sulforaphane research collection; topical membership is not evidence of a direct dietary effect. plain_language: Less enzyme protein did not produce the expected increase in acetylation. organism: Human HaCaT keratinocytes and HCT116 colon cancer cells tissue_or_cell_type: HDAC activity, protein levels and target acetylation experimental_model: Matched cell-type and time-course comparison limitations: Activity assays, protein abundance and substrate acetylation are distinct endpoints; mechanism of their divergence was not established. Erratum PMID 27271518 adds an omitted funding acknowledgment without revising these results. exposure: Sulforaphane exposure; serum and time-course comparisons evidence_span: {"source_cache": "artifacts/sulforaphane-research/25307283.abstract.txt", "locator": "Primary indexed abstract; zero-based, end-exclusive Unicode character offsets", "file_sha256": "cc736d6c2f2dc6c4026bdad0a5835d69ed094775076a2c1606f47020e6783331", "start_char": 0, "end_char": 1504, "text_sha256": "cc736d6c2f2dc6c4026bdad0a5835d69ed094775076a2c1606f47020e6783331"} [sulforaphane-p25307283] The effect of sulforaphane on histone deacetylase activity in keratinocytes: Differences between in vitro and in vivo analyses. (2015). https://pubmed.ncbi.nlm.nih.gov/25307283/ DOI: 10.1002/mc.22224
    Complete structured claim and evidence
  2. Sulforaphane exposure increased acetylated histones in HEK293 and HCT116 experiments, including increased acetylated histones at the HCT116 P21 promoter.

    Experimental context and source evidence
    evidence_span
    {"source_cache": "artifacts/sulforaphane-research/15313918.abstract.txt", "locator": "Primary indexed abstract; zero-based, end-exclusive Unicode character offsets", "file_sha256": "9478957b1513e25cb47f13d6a1aca0df542fc851d8eb4b9c6394010e90dbe83e", "start_char": 0, "end_char": 1861, "text_sha256": "9478957b1513e25cb47f13d6a1aca0df542fc851d8eb4b9c6394010e90dbe83e"}
    experimental_model
    Cell exposure, enzyme assays, metabolites and chromatin immunoprecipitation
    exposure
    Parent SFN, SFN-GSH, SFN-Cys and SFN-NAC; GST inhibition
    limitations
    High-level HDAC activity was measured without establishing universal isoform inhibition; cell effects are not cancer-treatment outcomes.
    nutrient_topic
    Sulforaphane research collection; topical membership is not evidence of a direct dietary effect. · Sulforaphane / SFN, stereochemistry specified per study
    organism
    Human HEK293 and HCT116 cells
    plain_language
    The study measured a change to the chemical marks on DNA-packaging proteins.
    primary_references
    [sulforaphane-p15313918] A novel mechanism of chemoprotection by sulforaphane: inhibition of histone deacetylase. (2004). https://pubmed.ncbi.nlm.nih.gov/15313918/ DOI: 10.1158/0008-5472.can-04-1326
    tissue_or_cell_type
    Histone deacetylase activity and histone acetylation

    Sulforaphane: formation, electrophile sensing and nutrient connections (2026-09-17) · lines 593–604

    AI-assisted literature curation; primary study URLs and scope retained in the document and extraction. Not publisher full text. · supports · Cell exposure, enzyme assays, metabolites and chromatin immunoprecipitation · source_derived_draft · unverified_draft

    ### sulforaphane-histone-acetylation-up Sulforaphane exposure increased acetylated histones in HEK293 and HCT116 experiments, including increased acetylated histones at the HCT116 P21 promoter. Condition category: normal nutrient_topic: Sulforaphane research collection; topical membership is not evidence of a direct dietary effect. plain_language: The study measured a change to the chemical marks on DNA-packaging proteins. organism: Human HEK293 and HCT116 cells tissue_or_cell_type: Histone deacetylase activity and histone acetylation experimental_model: Cell exposure, enzyme assays, metabolites and chromatin immunoprecipitation limitations: High-level HDAC activity was measured without establishing universal isoform inhibition; cell effects are not cancer-treatment outcomes. exposure: Parent SFN, SFN-GSH, SFN-Cys and SFN-NAC; GST inhibition evidence_span: {"source_cache": "artifacts/sulforaphane-research/15313918.abstract.txt", "locator": "Primary indexed abstract; zero-based, end-exclusive Unicode character offsets", "file_sha256": "9478957b1513e25cb47f13d6a1aca0df542fc851d8eb4b9c6394010e90dbe83e", "start_char": 0, "end_char": 1861, "text_sha256": "9478957b1513e25cb47f13d6a1aca0df542fc851d8eb4b9c6394010e90dbe83e"} [sulforaphane-p15313918] A novel mechanism of chemoprotection by sulforaphane: inhibition of histone deacetylase. (2004). https://pubmed.ncbi.nlm.nih.gov/15313918/ DOI: 10.1158/0008-5472.can-04-1326
    Complete structured claim and evidence
  3. Exogenous acetate uptake is controlled by expression of both ACSS2 and the mitochondrial ACSS1, and the mitochondrial and lipogenic demand for two-carbon acetyl units considerably exceeds the uptake of exogenous acetate, leaving it to only sparingly contribute to histone acetylation.

    Experimental context and source evidence
    evidence_span
    {"source_cache": "artifacts/acetate-research/28099844.abstract.txt", "locator": "Indexed abstract; zero-based, end-exclusive Unicode character offsets", "file_sha256": "6df5e8ccde04ad8a222db774f6a8b1e8838ad6a1d918ff84b667d6dde57de188", "start_char": 0, "end_char": 1134, "text_sha256": "6df5e8ccde04ad8a222db774f6a8b1e8838ad6a1d918ff84b667d6dde57de188"}
    experimental_model
    Quantitative analysis of acetate metabolism in cultured cells under oxygen and serum limitation
    exposure
    Exogenous acetate with ACSS2 and ACSS1 manipulation under oxygen and serum limitation
    limitations
    The quantitative accounting here is the important part and it is a limiting result: demand for two-carbon units far exceeds what exogenous acetate supplies. Cultured cells at a given acetate concentration, which is not a fed human.
    nutrient_topic
    Acetic acid research collection; topical membership is not evidence of a direct clinical effect, and the ingested acid is recorded separately from the circulating acetate anion. · Acetic acid
    organism
    Cultured cells
    plain_language
    Acetate taken in from outside is mostly burned or built into fat; very little of it reaches the histones.
    primary_references
    [acetate-p28099844] Acetate Recapturing by Nuclear Acetyl-CoA Synthetase 2 Prevents Loss of Histone Acetylation during Oxygen and Serum Limitation. (2017). https://pubmed.ncbi.nlm.nih.gov/28099844/ DOI: 10.1016/j.celrep.2016.12.055
    tissue_or_cell_type
    Nucleus and cytosol

    Acetic acid: the ingested acid, the receptors acetate binds, the acetyl-CoA it becomes, and the acetyl groups that reach histones (2026-09-21) · lines 589–600

    AI-assisted literature curation; primary study URLs and scope retained in the document and extraction. Not publisher full text. · supports · Quantitative analysis of acetate metabolism in cultured cells under oxygen and serum limitation · source_derived_draft · unverified_draft

    ### acetate-exogenous-acetate-sparing Exogenous acetate uptake is controlled by expression of both ACSS2 and the mitochondrial ACSS1, and the mitochondrial and lipogenic demand for two-carbon acetyl units considerably exceeds the uptake of exogenous acetate, leaving it to only sparingly contribute to histone acetylation. Condition category: normal nutrient_topic: Acetic acid research collection; topical membership is not evidence of a direct clinical effect, and the ingested acid is recorded separately from the circulating acetate anion. plain_language: Acetate taken in from outside is mostly burned or built into fat; very little of it reaches the histones. organism: Cultured cells tissue_or_cell_type: Nucleus and cytosol experimental_model: Quantitative analysis of acetate metabolism in cultured cells under oxygen and serum limitation limitations: The quantitative accounting here is the important part and it is a limiting result: demand for two-carbon units far exceeds what exogenous acetate supplies. Cultured cells at a given acetate concentration, which is not a fed human. exposure: Exogenous acetate with ACSS2 and ACSS1 manipulation under oxygen and serum limitation evidence_span: {"source_cache": "artifacts/acetate-research/28099844.abstract.txt", "locator": "Indexed abstract; zero-based, end-exclusive Unicode character offsets", "file_sha256": "6df5e8ccde04ad8a222db774f6a8b1e8838ad6a1d918ff84b667d6dde57de188", "start_char": 0, "end_char": 1134, "text_sha256": "6df5e8ccde04ad8a222db774f6a8b1e8838ad6a1d918ff84b667d6dde57de188"} [acetate-p28099844] Acetate Recapturing by Nuclear Acetyl-CoA Synthetase 2 Prevents Loss of Histone Acetylation during Oxygen and Serum Limitation. (2017). https://pubmed.ncbi.nlm.nih.gov/28099844/ DOI: 10.1016/j.celrep.2016.12.055
    Complete structured claim and evidence
  4. Oxygen and serum limitation increased nuclear localisation of ACSS2, and nuclear ACSS2 recaptures acetate released from histone deacetylation for recycling by histone acetyltransferases, providing evidence for limited equilibration between nuclear and cytosolic acetyl-CoA and demonstrating that ACSS2 retains acetate to maintain histone acetylation.

    Experimental context and source evidence
    evidence_span
    {"source_cache": "artifacts/acetate-research/28099844.abstract.txt", "locator": "Indexed abstract; zero-based, end-exclusive Unicode character offsets", "file_sha256": "6df5e8ccde04ad8a222db774f6a8b1e8838ad6a1d918ff84b667d6dde57de188", "start_char": 0, "end_char": 1134, "text_sha256": "6df5e8ccde04ad8a222db774f6a8b1e8838ad6a1d918ff84b667d6dde57de188"}
    experimental_model
    Quantitative analysis of acetate metabolism in cultured cells under oxygen and serum limitation
    exposure
    Exogenous acetate with ACSS2 and ACSS1 manipulation under oxygen and serum limitation
    limitations
    The quantitative accounting here is the important part and it is a limiting result: demand for two-carbon units far exceeds what exogenous acetate supplies. Cultured cells at a given acetate concentration, which is not a fed human.
    nutrient_topic
    Acetic acid research collection; topical membership is not evidence of a direct clinical effect, and the ingested acid is recorded separately from the circulating acetate anion. · Acetic acid
    organism
    Cultured cells
    plain_language
    An enzyme sitting on the chromatin catches the acetate released when marks are removed, and puts it straight back.
    primary_references
    [acetate-p28099844] Acetate Recapturing by Nuclear Acetyl-CoA Synthetase 2 Prevents Loss of Histone Acetylation during Oxygen and Serum Limitation. (2017). https://pubmed.ncbi.nlm.nih.gov/28099844/ DOI: 10.1016/j.celrep.2016.12.055
    tissue_or_cell_type
    Nucleus and cytosol

    Acetic acid: the ingested acid, the receptors acetate binds, the acetyl-CoA it becomes, and the acetyl groups that reach histones (2026-09-21) · lines 602–613

    AI-assisted literature curation; primary study URLs and scope retained in the document and extraction. Not publisher full text. · supports · Quantitative analysis of acetate metabolism in cultured cells under oxygen and serum limitation · source_derived_draft · unverified_draft

    ### acetate-nuclear-acss2-recapture Oxygen and serum limitation increased nuclear localisation of ACSS2, and nuclear ACSS2 recaptures acetate released from histone deacetylation for recycling by histone acetyltransferases, providing evidence for limited equilibration between nuclear and cytosolic acetyl-CoA and demonstrating that ACSS2 retains acetate to maintain histone acetylation. Condition category: normal nutrient_topic: Acetic acid research collection; topical membership is not evidence of a direct clinical effect, and the ingested acid is recorded separately from the circulating acetate anion. plain_language: An enzyme sitting on the chromatin catches the acetate released when marks are removed, and puts it straight back. organism: Cultured cells tissue_or_cell_type: Nucleus and cytosol experimental_model: Quantitative analysis of acetate metabolism in cultured cells under oxygen and serum limitation limitations: The quantitative accounting here is the important part and it is a limiting result: demand for two-carbon units far exceeds what exogenous acetate supplies. Cultured cells at a given acetate concentration, which is not a fed human. exposure: Exogenous acetate with ACSS2 and ACSS1 manipulation under oxygen and serum limitation evidence_span: {"source_cache": "artifacts/acetate-research/28099844.abstract.txt", "locator": "Indexed abstract; zero-based, end-exclusive Unicode character offsets", "file_sha256": "6df5e8ccde04ad8a222db774f6a8b1e8838ad6a1d918ff84b667d6dde57de188", "start_char": 0, "end_char": 1134, "text_sha256": "6df5e8ccde04ad8a222db774f6a8b1e8838ad6a1d918ff84b667d6dde57de188"} [acetate-p28099844] Acetate Recapturing by Nuclear Acetyl-CoA Synthetase 2 Prevents Loss of Histone Acetylation during Oxygen and Serum Limitation. (2017). https://pubmed.ncbi.nlm.nih.gov/28099844/ DOI: 10.1016/j.celrep.2016.12.055
    Complete structured claim and evidence
  5. Extracellular acetate restored histone acetylation in ACLY-silenced HCT116 cells in a dose-dependent manner that required AceCS1, now named ACSS2.

    Acetate → Core histone lysine acetylation source_derived_draftungraded
    Experimental context and source evidence
    availability_state
    machinery_impairment Imported condition classification; unverified.
    cross_nutrient
    false
    evidence_location
    BioC text lines 11, 51; Fig. 2A–B
    experimental_model
    ACLY and/or AceCS1 siRNA with acetate supplementation
    exposure
    0, 1 or 5 mM acetate for 24 hours before lysis after siRNA treatment.
    limitations
    The authors identify this acetate supply as supraphysiologic; it is not a dietary recommendation and does not show rescue of an absent CoA pool. This experiment does not establish a dietary pantothenate threshold or benefit from B5 supplementation.
    nutrient_topic
    Pantothenic acid (vitamin B5) research collection; topical membership is not evidence of a direct dietary effect. · Pantothenate (vitamin B5)
    organism
    Homo sapiens
    plain_language
    A second acetyl-CoA-producing route could compensate when enough acetate was supplied.
    primary_references
    [b5-met-chromatin2009] ATP-citrate lyase links cellular metabolism to histone acetylation. (2009). https://pubmed.ncbi.nlm.nih.gov/19461003/ DOI: 10.1126/science.1164097
    tissue_or_cell_type
    HCT116 cells
    trigger_kind
    machinery_impairment Imported condition classification; unverified.

    Pantothenic acid (vitamin B5): coenzyme A, deficiency and nutrient interactions (2026-09-17) · lines 1005–1017

    AI-assisted literature curation; primary study URLs and scope retained in the document and extraction. Not publisher full text. · supports · ACLY and/or AceCS1 siRNA with acetate supplementation · source_derived_draft · unverified_draft

    ### b5-met-acetate-acss2-histone-rescue Extracellular acetate restored histone acetylation in ACLY-silenced HCT116 cells in a dose-dependent manner that required AceCS1, now named ACSS2. Condition category: machinery_impairment nutrient_topic: Pantothenic acid (vitamin B5) research collection; topical membership is not evidence of a direct dietary effect. plain_language: A second acetyl-CoA-producing route could compensate when enough acetate was supplied. organism: Homo sapiens tissue_or_cell_type: HCT116 cells experimental_model: ACLY and/or AceCS1 siRNA with acetate supplementation limitations: The authors identify this acetate supply as supraphysiologic; it is not a dietary recommendation and does not show rescue of an absent CoA pool. This experiment does not establish a dietary pantothenate threshold or benefit from B5 supplementation. exposure: 0, 1 or 5 mM acetate for 24 hours before lysis after siRNA treatment. cross_nutrient: false evidence_location: BioC text lines 11, 51; Fig. 2A–B [b5-met-chromatin2009] ATP-citrate lyase links cellular metabolism to histone acetylation. (2009). https://pubmed.ncbi.nlm.nih.gov/19461003/ DOI: 10.1126/science.1164097
    Complete structured claim and evidence
  6. ACLY silencing reduced acetylation of the core histones assayed in HCT116 cells.

    Experimental context and source evidence
    availability_state
    machinery_impairment Imported condition classification; unverified.
    cross_nutrient
    true
    evidence_location
    BioC text lines 11, 17, 51; Fig. 2A,E
    experimental_model
    ACLY siRNA versus control
    exposure
    72-hour siRNA treatment.
    limitations
    Tubulin acetylation was not comparably reduced. This is a source-specific cellular result, not a universal block of protein acetylation. This experiment does not establish a dietary pantothenate threshold or benefit from B5 supplementation.
    nutrient_topic
    Pantothenic acid (vitamin B5) research collection; topical membership is not evidence of a direct dietary effect. · Pantothenate (vitamin B5)
    organism
    Homo sapiens
    plain_language
    Histone acetylation depended partly on this source of acetyl-CoA in colon-cancer cells.
    primary_references
    [b5-met-chromatin2009] ATP-citrate lyase links cellular metabolism to histone acetylation. (2009). https://pubmed.ncbi.nlm.nih.gov/19461003/ DOI: 10.1126/science.1164097
    tissue_or_cell_type
    HCT116 cells and acid-extracted histones
    trigger_kind
    machinery_impairment Imported condition classification; unverified.

    Pantothenic acid (vitamin B5): coenzyme A, deficiency and nutrient interactions (2026-09-17) · lines 991–1003

    AI-assisted literature curation; primary study URLs and scope retained in the document and extraction. Not publisher full text. · supports · ACLY siRNA versus control · source_derived_draft · unverified_draft

    ### b5-met-acly-hct-histones ACLY silencing reduced acetylation of the core histones assayed in HCT116 cells. Condition category: machinery_impairment nutrient_topic: Pantothenic acid (vitamin B5) research collection; topical membership is not evidence of a direct dietary effect. plain_language: Histone acetylation depended partly on this source of acetyl-CoA in colon-cancer cells. organism: Homo sapiens tissue_or_cell_type: HCT116 cells and acid-extracted histones experimental_model: ACLY siRNA versus control limitations: Tubulin acetylation was not comparably reduced. This is a source-specific cellular result, not a universal block of protein acetylation. This experiment does not establish a dietary pantothenate threshold or benefit from B5 supplementation. exposure: 72-hour siRNA treatment. cross_nutrient: true evidence_location: BioC text lines 11, 17, 51; Fig. 2A,E [b5-met-chromatin2009] ATP-citrate lyase links cellular metabolism to histone acetylation. (2009). https://pubmed.ncbi.nlm.nih.gov/19461003/ DOI: 10.1126/science.1164097
    Complete structured claim and evidence
  7. Serum-induced histone acetylation in immortalized mouse embryonic fibroblasts depended on glucose availability and was prevented by Acly silencing.

    D-glucose → Core histone lysine acetylation source_derived_draftungraded
    Experimental context and source evidence
    cross_nutrient
    true
    evidence_location
    BioC text line 21; Fig. 3B–C
    experimental_model
    Serum stimulation with/without glucose and Acly siRNA
    exposure
    Experimental serum stimulation and glucose withdrawal; no selective pantothenate deprivation.
    limitations
    Glucose was the experimentally varied fuel. This is not evidence of B5 deficiency; cellular acetyl-CoA sources differ by context. This experiment does not establish a dietary pantothenate threshold or benefit from B5 supplementation.
    nutrient_topic
    Pantothenic acid (vitamin B5) research collection; topical membership is not evidence of a direct dietary effect. · Pantothenate (vitamin B5)
    organism
    Mus musculus
    plain_language
    Glucose supply affected histone acetylation through an acetyl-CoA-producing enzyme in this cell model.
    primary_references
    [b5-met-chromatin2009] ATP-citrate lyase links cellular metabolism to histone acetylation. (2009). https://pubmed.ncbi.nlm.nih.gov/19461003/ DOI: 10.1126/science.1164097
    tissue_or_cell_type
    Immortalized mouse embryonic fibroblasts

    Pantothenic acid (vitamin B5): coenzyme A, deficiency and nutrient interactions (2026-09-17) · lines 1019–1031

    AI-assisted literature curation; primary study URLs and scope retained in the document and extraction. Not publisher full text. · supports · Serum stimulation with/without glucose and Acly siRNA · source_derived_draft · unverified_draft

    ### b5-met-glucose-acly-histones Serum-induced histone acetylation in immortalized mouse embryonic fibroblasts depended on glucose availability and was prevented by Acly silencing. Condition category: normal nutrient_topic: Pantothenic acid (vitamin B5) research collection; topical membership is not evidence of a direct dietary effect. plain_language: Glucose supply affected histone acetylation through an acetyl-CoA-producing enzyme in this cell model. organism: Mus musculus tissue_or_cell_type: Immortalized mouse embryonic fibroblasts experimental_model: Serum stimulation with/without glucose and Acly siRNA limitations: Glucose was the experimentally varied fuel. This is not evidence of B5 deficiency; cellular acetyl-CoA sources differ by context. This experiment does not establish a dietary pantothenate threshold or benefit from B5 supplementation. exposure: Experimental serum stimulation and glucose withdrawal; no selective pantothenate deprivation. cross_nutrient: true evidence_location: BioC text line 21; Fig. 3B–C [b5-met-chromatin2009] ATP-citrate lyase links cellular metabolism to histone acetylation. (2009). https://pubmed.ncbi.nlm.nih.gov/19461003/ DOI: 10.1126/science.1164097
    Complete structured claim and evidence

Where it participates (unsigned role)

  1. In the colonic-cell experiments, butyrate metabolism supplied acetyl-CoA for energy metabolism and histone acetyltransferase activity.

    Butyrate → Acetyl-CoA source_derived_draftungraded
    Experimental context and source evidence
    evidence_access
    Primary abstract
    experimental_model
    Human colonic-cell metabolic experiments.
    limitations
    This is a multistep metabolic conversion; no single CoA ligase is assigned without direct evidence.
    nutrient_topic
    Butyrate collection; molecular form, preparation, species, exposure and manipulation remain explicit. · Butyrate
    plain_language
    The same carbon source supported both fuel use and adding acetyl marks.
    primary_references
    The Warburg effect dictates the mechanism of butyrate-mediated histone acetylation and cell proliferation. · 2012 · https://pubmed.ncbi.nlm.nih.gov/23063526/ · DOI 10.1016/j.molcel.2012.08.033

    Butyrate: microbial production, fuel use, signaling and nutrient interactions (2026-09-19) · lines 182–188

    AI-assisted research curation; primary-abstract references and experimental limitations individually identified. Not publisher full text. · supports · Human colonic-cell metabolic experiments. · source_derived_draft · unverified_draft

    ## butyrate-acetyl-coa The same carbon source supported both fuel use and adding acetyl marks. In the colonic-cell experiments, butyrate metabolism supplied acetyl-CoA for energy metabolism and histone acetyltransferase activity. Model: Human colonic-cell metabolic experiments. Limitations: This is a multistep metabolic conversion; no single CoA ligase is assigned without direct evidence. Evidence access: Primary abstract The Warburg effect dictates the mechanism of butyrate-mediated histone acetylation and cell proliferation. · 2012 · https://pubmed.ncbi.nlm.nih.gov/23063526/ · DOI 10.1016/j.molcel.2012.08.033
    Complete structured claim and evidence
  2. Butyrate increased histone H3 acetylation at Foxp3 regulatory regions under Treg-polarizing conditions and promoted Treg differentiation.

    Experimental context and source evidence
    evidence_access
    Primary abstract
    experimental_model
    Mouse naive T-cell differentiation, chromatin measurements and colitis experiments.
    limitations
    Not a claim that butyrate turns every T cell into a Treg or universally suppresses immunity. Correction record: Publisher correction reviewed: Figure 1d upper-right axis identifies Neuropilin-1-positive Foxp3-positive cells; the originally printed negative-marker label was wrong. The notice does not amend the Foxp3 histone-acetylation result cited here. https://www.nature.com/articles/nature13041
    nutrient_topic
    Butyrate collection; molecular form, preparation, species, exposure and manipulation remain explicit. · Butyrate
    plain_language
    The surrounding immune signals helped determine which gene program turned on.
    primary_references
    Commensal microbe-derived butyrate induces the differentiation of colonic regulatory T cells. · 2013 · https://pubmed.ncbi.nlm.nih.gov/24226770/ · DOI 10.1038/nature12721

    Butyrate: microbial production, fuel use, signaling and nutrient interactions (2026-09-19) · lines 334–340

    AI-assisted research curation; primary-abstract references and experimental limitations individually identified. Not publisher full text. · supports · Mouse naive T-cell differentiation, chromatin measurements and colitis experiments. · source_derived_draft · unverified_draft

    ## butyrate-foxp3-acetylation The surrounding immune signals helped determine which gene program turned on. Butyrate increased histone H3 acetylation at Foxp3 regulatory regions under Treg-polarizing conditions and promoted Treg differentiation. Model: Mouse naive T-cell differentiation, chromatin measurements and colitis experiments. Limitations: Not a claim that butyrate turns every T cell into a Treg or universally suppresses immunity. Correction record: Publisher correction reviewed: Figure 1d upper-right axis identifies Neuropilin-1-positive Foxp3-positive cells; the originally printed negative-marker label was wrong. The notice does not amend the Foxp3 histone-acetylation result cited here. https://www.nature.com/articles/nature13041 Evidence access: Primary abstract Commensal microbe-derived butyrate induces the differentiation of colonic regulatory T cells. · 2013 · https://pubmed.ncbi.nlm.nih.gov/24226770/ · DOI 10.1038/nature12721
    Complete structured claim and evidence
  3. Mutagenesis and RNA interference revealed that the putative monocarboxylic acid transporter Tarag was essential for enhancement of immunodeficiency pathway signalling by dietary acetate, and reduced expression of the histone acetyltransferase Tip60 decreased that signalling and blocked rescue by dietary acetate and by other sources of intracellular acetyl-CoA, while interference with histone deacetylation augmented transcription of ecdysone-regulated genes including pathway targets.

    Experimental context and source evidence
    evidence_span
    {"source_cache": "artifacts/acetate-research/34107298.abstract.txt", "locator": "Indexed abstract; zero-based, end-exclusive Unicode character offsets", "file_sha256": "4e5644412d174b2512ecf9cedea282b022d647b1b8a82f693a8f389da991425a", "start_char": 0, "end_char": 1179, "text_sha256": "4e5644412d174b2512ecf9cedea282b022d647b1b8a82f693a8f389da991425a"}
    experimental_model
    Drosophila mutagenesis and RNA interference in enteroendocrine cells of the anterior midgut
    exposure
    Dietary acetate with disruption of a monocarboxylic acid transporter, of histone deacetylation, and of the Tip60 acetyltransferase
    limitations
    This is a fly study. The mammalian relevance is the authors’ statement that the Tip60-steroid hormone axis is conserved, not a mammalian measurement.
    nutrient_topic
    Acetic acid research collection; topical membership is not evidence of a direct clinical effect, and the ingested acid is recorded separately from the circulating acetate anion. · Acetic acid
    organism
    Drosophila
    plain_language
    Acetate has to be carried inside the cell and turned into a chromatin mark; it is not read at the cell surface.
    primary_references
    [acetate-p34107298] Microbiota-derived acetate activates intestinal innate immunity via the Tip60 histone acetyltransferase complex. (2021). https://pubmed.ncbi.nlm.nih.gov/34107298/ DOI: 10.1016/j.immuni.2021.05.017
    tissue_or_cell_type
    Anterior midgut
    transport_effect
    raises The transporter was required for dietary acetate to reach the intracellular acetyl-CoA route.
    transport_pool
    the intracellular acetate pool The transporter was required for dietary acetate to reach the intracellular acetyl-CoA route.

    Acetic acid: the ingested acid, the receptors acetate binds, the acetyl-CoA it becomes, and the acetyl groups that reach histones (2026-09-21) · lines 693–704

    AI-assisted literature curation; primary study URLs and scope retained in the document and extraction. Not publisher full text. · supports · Drosophila mutagenesis and RNA interference in enteroendocrine cells of the anterior midgut · source_derived_draft · unverified_draft

    ### acetate-acetate-must-enter Mutagenesis and RNA interference revealed that the putative monocarboxylic acid transporter Tarag was essential for enhancement of immunodeficiency pathway signalling by dietary acetate, and reduced expression of the histone acetyltransferase Tip60 decreased that signalling and blocked rescue by dietary acetate and by other sources of intracellular acetyl-CoA, while interference with histone deacetylation augmented transcription of ecdysone-regulated genes including pathway targets. Condition category: normal nutrient_topic: Acetic acid research collection; topical membership is not evidence of a direct clinical effect, and the ingested acid is recorded separately from the circulating acetate anion. plain_language: Acetate has to be carried inside the cell and turned into a chromatin mark; it is not read at the cell surface. organism: Drosophila tissue_or_cell_type: Anterior midgut experimental_model: Drosophila mutagenesis and RNA interference in enteroendocrine cells of the anterior midgut limitations: This is a fly study. The mammalian relevance is the authors’ statement that the Tip60-steroid hormone axis is conserved, not a mammalian measurement. exposure: Dietary acetate with disruption of a monocarboxylic acid transporter, of histone deacetylation, and of the Tip60 acetyltransferase evidence_span: {"source_cache": "artifacts/acetate-research/34107298.abstract.txt", "locator": "Indexed abstract; zero-based, end-exclusive Unicode character offsets", "file_sha256": "4e5644412d174b2512ecf9cedea282b022d647b1b8a82f693a8f389da991425a", "start_char": 0, "end_char": 1179, "text_sha256": "4e5644412d174b2512ecf9cedea282b022d647b1b8a82f693a8f389da991425a"} [acetate-p34107298] Microbiota-derived acetate activates intestinal innate immunity via the Tip60 histone acetyltransferase complex. (2021). https://pubmed.ncbi.nlm.nih.gov/34107298/ DOI: 10.1016/j.immuni.2021.05.017
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    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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