Evidence map›Paper›PMID 41294874›Full record

ReviewCells2025

Valeric Acid: A Gut-Derived Metabolite as a Potential Epigenetic Modulator of Neuroinflammation in the Gut-Brain Axis.

Chiara Paciolla, Michele Manganelli, Mariagiovanna Di Chiano, Francesca Montenegro, Anna Gallone, Fabio Sallustio, Gabriella Guida

Abstract readReview
In one paragraph

Review in Cells, 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 24 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
24citing papers in PubMed, 1 pooled it
–field-weighted citation impact
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

24 citing papers in PubMed, 1 synthesis or guideline pooled it.

  1. Pooled it
  2. c-Jun N-Terminal Kinase-2 Mediates Alcohol and Corticosterone-Induced Tissue Injury at the Gut-Liver Axis.FASEB journal : official publication of the Federation of American Societies for Experimental Biology · 2026
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  9. ComparativeFoods (Basel, Switzerland) · 2026
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  20. Ultrasound-assisted extraction of total saponins fromCurrent research in food science · 2026
    Article
4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

7 authors.

Chiara PaciollaDepartment of Traslational Biomedicine and Neuroscience (DiBraiN), University of Bari Aldo Moro, 70121 Bari, Italy.ORCID 0009-0008-4276-6991
Michele ManganelliDepartment of Traslational Biomedicine and Neuroscience (DiBraiN), University of Bari Aldo Moro, 70121 Bari, Italy.ORCID 0000-0002-8219-0252
Mariagiovanna Di ChianoDepartment of Traslational Biomedicine and Neuroscience (DiBraiN), University of Bari Aldo Moro, 70121 Bari, Italy.ORCID 0000-0002-2058-9479
Francesca MontenegroDepartment of Precision and Regenerative Medicine and Ionian Area (DiMePRe-J), University of Bari Aldo Moro, 70121 Bari, Italy.ORCID 0000-0002-0857-7520
Anna GalloneDepartment of Traslational Biomedicine and Neuroscience (DiBraiN), University of Bari Aldo Moro, 70121 Bari, Italy.ORCID 0000-0002-2252-9584
Fabio SallustioDepartment of Precision and Regenerative Medicine and Ionian Area (DiMePRe-J), University of Bari Aldo Moro, 70121 Bari, Italy.ORCID 0000-0002-5132-6532
Gabriella GuidaDepartment of Traslational Biomedicine and Neuroscience (DiBraiN), University of Bari Aldo Moro, 70121 Bari, Italy.ORCID 0000-0003-2345-2838

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

The gut-brain axis (GBA) is a critical area of research for understanding the pathogenesis of neuroinflammatory and neurodegenerative diseases. Metabolites produced by the gut microbiota, particularly short-chain fatty acids (SCFAs), act as key mediators in this bidirectional communication. While the roles of acetate, propionate, and butyrate are well-established, valeric acid (VA), a five-carbon SCFA, is poorly understood. This comprehensive review explores VA as a gut-derived physiological epigenetic modulator, examining its microbial biosynthesis and systemic effects. This review discusses how VA acts as a selective histone deacetylase inhibitor (HDACi), particularly targeting Class I HDACs, to modulate gene expression and exert neuroprotective and anti-inflammatory effects. The analysis compares VA with its pharmacological analog, valproic acid (VPA), a well-known but non-selective HDACi. This comparison highlights how VA's physiological nature may offer a more targeted and safer intervention. In conclusion, elucidating VA's role as a microbiome-derived epigenetic regulator would open promising avenues for therapeutic strategies that directly connect gut and CNS health within the GBA.

Indexed as

BrainBrain-Gut AxisEpigenesis, GeneticGastrointestinal MicrobiomeNeuroinflammatory DiseasesPentanoic AcidsAnimalsHistone Deacetylase InhibitorsHumansHistone Deacetylase Inhibitorsn-pentanoic acidPentanoic AcidsHDACmicrobiotaneuroinflammationSCFAvaleric acid

Identifiers

PMID41294874
PMCPMC12650856

What OpenQuestion holds

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Registered trials

None linked

Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.