Evidence map›Paper›PMID 33447046›Full record

ArticleInternational journal of tryptophan research : IJTR2020

Sodium Butyrate and Indole-3-propionic Acid Prevent the Increase of Cytokines and Kynurenine Levels in LPS-induced Human Primary Astrocytes.

Michelle L Garcez, Vanessa X Tan, Benjamin Heng, Gilles J Guillemin

Abstract read
In one paragraph

Article in International journal of tryptophan research : IJTR, 2020. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 33 papers.

0numbers the graph read from it
0cells of the map it votes in
33citing papers in PubMed
–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

33 citing papers in PubMed.

  1. Article
  2. Review
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  5. Article
  6. Review
  7. Review
  8. Article
  9. Indole-3-propionic acid promotes Schwann cell proliferation following peripheral nerve injury by activating the PI3K/AKT pathway.Neurotherapeutics : the journal of the American Society for Experimental NeuroTherapeutics · 2025
    Article
  10. Review
  11. Article
  12. Article
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  15. Article
  16. Article
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  18. Article
  19. The Human Microbiome-A Physiologic Perspective.Comprehensive Physiology · 2024
    Review
  20. 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

4 authors.

Michelle L GarcezNeurochemistry Laboratory, Department of Biochemistry, Federal University of Santa Catarina (UFSC), Florianópolis, SC, Brazil.ORCID https://orcid.org/0000-0003-4333-5241
Vanessa X TanNeurodegenerative diseases Research Group, Faculty of Medicine, Health and Human Sciences, Department of Biomedical Sciences, Macquarie University, Sydney, NSW, Australia.
Benjamin HengNeurodegenerative diseases Research Group, Faculty of Medicine, Health and Human Sciences, Department of Biomedical Sciences, Macquarie University, Sydney, NSW, Australia.ORCID https://orcid.org/0000-0002-0247-2920
Gilles J GuilleminNeurodegenerative diseases Research Group, Faculty of Medicine, Health and Human Sciences, Department of Biomedical Sciences, Macquarie University, Sydney, NSW, Australia.ORCID https://orcid.org/0000-0001-8105-4470

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

The crosstalk between central nervous system (CNS) and gut microbiota plays key roles in neuroinflammation and chronic immune activation that are common features of all neurodegenerative diseases. Imbalance in the microbiota can lead to an increase in the intestinal permeability allowing toxins to diffuse and reach the CNS, as well as impairing the production of neuroprotective metabolites such as sodium butyrate (SB) and indole-3-propionic acid (IPA). The aim of the present study was to evaluate the effect of SB and IPA on LPS-induced production of cytokines and tryptophan metabolites in human astrocytes. Primary cultures of human astrocytes were pre-incubated with SB or IPA for 1 hour before treatment with LPS. Cell viability was not affected at 24, 48 or 72 hours after pre-treatment with SB, IPA or LPS treatment. SB was able to significantly prevent the increase of GM-CSF, MCP-1, IL-6 IL-12, and IL-13 triggered by LPS. SB and IPA also prevented inflammation indicated by the increase in kynurenine and kynurenine/tryptophan ratio induced by LPS treatment. IPA pre-treatment prevented the LPS-induced increase in MCP-1, IL-12, IL-13, and TNF-α levels 24 hours after pre-treatment, but had no effect on tryptophan metabolites. The present study showed for the first time that bacterial metabolites SB and IPA have potential anti-inflammatory effect on primary human astrocytes with potential therapeutic benefit in neurodegenerative disease characterized by the presence of chronic low-grade inflammation.

Indexed as

cytokinesinflammationkynurenine pathwayNeurodegenerative diseases

Identifiers

PMID33447046
PMCPMC7780186

What OpenQuestion holds

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Registered trials

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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.