Cited by 6Neuroscience and Neuropharmacology ResearchGut microbiota and healthTryptophan and brain disorders

Gut Microbiota Metabolites Differentially Release Gliotransmitters from the Cultured Human Astrocytes: A Preliminary Report

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Karbownik, Michał Seweryn, Sokołowska, Paulina, Kowalczyk, Edward·2023·International Journal of Molecular Sciences

Abstract

Butyrate and indole-3-propionic acid represent the CNS-available gut microbiota metabolites exhibiting potentially beneficial effects on human brain function and being tested as antidepressants. Astrocytes represent one of the putative targets for the gut metabolites; however, the mechanism of action of butyrate and indole-3-propionic acid is not well understood. In order to test this mechanism, a human astrocyte cell-line culture was treated with the compounds or without them, and the supernatants were collected for the analysis of ATP and glutamate gliotransmitter release with the use of luminescent and fluorescent methods, respectively. A 10-min incubation of astrocytes with 1–5 mM butyrate increased the ATP gliotransmitter release by 78% (95%CI: 45–119%), p < 0.001. The effect was found to be mediated by the cytosolic Ca2+ mobilization. Both 10-min and 24-h treatments with indole-3-propionic acid produced no significant effects on the release of gliotransmitters. The results for glutamate release were inconclusive due to a specific glutamate release pattern discovered in the tested model. This preliminary report of butyrate-induced ATP gliotransmitter release appears to provide a novel mechanistic explanation for the beneficial effect of this gut microbiota metabolite on brain function; however, the results require further evaluation in more composed models.

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  • Butyrate stimulates adenosine triphosphate release from astrocytes in a cytosolic Ca2+-dependent manner.

    “A recent in vitro study has found that butyrate stimulated adenosine triphosphate release from astrocytes in a cytosolic Ca2+-dependent manner, suggesting a potential neuroprotective mechanism worth further exploration.251”

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Authors
Karbownik, M. S., Sokołowska, P., & Kowalczyk, E.
Affiliations
Medical University of Lodz (PL)
Corresponding author
Karbownik, Michał Seweryn
Venue
International Journal of Molecular Sciences
Publisher
MDPI AG
Published
2023-04-01
Volume
24
Issue
7
Pages
6617
ISSN
1422-0067 (ISSN-L)
OpenAlex
W4362589214
Cited by
6
References
63
Citations by year
2026: 2 · 2025: 2 · 2024: 1 · 2023: 1
FWCI
0.73
Type
journal article
Language
en
Open access
Locations
  • International Journal of Molecular Sciences (publishedVersion, cc-by)
  • PubMed Central (publishedVersion, cc-by)
  • PubMed (publishedVersion)
Funders
  • National Science Center of Poland (2021/05/X/NZ3/00557, 503/5-108-03/503-51-001-19-00)
  • Medical University of Lodz (2021/05/X/NZ3/00557, 503/5-108-03/503-51-001-19-00)
Topics
  • Life Sciences › Neuroscience › Cellular and Molecular Neuroscience › Neuroscience and Neuropharmacology Research
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Gut microbiota and health
  • Life Sciences › Neuroscience › Biological Psychiatry › Tryptophan and brain disorders
Keywords
gut microbiota metabolites, butyrate, indole-3-propionic acid, astrocytes, gliotransmitters, ATP release, glutamate release, calcium mobilization, gut-brain axis, antidepressants
MeSH terms
Gastrointestinal Microbiome, Adenosine Triphosphate, Astrocytes, Humans, Propionates, Glutamic Acid

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