Cited by 10Neurotransmitter Receptor Influence on BehaviorGut microbiota and healthNicotinic Acetylcholine Receptors Study

Impact of the gut microbiome on nicotine’s motivational effects and glial cells in the ventral tegmental area in male mice

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Lakosa, Alina, Rahimian, Anaïs, Tomasi, Flavio, Marti, Fabio, Reynolds, Lauren M., Tochon, Léa, David, Vincent, Danckaert, Anne +6 more·2023·Neuropsychopharmacology

Abstract

A link between gut dysbiosis and the pathogenesis of brain disorders has been identified. A role for gut bacteria in drug reward and addiction has been suggested but very few studies have investigated their impact on brain and behavioral responses to addictive drugs so far. In particular, their influence on nicotine's addiction-like processes remains unknown. In addition, evidence shows that glial cells shape the neuronal activity of the mesolimbic system but their regulation, within this system, by the gut microbiome is not established. We demonstrate that a lack of gut microbiota in male mice potentiates the nicotine-induced activation of sub-regions of the mesolimbic system. We further show that gut microbiota depletion enhances the response to nicotine of dopaminergic neurons of the posterior ventral tegmental area (pVTA), and alters nicotine's rewarding and aversive effects in an intra-VTA self-administration procedure. These effects were not associated with gross behavioral alterations and the nicotine withdrawal syndrome was not impacted. We further show that depletion of the gut microbiome modulates the glial cells of the mesolimbic system. Notably, it increases the number of astrocytes selectively in the pVTA, and the expression of postsynaptic density protein 95 in both VTA sub-regions, without altering the density of the astrocytic glutamatergic transporter GLT1. Finally, we identify several sub-populations of microglia in the VTA that differ between its anterior and posterior sub-parts, and show that they are re-organized in conditions of gut microbiota depletion. The present study paves the way for refining our understanding of the pathophysiology of nicotine addiction.

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Authors
Lakosa, A., Rahimian, A., Tomasi, F., Marti, F., Reynolds, L. M., Tochon, L., David, V., Danckaert, A., Canonne, C., Tahraoui, S., de Chaumont, F., Forget, B., Maskos, U., & Besson, M.
Affiliations
  • Centre National de la Recherche Scientifique (FR)
  • Institut Pasteur (FR)
Corresponding author
Besson, Morgane
Venue
Neuropsychopharmacology
Published
2023-03-17
Volume
48
Issue
6
Pages
963-974
ISSN
  • 0893-133X (ISSN-L)
  • 1740-634X
OpenAlex
W4327745362
Cited by
10
References
92
Citations by year
2026: 2 · 2025: 4 · 2024: 3 · 2023: 1
FWCI
1.21
Type
journal article
Language
en
Open access
Locations
  • Neuropsychopharmacology (publishedVersion)
  • PubMed Central (publishedVersion)
  • PubMed (publishedVersion)
  • HAL (submittedVersion, cc-by-nc)
Funders
  • Agence Nationale de la Recherche (ANR-10-INSB-04-01, “Investments for the future”)
  • Institut Pasteur (GPF Microbes and Brain, project “µBIOTADDICT”)
Topics
  • Life Sciences › Neuroscience › Cellular and Molecular Neuroscience › Neurotransmitter Receptor Influence on Behavior
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Gut microbiota and health
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Nicotinic Acetylcholine Receptors Study
Keywords
gut microbiota, nicotine dependence, ventral tegmental area, mesolimbic system, glial cells, microglia, astrocytes, PSD-95, GLT-1, drug reward, nicotine self-administration, gut dysbiosis, nicotine withdrawal
MeSH terms
Gastrointestinal Microbiome, Animals, Dopamine, Male, Neuroglia, Nicotine, Reward, Substance Withdrawal Syndrome, Ventral Tegmental Area, Mice

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