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Cited by 477

The DOI matches its Crossref record; 17 of the 17 references it cites were found in a registry or an index.

Intestinal serotonin and fluoxetine exposure modulate bacterial colonization in the gut

Open access
Fung, Thomas C., Vuong, Helen E., Luna, Cristopher D. G., Pronovost, Geoffrey N., Aleksandrova, Antoniya A., Riley, Noah G., Vavilina, Anastasia, McGinn, Julianne, Rendon, Tomiko, Forrest, Lucy R., Hsiao, Elaine Y.·2019·Nature Microbiology

Abstract

The gut microbiota regulates levels of serotonin (5-hydroxytryptamine (5-HT)) in the intestinal epithelium and lumen1–5. However, whether 5-HT plays a functional role in bacteria from the gut microbiota remains unknown. We demonstrate that elevating levels of intestinal lumenal 5-HT by oral supplementation or genetic deficiency in the host 5-HT transporter (SERT) increases the relative abundance of spore-forming members of the gut microbiota, which were previously reported to promote host 5-HT biosynthesis. Within this microbial community, we identify Turicibacter sanguinis as a gut bacterium that expresses a neurotransmitter sodium symporter-related protein with sequence and structural homology to mammalian SERT. T. sanguinis imports 5-HT through a mechanism that is inhibited by the selective 5-HT reuptake inhibitor fluoxetine. 5-HT reduces the expression of sporulation factors and membrane transporters in T. sanguinis, which is reversed by fluoxetine exposure. Treating T. sanguinis with 5-HT or fluoxetine modulates its competitive colonization in the gastrointestinal tract of antibiotic-treated mice. In addition, fluoxetine reduces the membership of T. sanguinis in the gut microbiota of conventionally colonized mice. Host association with T. sanguinis alters intestinal expression of multiple gene pathways, including those important for lipid and steroid metabolism, with corresponding reductions in host systemic triglyceride levels and inguinal adipocyte size. Together, these findings support the notion that select bacteria indigenous to the gut microbiota signal bidirectionally with the host serotonergic system to promote their fitness in the intestine. The gut microbiota regulates levels of serotonin (5-HT) in the gut, affecting the mammalian nervous system. But does 5-HT affect the microbiota? Here, it is shown to increase the relative abundance of spore-forming members of the gut microbiota and enhance mouse colonization by Turicibacter sanguinis, a gut bacterium that can take up 5-HT and modulate systemic lipid homeostasis.

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Crossref · 10.1038/s41564-019-0540-4

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Metadata

Authors
Fung, T. C., Vuong, H. E., Luna, C. D. G., Pronovost, G. N., Aleksandrova, A. A., Riley, N. G., Vavilina, A., McGinn, J., Rendon, T., Forrest, L. R., & Hsiao, E. Y.
Venue
Nature Microbiology
Published
2019-09-02
Volume
4
Issue
12
Pages
2064-2073
ISSN
2058-5276 (ISSN-L)
OpenAlex
W2971786247
Cited by
477
References
17
FWCI
15.54
Type
journal article
Language
en
Open access
green

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