Cited by 1,093Gut microbiota and healthTryptophan and brain disordersGastrointestinal motility and disorders

Control of brain development, function, and behavior by the microbiome

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Sampson, Timothy R., Mazmanian, Sarkis K.·2015·Cell Host & Microbe

Abstract

Animals share an intimate and life-long partnership with a myriad of resident microbial species, collectively referred to as the microbiota. Symbiotic microbes have been shown to regulate nutrition and metabolism and are critical for the development and function of the immune system. More recently, studies have suggested that gut bacteria can impact neurological outcomes--altering behavior and potentially affecting the onset and/or severity of nervous system disorders. In this review, we highlight emerging evidence that the microbiome extends its influence to the brain via various pathways connecting the gut to the central nervous system. While understanding and appreciation of a gut microbial impact on neurological function is nascent, unraveling gut-microbiome-brain connections holds the promise of transforming the neurosciences and revealing potentially novel etiologies for psychiatric and neurodegenerative disorders.

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Crossref · 10.1016/j.chom.2015.04.011

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  • In animal experimentation and some small human studies, dysbiosis has been shown to impact brain and behavioral parameters including cortisol regulation, depressive and anxious symptomatology, and social functioning.

    “In animal experimentation and some small human studies, dysbiosis has also been shown to impact relevant brain and behavioral parameters, including cortisol regulation, depressive and anxious symptomatology, and social functioning [77, 79].”

    From Biological embedding of childhood adversity: from physiological mechanisms to clinical implications (2017) · cites this paper as [79]

    The section “Role of the Microbiota in Mood and Individual Behaviors” reports animal findings on stress hormones and depression-like behavior, plus small human probiotic studies reporting reduced anxiety, sadness, and urinary cortisol. “The Link between Gut Bacteria and Disorders Involving Social Impairment” reports improved communication-related behavior in a mouse model, but describes the proposed microbial role in autism as still requiring validation. The claim overstates these findings by treating dysbiosis as a demonstrated cause across the listed outcomes, particularly social functioning in humans. (LLM, conf=0.86)

    Experimental — accuracy not yet measured
  • The GM influences the stress system, behavior, and cognition in animals.

    “Studies in animals have demonstrated the effect that the GM has on neural development and neurochemistry in the host, influencing the stress system, behavior, and cognition (42–47).”
  • Animal studies suggest that the GM plays a crucial role in regulating early brain development.

    “Animal studies suggest that the GM plays a crucial role in regulating early brain development (19, 45, 60, 114–117).”

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Authors
Sampson, T. R., & Mazmanian, S. K.
Affiliations
California Institute of Technology (US)
Corresponding author
Mazmanian, Sarkis K.
Venue
Cell Host & Microbe
Publisher
Elsevier BV
Published
2015-05
Volume
17
Issue
5
Pages
565-576
ISSN
1931-3128 (ISSN-L)
OpenAlex
W2123097904
Cited by
1,093
References
107
Citations by year
2026: 48 · 2025: 94 · 2024: 117 · 2023: 95 · 2022: 130 · 2021: 138 · 2020: 121 · 2019: 120 · 2018: 87 · 2017: 67 · 2016: 63 · 2015: 11
FWCI
7.37
Type
journal article
Language
en
Open access
Locations
  • Cell Host & Microbe (publishedVersion)
  • PubMed (publishedVersion)
  • PubMed Central (acceptedVersion)
  • CaltechAUTHORS (California Institute of Technology) (submittedVersion)
Funders
  • National Institute of Mental Health (R01MH100556, MH100556)
  • National Institute of Diabetes and Digestive and Kidney Diseases (DK 078938, R01DK078938, R56DK078938)
  • National Institute of Neurological Disorders and Stroke (NS085910, R01NS085910)
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Gut microbiota and health
  • Life Sciences › Neuroscience › Biological Psychiatry › Tryptophan and brain disorders
  • Health Sciences › Medicine › Gastroenterology › Gastrointestinal motility and disorders
Keywords
gut microbiota, gut-brain axis, microbiota, brain development, neurobehavior, neurological disorders, neurodegenerative diseases, mental illness, central nervous system, immune system development, host-microbe symbiosis
MeSH terms
Gastrointestinal Microbiome, Animals, Behavior, Brain, Humans, Gastrointestinal Tract

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