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Bifidobacterium longum 1714™ Strain Modulates Brain Activity of Healthy Volunteers During Social Stress
Open accessAbstract
OBJECTIVES: Accumulating evidence indicates that the gut microbiota communicates with the central nervous system, possibly through neural, endocrine, and immune pathways, and influences brain function. B. longum 1714™ has previously been shown to attenuate cortisol output and stress responses in healthy subjects exposed to an acute stressor. However, the ability of B. longum 1714™ to modulate brain function in humans is unclear. METHODS: In a randomized, double-blinded, placebo-controlled trial, the effects of B. longum 1714™ on neural responses to social stress, induced by the "Cyberball game," a standardized social stress paradigm, were studied. Forty healthy volunteers received either B. longum 1714™ or placebo for 4 weeks at a dose of 1 × 10 cfu/d. Brain activity was measured using magnetoencephalography and health status using the 36-item short-form health survey. RESULTS: B. longum 1714™ altered resting-state neural oscillations, with an increase in theta band power in the frontal and cingulate cortex (P < 0.05) and a decrease in beta-3 band in the hippocampus, fusiform, and temporal cortex (P < 0.05), both of which were associated with subjective vitality changes. All groups showed increased social stress after a 4-week intervention without an effect at behavioral level due to small sample numbers. However, only B. longum 1714™ altered neural oscillation after social stress, with increased theta and alpha band power in the frontal and cingulate cortex (P < 0.05) and supramarginal gyrus (P < 0.05). DISCUSSION: B. longum 1714™ modulated resting neural activity that correlated with enhanced vitality and reduced mental fatigue. Furthermore, B. longum 1714™ modulated neural responses during social stress, which may be involved in the activation of brain coping centers to counter-regulate negative emotions.
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“Most human intervention studies have focused on probiotic and prebiotic supplementation to manipulate the microbiota and investigate the effect on brain function and mental health (327, 328).”
From Diet and the Microbiota–Gut–Brain Axis: Sowing the Seeds of Good Mental Health (2021) · cites this paper as [328]
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Metadata
- Authors
- Wang, H., Braun, C., Murphy, E. F., & Enck, P.
- Affiliations
- Universitätsklinikum Tübingen (DE)
- University of Trento (IT)
- Alimentary Health (Ireland) (IE)
- University of Tübingen (DE)
- Corresponding author
- Enck, Paul
- Venue
- American Journal of Gastroenterology
- Published
- 2019-04-17
- Volume
- 114
- Issue
- 7
- Pages
- 1152-1162
- ISSN
- 0002-9270 (ISSN-L)
- 1572-0241
- PMC
- PMC6615936
- OpenAlex
- W2942132156
- Cited by
- 159
- References
- 50
- Citations by year
- 2026: 18 · 2025: 24 · 2024: 23 · 2023: 20 · 2022: 26 · 2021: 23 · 2020: 15 · 2019: 9
- FWCI
- 14.08
- Type
- journal article
- Language
- en
- Open access
- hybrid
- doi.org
- Licence
- Locations
- The American Journal of Gastroenterology (publishedVersion, cc-by-nc-nd)
- PubMed Central (publishedVersion)
- PubMed (publishedVersion)
- Funders
- University College Cork
- Alimentary Health
- APC Microbiome Institute
- Topics
- Life Sciences › Agricultural and Biological Sciences › Food Science › Probiotics and Fermented Foods
- Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Gut microbiota and health
- Health Sciences › Medicine › Gastroenterology › Gastrointestinal motility and disorders
- Keywords
- probiotics, social stress, gut-brain axis, theta power, beta power, alpha power, Cyberball game, subjective vitality, mental fatigue, cingulate cortex, hippocampus, magnetoencephalography
- MeSH terms
- Gastrointestinal Microbiome, Bifidobacterium longum, Analysis of Variance, Brain, Double-Blind Method, Female, Humans, Magnetic Resonance Imaging, Male, Stress, Psychological, Statistics, Nonparametric, Probiotics, Young Adult, Healthy Volunteers
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