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Stress matters: Randomized controlled trial on the effect of probiotics on neurocognition.

ABSTRACT: Probiotics are microorganisms that provide health benefits when consumed. In animals, probiotics reverse gut microbiome-related alterations in depression-like symptoms, in cognition, and in hormonal stress response. However, in humans, a causal understanding of the gut-brain link in emotion and cognition is lacking. Additionally, whether the effects of probiotics on neurocognition are visible only in presence of stress, remains unclear. We investigated the effects of a multispecies probiotic (Ecologic®Barrier) on specific neurocognitive measures of emotion reactivity, emotion regulation, and cognitive control using fMRI. Critically, we also tested whether probiotics can buffer against the detrimental effects of acute stress on working memory. In a double blind, randomized, placebo-controlled, between-subjects intervention study, 58 healthy participants were tested once before and once after a 28-day intervention. Without stress induction, probiotics did not affect brain, behavioral, or related self-report measures. However, relative to placebo, the probiotics group did show a significant stress-related increase in working memory performance after supplementation. This change was associated with intervention-related neural changes in frontal cortex during cognitive control exclusively in the probiotics group. Overall, our results show neurocognitive effects of a multispecies probiotic in healthy women only under challenging situations, buffering against the detrimental effects of stress on cognition.

SUBMITTER: Papalini S

PROVIDER: S-EPMC6430409 | biostudies-literature | 2019 Feb

REPOSITORIES: biostudies-literature

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Stress matters: Randomized controlled trial on the effect of probiotics on neurocognition.

Papalini S S Michels F F Kohn N N Wegman J J van Hemert S S Roelofs K K Arias-Vasquez A A Aarts E E

Neurobiology of stress 20181210

Probiotics are microorganisms that provide health benefits when consumed. In animals, probiotics reverse gut microbiome-related alterations in depression-like symptoms, in cognition, and in hormonal stress response. However, in humans, a causal understanding of the gut-brain link in emotion and cognition is lacking. Additionally, whether the effects of probiotics on neurocognition are visible only in presence of stress, remains unclear. We investigated the effects of a multispecies probiotic (Ec ...[more]

PMID: 30937347

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Project description:Burnout is highly prevalent in residents. No randomized controlled trials have been conducted measuring the effects of Mindfulness-Based Stress Reduction (MBSR) on burnout in residents.To determine the effectiveness of MBSR in reducing burnout in residents.A randomized controlled trial comparing MBSR with a waitlist control group.Residents from all medical, surgical and primary care disciplines were eligible to participate. Participants were self-referred.The MBSR consisted of eight weekly 2.5-h sessions and one 6-h silent day.The primary outcome was the emotional exhaustion subscale of the Dutch version of the Maslach Burnout Inventory-Human Service Survey. Secondary outcomes included the depersonalization and reduced personal accomplishment subscales of burnout, worry, work-home interference, mindfulness skills, self-compassion, positive mental health, empathy and medical errors. Assessment took place at baseline and post-intervention approximately 3 months later.Of the 148 residents participating, 138 (93%) completed the post-intervention assessment. No significant difference in emotional exhaustion was found between the two groups. However, the MBSR group reported significantly greater improvements than the control group in personal accomplishment (p?=?0.028, d?=?0.24), worry (p?=?0.036, d?=?0.23), mindfulness skills (p?=?0.010, d?=?0.33), self-compassion (p?=?0.010, d?=?0.35) and perspective-taking (empathy) (p?=?0.025, d?=?0.33). No effects were found for the other measures. Exploratory moderation analysis showed that the intervention outcome was moderated by baseline severity of emotional exhaustion; those with greater emotional exhaustion did seem to benefit.The results of our primary outcome analysis did not support the effectiveness of MBSR for reducing emotional exhaustion in residents. However, residents with high baseline levels of emotional exhaustion did appear to benefit from MBSR. Furthermore, they demonstrated modest improvements in personal accomplishment, worry, mindfulness skills, self-compassion and perspective-taking. More research is needed to confirm these results.

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Stress matters: Randomized controlled trial on the effect of probiotics on neurocognition.

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Stress matters: Randomized controlled trial on the effect of probiotics on neurocognition.

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