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Brain Structure and Response to Emotional Stimuli as Related to Gut Microbial Profiles in Healthy Women.

Abstract：

OBJECTIVE:Brain-gut-microbiota interactions may play an important role in human health and behavior. Although rodent models have demonstrated effects of the gut microbiota on emotional, nociceptive, and social behaviors, there is little translational human evidence to date. In this study, we identify brain and behavioral characteristics of healthy women clustered by gut microbiota profiles. METHODS:Forty women supplied fecal samples for 16S rRNA profiling. Microbial clusters were identified using Partitioning Around Medoids. Functional magnetic resonance imaging was acquired. Microbiota-based group differences were analyzed in response to affective images. Structural and diffusion tensor imaging provided gray matter metrics (volume, cortical thickness, mean curvature, surface area) as well as fiber density between regions. A sparse Partial Least Square-Discrimination Analysis was applied to discriminate microbiota clusters using white and gray matter metrics. RESULTS:Two bacterial genus-based clusters were identified, one with greater Bacteroides abundance (n = 33) and one with greater Prevotella abundance (n = 7). The Prevotella group showed less hippocampal activity viewing negative valences images. White and gray matter imaging discriminated the two clusters, with accuracy of 66.7% and 87.2%, respectively. The Prevotella cluster was associated with differences in emotional, attentional, and sensory processing regions. For gray matter, the Bacteroides cluster showed greater prominence in the cerebellum, frontal regions, and the hippocampus. CONCLUSIONS:These results support the concept of brain-gut-microbiota interactions in healthy humans. Further examination of the interaction between gut microbes, brain, and affect in humans is needed to inform preclinical reports that microbial modulation may affect mood and behavior.

journal_name

Psychosom Med

journal_title

Psychosomatic medicine

authors

Tillisch K,Mayer EA,Gupta A,Gill Z,Brazeilles R,Le Nevé B,van Hylckama Vlieg JET,Guyonnet D,Derrien M,Labus JS

doi

10.1097/PSY.0000000000000493

subject

Has Abstract

pub_date

2017-10-01 00:00:00

pages

905-913

issue

eissn

0033-3174

issn

1534-7796

journal_volume

pub_type

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Brain Structure and Response to Emotional Stimuli as Related to Gut Microbial Profiles in Healthy Women.