Breaking down the barriers: the gut microbiome, intestinal permeability and stress-related psychiatric disorders. - PubMed - NCBI

Breaking down the barriers: the gut microbiome, intestinal permeability and stress-related psychiatric disorders. - PubMed - NCBI

Front Cell Neurosci. 2015 Oct 14;9:392. doi: 10.3389/fncel.2015.00392. eCollection 2015.

Breaking down the barriers: the gut microbiome, intestinal permeability and stress-related psychiatric disorders.

Kelly JR1, Kennedy PJ2, Cryan JF3, Dinan TG1, Clarke G1, Hyland NP4.

Author information

Abstract

The emerging links between our gut microbiome and the central nervous system (CNS) are regarded as a paradigm shift in neuroscience with possible implications for not only understanding the pathophysiology of stress-related psychiatric disorders, but also their treatment. Thus the gut microbiome and its influence on host barrier function is positioned to be a critical node within the brain-gut axis. Mounting preclinical evidence broadly suggests that the gut microbiota can modulate brain development, function and behavior by immune, endocrine and neural pathways of the brain-gut-microbiota axis. Detailed mechanistic insights explaining these specific interactions are currently underdeveloped. However, the concept that a "leaky gut" may facilitate communication between the microbiota and these key signaling pathways has gained traction. Deficits in intestinal permeability may underpin the chronic low-grade inflammation observed in disorders such as depression and the gut microbiome plays a critical role in regulating intestinal permeability. In this review we will discuss the possible role played by the gut microbiota in maintaining intestinal barrier function and the CNS consequences when it becomes disrupted. We will draw on both clinical and preclinical evidence to support this concept as well as the key features of the gut microbiota which are necessary for normal intestinal barrier function.

KEYWORDS:

depression; gut microbiota; gut-brain axis; intestinal barrier; probiotics; psychobiotics

PMID:

 

26528128

 

[PubMed] 

PMCID:

 

PMC4604320

 

Free PMC Article

PMC full text:

Front Cell Neurosci. 2015; 9: 392. Published online 2015 Oct 14. doi:  10.3389/fncel.2015.00392 Copyright/License ►Request permission to reuse

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Figure 1

The brain-gut-microbiota axis. Postulated signaling pathways between the gut microbiota, the intestinal barrier and the brain. A dysfunctional intestinal barrier or “leaky gut” could permit a microbiota-driven proinflammatory state with implications for neuroinflammation.