Abstract Title:

Gut emotions - mechanisms of action of probiotics as novel therapeutic targets for depression and anxiety disorders.

Abstract Source:

CNS Neurol Disord Drug Targets. 2014 ;13(10):1770-86. PMID: 25470391

Abstract Author(s):

Anastasiya Slyepchenko, Andre F Carvalho, Danielle S Cha, Siegfried Kasper, Roger S McIntyre

Article Affiliation:

Anastasiya Slyepchenko

Abstract:

A priority clinical and research agenda in mood and anxiety disorders is to identify determinants that influence illness trajectory and outcome. Over the past decade, studies have demonstrated a bidirectional relationship between the gut microbiome and brain function (i.e., the microbiota-gut-brain axis). Probiotic treatments and developmental analysis of the microbiome may provide potential treatments and preventative measures for depressive and anxiety disorders. This systematic literature review aims to identify original studies linking the gut microbiota to major depressive disorder and anxiety disorders. Furthermore, this review searched for original reports focusing on possible therapeutic and preventative effects of probiotics for these debilitating conditions. Accumulating data indicate that the gut microbiota communicates with the CNS through neural, endocrine and immune pathways. Studies in germ-free animals indicate that the microbiota is involved in the regulation of the stress response (e.g., hypothalamic-pituitary-adrenal axis) and in CNS development at critical stages. Probiotics attenuate anxiety and depressive-like behaviors in experimental animal models. Notwithstanding some inconsistencies and methodological limitations across trials, clinical studies suggest that probiotics may mitigate anxiety symptoms. However, future studies should investigate the anxiolytic and antidepressant effects of probiotics in more phenotypically homogeneous populations. In conclusion, the emerging concept of a gut microbiota-brain axis suggests that the modulation of the gut microbiota may provide a novel therapeutic target for the treatment and/or prevention of mood and anxiety disorders.

Study Type : Review

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