Probiotics Help Offset Stress-Induced GI Dysfunction

Byron's Comments:

A good balance of healthy digestive flora offsets damage to your GI tract that can be caused by stress.

Study Title:

The Role of Microbiota and Probiotics in Stress-Induced Gastro-intestinal Damage.

Study Abstract:

Stress has a major impact on gut physiology and may affect the clinical course of gastro-intestinal diseases. In this review, we focus on the interaction between commensal gut microbiota and intestinal mucosa during stress and discuss the possibilities to counteract the deleterious effects of stress with probiotics. Normally, commensal microbes and their hosts benefit from a symbiotic relationship. Stress does, however, reduce the number of Lactobacilli, while on the contrary, an increased growth, epithelial adherence and mucosal uptake of gram-negative pathogens, e.g. E. coli and Pseudomonas, are seen. Moreover, intestinal bacteria have the ability to sense a stressed host and up-regulate their virulence factors when opportunity knocks. Probiotics are “live microorganisms which, when administered in adequate amounts, confer a health benefit on the host”, and mainly represented by Lactic Acid Bacteria. Probiotics can counteract stress-induced changes in intestinal barrier function, visceral sensitivity and gut motility. These effects are strain specific and mediated by direct bacterial-host cell interaction and/or via soluble factors. Mechanisms of action include competition with pathogens for essential nutrients, induction of epithelial heat-shock proteins, restoring of tight junction protein structure, up-regulation of mucin genes, secretion of defensins, and regulation of the NFkappaB signalling pathway. In addition, the reduction of intestinal pain perception was shown to be mediated via cannabinoid receptors. Based on the studies reviewed here there is clearly a rationale for probiotic treatment in patients with stress-related intestinal disorders. We are however far from being able to choose the precise combination of strains or bacterial components for each clinical setting.

PMID: 18537636 [PubMed - in process]

Study Information:

Lutgendorff F, Akkermans LM, Söderholm JD. The Role of Microbiota and Probiotics in Stress-Induced Gastro-intestinal Damage. Curr Mol Med.  2008 June 8(4):282-98.
Department of Clinical and Experimental Medicine, Division of Surgery, University Hospital, SE-581 85 Linköping, Sweden.




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