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Probiotics and the management of inflammatory bowel disease Fedorak RN; Madsen KLInflamm Bowel Dis 2004[May]; 10 (3): 286-99The demonstration that immune and epithelial cells can discriminate between different microbial species has extended our understanding of the actions of probiotics beyond simple barrier and antimicrobial concepts. Several probiotic mechanisms of action, relative to inflammatory bowel disease, have been elucidated: (1) competitive exclusion, whereby probiotics compete with microbial pathogens for a limited number of receptors present on the surface epithelium; (2) immunomodulation and/or stimulation of an immune response of gut-associated lymphoid and epithelial cells; (3) antimicrobial activity and suppression of pathogen growth; (4) enhancement of barrier function; and (5) induction of T cell apoptosis in the mucosal immune compartment. The unraveling of these mechanisms of action has led to new support for the use of probiotics in the management of clinical inflammatory bowel disease. Though level 1 evidence now supports the therapeutic use of probiotics in the treatment of postoperative pouchitis, only levels 2 and 3 evidence is currently available in support of the use of probiotics in the treatment of ulcerative colitis and Crohn's disease. Nevertheless, one significant and consistent finding has emerged during the course of research in the past year: not all probiotic bacteria have similar therapeutic effects. Rigorously designed, controlled clinical trials are vital to investigate the unresolved issues related to efficacy, dose, duration of use, single or multi-strain formulation, and the concomitant use of probiotics, synbiotics, or antibiotics.|Acute Disease[MESH]|Bifidobacterium[MESH]|Clinical Trials as Topic[MESH]|Colitis, Ulcerative/therapy[MESH]|Crohn Disease/therapy[MESH]|Humans[MESH]|Inflammatory Bowel Diseases/microbiology/*therapy[MESH]|Lactobacillus[MESH]|Pouchitis/therapy[MESH]|Probiotics/*pharmacology/*therapeutic use[MESH]|Remission Induction[MESH]|Treatment Outcome[MESH] |
