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Diagnostic utility of faecal biomarkers in patients with irritable bowel syndrome Dabritz J; Musci J; Foell DWorld J Gastroenterol 2014[Jan]; 20 (2): 363-75Irritable bowel syndrome (IBS) is a common functional gastrointestinal (GI) disorder characterized by unspecific symptoms. In clinical practice it is crucial to distinguish between non-inflammatory functional problems and inflammatory, malignant or infectious diseases of the GI tract. Differentiation between these involves the use of clinical, radiological, endoscopic, histological and serological techniques, which are invasive, expensive, time-consuming and/or hindered by inaccuracies arising from subjective components. A range of faecal markers now appears to have the potential to greatly assist in the differentiation of inflammatory bowel disease (IBD) and IBS. Faecal markers of neutrophil influx into the mucosa are reliable indicators of intestinal inflammation and their role has been mainly studied in discriminating IBD from non-IBD conditions (including IBS) rather than organic from non-organic diseases. Phagocyte-specific proteins of the S100 family (S100A12, calprotectin) are amongst the most promising faecal biomarkers of inflammation. Faecal leukocyte degranulation markers (lactoferrin, polymorphonuclear elastase and myeloperoxidase) have also been suggested as diagnostic tools for the differentiation of IBD and IBS. More recently, additional proteins, including granins, defensins and matrix-metalloproteases, have been discussed as differential diagnostic markers in IBD and IBS. In this review, some of the most promising faecal markers, which have the potential to differentiate IBD and IBS and to advance diagnostic practices, will be discussed.|Animals[MESH]|Biomarkers/*analysis[MESH]|Diagnosis, Differential[MESH]|Feces/*chemistry[MESH]|Humans[MESH]|Inflammatory Bowel Diseases/*diagnosis/metabolism[MESH]|Irritable Bowel Syndrome/*diagnosis/metabolism[MESH]|Predictive Value of Tests[MESH]|Prognosis[MESH] |
