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      Enteropathic Spondyloarthritis: From Diagnosis to Treatment

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          Abstract

          Enteropathic arthritis (EA) is a spondyloarthritis (SpA) which occurs in patients with inflammatory bowel diseases (IBDs) and other gastrointestinal diseases. Diagnosis is generally established on the medical history and physical examination. It was, generally, made according to the European Spondyloarthropathy Study Group (ESSG) criteria. Rheumatic manifestations are the most frequent extraintestinal findings of IBD with a prevalence between 17% and 39%, and IBD is associated, less frequently, with other rheumatic disease such as rheumatoid arthritis, Sjogren syndrome, Takayasu arteritis, and fibromyalgia. Although the pathogenesis of EA has not been plainly clarified, the most popular theory supposes that joint inflammation occurs in genetically predisposed subjects with bacterial gut infections, provided an important evidence for a possible relationship between inflammation of the gut mucosa and arthritis. The management of patients with EA requires an active cooperation between the gastroenterologist and rheumatologist.

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          The germfree state prevents development of gut and joint inflammatory disease in HLA-B27 transgenic rats

          A number of inflammatory disease states occur with greatly increased frequency in individuals inheriting the human major histocompatibility complex class I allele HLA-B27. In a minority of cases, namely those with B27-associated reactive arthritis, there is good evidence that the disease state is triggered by infection with an enteric or genitourinary bacterial pathogen. For the majority of B27-associated disease, no definite pathogenetic role for bacteria has been established. However, in these latter cases intestinal inflammation can often be demonstrated, and it sometimes occupies a major part of the clinical picture. Rats transgenic for B27 are known to develop a disorder resembling B27-associated human disease, with prominent intestinal, joint, skin, and male genital inflammatory lesions. We report here that B27 transgenic rats raised in a germfree environment do not develop inflammatory intestinal or peripheral joint disease, whereas the skin and genital inflammatory lesions are unaffected by the germfree state. These findings support the concept that gut and joint inflammation are pathogenetically closely related, and they provide direct evidence that the commensal gut flora play an important role in the pathogenesis of B27-associated gut and joint inflammation.
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            The prevalence of extraintestinal diseases in inflammatory bowel disease: a population-based study.

            The aim of this study was to determine the prevalence of the major extraintestinal manifestations of inflammatory bowel disease (IBD) and their relation to disease diagnosis and gender. We used the population-based University of Manitoba IBD Database, which includes longitudinal files on all subjects of all health system contacts identified by International Classification of Diseases, 9th Revision, Clinical Modification codes for visit diagnosis. We extracted a cohort from our database, which included subjects with a known diagnosis of IBD for at least 10 yr. We then determined how many contacts each subject had for each of the following extraintestinal IBD-associated immune diseases: primary sclerosing cholangitis, ankylosing spondylitis, iritis/uveitis, pyoderma gangrenosum, and erythema nodosum. We calculated the prevalence of the extraintestinal diseases using an administrative definition of having at least five health system contacts for the diagnosis in question. This administrative definition has previously been validated in Crohn's disease and ulcerative colitis (UC). A total of 6.2% of patients with IBD had one of six major extraintestinal diseases studied in this report. Only 0.3% of patients had multiple extraintestinal diseases. Iritis/uveitis was the most common extraintestinal disease of all assessed (2.2% of women and 1.1% of men). Iritis/uveitis was more common among women, particularly those with UC (3.8%). Primary sclerosing cholangitis was most common among men with UC (3%). Ankylosing spondylitis was more common among men, and the highest rate was seen among men with Crohn's disease (2.7%). Pyoderma gangrenosum was more common in Crohn's (1.2%) with no gender predilection. Erythema nodosum was similarly present in Crohn's and UC but was more common among women (1.9%). The associations of immune mediated diseases in extraintestinal sites may help us to further our understanding of IBD pathogenesis, and it may help us in developing a paradigm of disease subsets.
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              The European Spondylarthropathy Study Group preliminary criteria for the classification of spondylarthropathy.

              Classification criteria for most of the disorders belonging to the spondylarthropathy group already exist. However, the spectrum of spondylarthropathy is wider than the sum of these disorders suggests. Seronegative oligoarthritis, dactylitis or polyarthritis of the lower extremities, heel pain due to enthesitis, and other undifferentiated cases of spondylarthropathy have been ignored in epidemiologic studies because of the inadequacy of existing criteria. In order to define classification criteria that also encompass patients with undifferentiated spondylarthropathy, we studied 403 patients with all forms of spondylarthropathy and 674 control patients with other rheumatic diseases. The diagnoses were based on the local clinical expert's opinion. The 403 patients included 168 with ankylosing spondylitis, 68 with psoriatic arthritis, 41 with reactive arthritis, 17 with inflammatory bowel disease and arthritis, and 109 with unclassified spondylarthropathy. Based on statistical analysis and clinical reasoning, we propose the following classification criteria for spondylarthropathy: inflammatory spinal pain or synovitis (asymmetric or predominantly in the lower limbs), together with at least 1 of the following: positive family history, psoriasis, inflammatory bowel disease, urethritis, or acute diarrhea, alternating buttock pain, enthesopathy, or sacroiliitis as determined from radiography of the pelvic region. These criteria resulted in a sensitivity of 87% and a specificity of 87%. The proposed classification criteria are easy to apply in clinical practice and performed well in all 7 participating centers. However, we regard them as preliminary until they have been further evaluated in other settings.
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                Author and article information

                Journal
                Clin Dev Immunol
                Clin. Dev. Immunol
                CDI
                Clinical and Developmental Immunology
                Hindawi Publishing Corporation
                1740-2522
                1740-2530
                2013
                15 April 2013
                : 2013
                : 631408
                Affiliations
                1Rheumatology Research Unit, University Federico II, 80131 Naples, Italy
                2Department of Clinical and Experimental Medicine, University Federico II, 80131 Naples, Italy
                3Regional Reference Center for Coagulation Disorders, University Federico II, 80131 Naples, Italy
                4Complex Operating Unit of Gastroenterology, AORN “A.Cardarelli,” Via Sergio Pansini 5, 80131 Naples, Italy
                5Gastroenterology Research Unit, University Federico II, 80131 Naples, Italy
                Author notes

                Academic Editor: Chung Tei Chou

                Article
                10.1155/2013/631408
                3649644
                23690825
                b411883f-b6a9-4f43-8c56-733bd8e73788
                Copyright © 2013 Rosario Peluso et al.

                This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

                History
                : 19 October 2012
                : 25 March 2013
                Categories
                Review Article

                Immunology
                Immunology

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