title: Clinically silent inflammatory gut lesions in undifferentiated spondyloarthropathies.
abstract: Gastrointestinal inflammation or infection can be associated with various forms of arthritis, such as, acute reactive arthritis triggered by enteritis due to gram-negative bacteria or ankylosing spondylitis and peripheral arthritis in relation to Crohn's disease and ulcerative colitis. Using colonoscopy, we have found a high prevalence of clinically silent inflammatory lesions in 38 patients (24 males and 14 females) affected by undifferentiated spondyloarthropathies (SpA). Microscopic inflammatory lesions were present in all the patients. Three patterns of nonspecific chronic inflammatory alterations were observed. No difference was noted between patients taking or not taking nonsteroidal anti-inflammatory drugs. Direct immunofluorescence demonstrated the presence of IgG, IgA, IgM, C3, C4 and fibrinogen in 75% of the specimens examined. The finding of chronic inflammatory gut lesions hypothesizes that a local activation of the immune system depending on the persistence of intestinal microbial antigens or toxins, due to impaired elimination or increased exposition, may have a part in the pathogenesis of SpA.
authors.affiliation: Divisione di Reumatologia, Istituto di Medicina Interna e Geriatria, Università Cattolica del Sacro Cuore, Roma, Italy.
authors.forename: L
authors.initials: L
authors.lastname: Altomonte
authors.forename: A
authors.initials: A
authors.lastname: Zoli
authors.forename: A
authors.initials: A
authors.lastname: Veneziani
authors.forename: L
authors.initials: L
authors.lastname: Mirone
authors.forename: G
authors.initials: G
authors.lastname: Santacesaria
authors.forename: C
authors.initials: C
authors.lastname: Chiarelli
authors.forename: F
authors.initials: F
authors.lastname: Federico
authors.forename: G
authors.initials: G
authors.lastname: Massi
authors.forename: M
authors.initials: M
authors.lastname: Magaro
mesh_terms: D000328:Adult; D000894:Anti-Inflammatory Agents, Non-Steroidal / Q000627:therapeutic use; D001168:Arthritis / Q000150:complications* / Q000188:drug therapy / Q000276:immunology; D002908:Chronic Disease; D003113:Colonoscopy; D005260:Female; D005455:Fluorescent Antibody Technique; D005759:Gastroenteritis / Q000209:etiology* / Q000473:pathology*; D006801:Humans; D008297:Male; D008875:Middle Aged; D013167:Spondylitis, Ankylosing / Q000150:complications* / Q000188:drug therapy / Q000276:immunology
chemical_list: D000894:Anti-Inflammatory Agents, Non-Steroidal