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  • Title: Elevated serum anti-carbonic anhydrase II antibodies in patients with ulcerative colitis.
    Author: Andoh A, Fujiyama Y, Yoshioka U, Sasaki M, Araki Y, Tsujikawa T, Bamba T.
    Journal: Int J Mol Med; 2002 May; 9(5):499-502. PubMed ID: 11956656.
    Abstract:
    An autoimmune mechanism has been postulated for the pathogenesis of ulcerative colitis (UC). The aim of this study was to evaluate the presence of anti-carbonic anhydrase (CA) I and anti-CA II antibodies in a series of inflammatory bowel disease (IBD) patients. We studied 58 IBD patients [36 UC patients and 21 patients with Crohn's disease (CD)]. As a control, 24 healthy individuals and 12 patients with non-IBD diarrheal diseases were tested. Serum anti-CA I and anti-CA II antibodies were quantified by enzyme-linked immunosorbent assay. Anti-CA II antibody was detected in 27.8% of UC patients, whereas anti-CA I antibody was detected in only 5.6% of UC patients. Positive rate of anti-CA II antibody was significantly higher in UC patients as compared to the control. In CD patients and non-IBD diarrheal patients, there were no significant increase in positive rate of either anti-CA I or II antibody. These results suggest that autoimmune responses against CA II may be involved in the pathogenesis of UC, and similar mechanism may participate in the development of pancreatic lesions in UC patients.
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