Abstract
Inflammatory bowel diseases are uncommon in the Chinese, but the incidence is rising. Their differentiation from infective colitis is often not clear-cut and diagnosing inflammatory bowel diseases can be difficult in Asia. We have studied Chinese patients with ulcerative colitis (N=19) and Crohn's disease (N=12) for anti-neutrophil cytoplasmic antibodies (ANCA) by indirect immunofluorescence (IIF) and enzyme-linked immunosorbent assays (ELISA). Patients with enteric fever (N=29) and irritable bowel syndrome (N=24) were recruited as controls. Seventy-three percent of ulcerative colitis patients exhibited either p-ANCA (31%) or c-ANCA (42%) by IIF. Twenty-five percent of Crohn's disease patients were found to be p-ANCA positive. However, these ANCA were nonreactive to anti-α granule, antiproteinase 3, antimyeloperoxidase, or antilactoferrin. All positive patients had extensive colitis. Sera collected from patients suffering from enteric fever and irritable bowel syndrome were negative for ANCA by IIF and ELISA. We concluded that the detection of ANCA is helpful in diagnosing inflammatory bowel diseases. Further attempts to characterize these autoantibodies are needed.
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This study was partly supported by the Croucher Foundation (grant 1634-29) and Research Grant Committee (grant CUHK/34/92M).
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Sung, J.Y., Chan, F.K.L., Lawton, J. et al. Anti-neutrophil cytoplasmic antibodies (ANCA) and inflammatory bowel diseases in Chinese. Digest Dis Sci 39, 886–892 (1994). https://doi.org/10.1007/BF02087438
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DOI: https://doi.org/10.1007/BF02087438