IngentaConnect Prevalence and characterization of perinuclear anti-neutrophil cy...

Authors: Sobajima¹; Ozaki¹; Uesugi¹; Osakada²; Shirakawa³; Yoshida³; Nakao¹

Source: Clinical & Experimental Immunology, Volume 111, Number 2, February 1998 , pp. 402-407(6)

Abstract:

In a previous study, we reported that the high mobility group (HMG) non-histone chromosomal proteins HMG1 and HMG2 were novel target antigens of P-ANCA. In this study, we determined the immunodiagnostic value of anti-HMG1/HMG2 antibodies in patients with UC. Sixty sera from patients with UC were tested for reactivity with HMG1 and HMG2 by means of ELISA. Anti-HMG1 antibody was detected in 32% of patients (40% of P-ANCA⁺ patients). Anti-HMG2 antibody was detected in 33% (40% of P-ANCA⁺ patients). Thirty-five percent of sera were positive for antibody to either HMG1 or HMG2 (43% of P-ANCA⁺ patients). P-ANCA⁺ patients expressed anti-HMG1/HMG2 antibodies with significantly greater frequency compared with P-ANCA⁻ patients. Furthermore, the anti-HMG1/HMG2 antibodies were significantly related to disease activity in UC. Sixteen of the 18 UC patients, who had high titres of anti-HMG1 or -HMG2 antibody during the active phase, showed lower titres in the inactive phase. Anti-HMG1/HMG2 antibodies appear to be useful as a marker for disease activity in UC.

Keywords: anti-neutrophil cytoplasmic antibodies; HMG1; HMG2; ulcerative colitis

Document Type: Original article

DOI: 10.1046/j.1365-2249.1998.00491.x

Affiliations: 1: Department of Medicine and Clinical Science, Kyoto University Graduate School of Medicine, Kyoto, 2: Kaneka Corporation, Hyogo, 3: Department of Biological Science and Technology, Science University of Tokyo, Chiba, Japan

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Prevalence and characterization of perinuclear anti-neutrophil cytoplasmic antibodies (P-ANCA) directed against HMG1 and HMG2 in ulcerative colitis (UC)