Recognition of bactericidal/permeability-increasing protein by perinuclear anti-neutrophil cytoplasmic antibody-positive sera from ulcerative colitis patients: Prevalence and clinical significance

Maurizio Vecchi, A. Sinico, M. B. Bianchi, A. Radice, P. Gionchetti, M. Campieri, R. De Franchis

Research output: Contribution to journalArticle

Abstract

Background: The aim of this study was to evaluate a) the role of bactericidal/permeability-increasing protein (BPI) as a possible antigen determining perinuclear anti-neutrophil cytoplasmic antibody (p-ANCA) reactivity in ulcerative colitis and b) the prevalence and clinical correlates of anti-BPI antibodies in patients with ulcerative colitis on the basis of their p-ANCA status. Methods: p-ANCA and anti-BPI antibodies were evaluated by means of indirect immunofluorescence and enzyme-linked immunosorbent assay methods in a group of 112 ulcerative colitis patients (including 42 patients subjected to proctocolectomy) well defined as far as their clinical features and p-ANCA status. Results: Anti-BPI antibodies were detected in 24% of non-operated patients and were significantly more frequent in p-ANCA-positive patients (32% versus 5% in p-ANCA-negative patients; P <0.015). The prevalence of anti-BPI antibodies was similar in non-operated and operated patients and was high in men, in patients with an extensive and aggressive disease, and in patients developing pouchitis after surgery. Conclusions: These data indicate that BPI is a neutrophil antigen frequently recognized by p-ANCA-positive ulcerative colitis sera. The presence of anti- BPI antibodies appears to identify further immunologic and clinical heterogeneity in ulcerative colitis.

Original languageEnglish
Pages (from-to)1284-1288
Number of pages5
JournalScandinavian Journal of Gastroenterology
Volume33
Issue number12
DOIs
Publication statusPublished - 1998

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Keywords

  • Anti-neutrophil cytoplasmic antibodies
  • Autoantibodies
  • Bactericidal/permeability-increasing protein
  • Inflammatory bowel disease
  • Ulcerative colitis

ASJC Scopus subject areas

  • Gastroenterology

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