title: Antineutrophil cytoplasmic autoantibodies and anti-Saccharomyces cerevisiae antibodies in inflammatory bowel diseases.
abstract: OBJECTIVE
  Perinuclear antineutrophil cytoplasmic autoantibody is a marker for ulcerative colitis, and anti-Saccharomyces cerevisiae antibody is known to be associated with Crohn's disease. The purpose of this study was to search the value of detecting perinuclear antineutrophil cytoplasmic autoantibody and anti-Saccharomyces cerevisiae antibody for the diagnosis of Turkish inflammatory bowel disease patients.
  
  
  METHODS
  Serum samples were obtained from 80 patients with ulcerative colitis, 61 patients with Crohn's disease and 40 healthy controls. Determination of both anti-Saccharomyces cerevisiae antibody and antineutrophil cytoplasmic autoantibody was performed with the standardized enzyme-linked immunosorbent assay.
  
  
  RESULTS
  In cases with ulcerative colitis, 65% tested seropositive for antineutrophil cytoplasmic autoantibody, whereas the controls showed 2.5% positivity. In cases with Crohn's disease, 63.9% tested seropositive for anti-Saccharomyces cerevisiae antibody, whereas the controls showed 2.5% seropositivity. The combination of a positive anti-Saccharomyces cerevisiae antibody test and a negative antineutrophil cytoplasmic autoantibody yielded a sensitivity and specificity of 32.0% and 97.5%, respectively. The combination of a positive perinuclear antineutrophil cytoplasmic autoantibody and a negative anti-Saccharomyces cerevisiae antibody test yielded a sensitivity and specificity of 44.2% and 97.5%, respectively.
  
  
  CONCLUSIONS
  Both serologic tests may aid in the differential diagnosis of inflammatory bowel disease.
authors.affiliation: Gastroenterology Clinic, Türkiye Yüksek Ihtisas Hospital, Ankara, Turkey.
authors.forename: Z Mesut Yalin
authors.initials: ZM
authors.lastname: Kiliç
authors.forename: Bilge
authors.initials: B
authors.lastname: Tunç
authors.forename: Selime
authors.initials: S
authors.lastname: Ayaz
authors.forename: Levent
authors.initials: L
authors.lastname: Filik
authors.forename: Semra
authors.initials: S
authors.lastname: Aktaş
authors.forename: Erkan
authors.initials: E
authors.lastname: Parlak
authors.forename: Aysel
authors.initials: A
authors.lastname: Ulker
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D019268:Antibodies, Antineutrophil Cytoplasmic / Q000097:blood*; D000908:Antibodies, Fungal / Q000097:blood*; D016022:Case-Control Studies; D003093:Colitis, Ulcerative / Q000097:blood* / Q000150:complications / Q000175:diagnosis; D003424:Crohn Disease / Q000097:blood* / Q000150:complications / Q000175:diagnosis; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D011237:Predictive Value of Tests; D012441:Saccharomyces cerevisiae / Q000276:immunology*; D014421:Turkey
chemical_list: D019268:Antibodies, Antineutrophil Cytoplasmic; D000908:Antibodies, Fungal