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AB0186 ASCA (anti-saccharomyces cerevisae antibody) in scleroderma
  1. A Fedrigo,
  2. TAFG dos Santos,
  3. A Bortoluzzi,
  4. T Skare,
  5. R Nisihara
  1. Rheumatology Unit, Hospital Universitário Evangelico de Curitiba, Curitiba, Brazil


Background The majority of Scleroderma (SSc) patients have gastrointestinal involvement. Motility is usually compromised but few studies address permeability changes in the intestinal wall. ASCA is an antibody direct against mannan in the cell wall of Saccharomyces cerevisiae, the baker's yeast that is found mainly when the small bowel is involved in Chron's disease. Nowadays ASCA is regarded more as a marker of increased gastrointestinal permeability than as a serological autoimmune marker of intestinal inflammatory disease. ASCA levels (anti-Sacharomyces Cerevisae antibodies) are associated with increased intestinal permeability.

Objectives At present we study the presence of ASCA in the serum of SSc patients aiming to know if there is increased intestinal permeability in this disease and if this is related to any clinical, demographic and treatment data.

Methods Seventy four SSc patients and 57 healthy controls were studied for ASCA (IgG and IgA) positivity by ELISA. ASCA positivity was associated with demographic, clinical, severity index (Medsger score) and serological data in SSc patients.

Results ASCA IgG levels were high in 26/74 (43.7%) patients from SSc group and 1/57 (5.2%) of controls (p<0.001); IgA ASCA was high in 12/74 (16.2%) from SSc group and 3/57 (1.7%) of controls (p=0.006). In univariated analysis IgG ASCA high levels associated positively with African background (p<0.0001) and negatively with anticentromere antibodies (p=0.013); ASCA IgA had a negative association with Medsger score (p=0.05). In multivariated analysis IgG ASCA associated independently only with African ethnic background.

Conclusions Positivity for IgG and IgA ASCA are higher among scleroderma patients than controls. African descendants have more positivity for IgG ASCA and ASCA IgA were less commonly seen in patients with more severe disease.


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Disclosure of Interest None declared

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