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• W2000938340 abstract "OBJECTIVES Anti-S. cerevisiae mannan antibodies (ASCA) are human antibodies associated with Crohn's disease (CD) reacting with Saccharomyces cerevisiae (S. cerevisiae) mannan polymer. As mannan is a complex and variable repertoire of oligomannoses acting as epitopes, we chemically synthesized (Σ) two major oligomannose epitopes, Man α-1,3 Man α-1,2 Man (ΣMan3) and Man α-1,3 Man α-1,2 Man α-1,2 Man (ΣMan4), and then explored how antisynthetic mannoside antibodies (AΣMA) compare with ASCA as markers of CD. METHODS The study involved different cohorts of CD and ulcerative colitis (UC) patients and healthy controls who had been studied previously in several medical centers in Europe, the United States, and North Africa to determine the clinical value of ASCA in terms of differential diagnosis, evolution of indeterminate colitis (IC), and serotype-phenotype correlations. The comparison of AΣMA and ASCA included a total of 1,365 subjects: 772 CD, 261 UC, 43 IC, and 289 controls. RESULTS The specificity of AΣMA was similar to that of ASCA (89%vs 93%), although the sensitivity was lower (38%vs 55%). Unexpectedly, 24% of the CD patients who were negative for ASCA and/or other CD-associated serologic markers were positive for AΣMA. AΣMA were associated with colonic involvement in CD (odds ratio [OR] 1.609, 95% confidence interval [CI] 1.033–2.506, P= 0.03) and were 100% predictive of CD in patients with IC. CONCLUSIONS AΣMA reveal the heterogeneity of the antioligomannose antibody response in CD patients and increase the sensitivity of CD diagnosis when combined with ASCA. The subset of ASCA-negative CD patients diagnosed by AΣMA had preferentially a colonic involvement, which confirms the high predictive value of AΣMA for determining IC evolution toward CD." @default.
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• W2000938340 date "2008-04-01" @default.
• W2000938340 modified "2023-10-16" @default.
• W2000938340 title "Detection of Antisynthetic Mannoside Antibodies (AΣMA) Reveals Heterogeneity in the ASCA Response of Crohn's Disease Patients and Contributes to Differential Diagnosis, Stratification, and Prediction" @default.
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• W2000938340 doi "https://doi.org/10.1111/j.1572-0241.2007.01648.x" @default.
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