Clinical significance of detecting anti-Saccharomyces cerevisiae antibody in Crohn′s disease / 中华消化杂志

ABSTRACT

Objective To evaluate the clinical significance of detecting serum anti-Saccharomyces cerevisiae antibody (ASCA)IgG and IgA in the diagnosis of Crohn′s disease(CD).Methods A total of 51 patients with CD were enrolled as CD group and 22 healthy volunteers as healthy control group.The serum samples of both groups were collected.ASCA-IgG and ASCA-IgA were determined with enzyme linked immunosorbent assay (ELISA).According to Montreal standard,patients with CD were divided into subgroup according to the age of onset (A),lesion (L),clinical behavior (B).The sensitivity, specificity and positive predictive value of both groups were calculated.Chi-square test was performed for count data analysis.Results The sensitivities of ASCA-IgG and ASCA-IgA in CD group were 45 .1 % and 35 .3%,respectively,while in the healthy control group which were 0 and 9.1 %,respectively.There were significant differences between two groups (χ2 =14.49 and 5 .31 ,both P 0.05 ).The sensitivities of ASCA-IgG in CD patients with complications and without complications were 56.3% and 26.3%,respectively,and there was significant difference (χ2 =4.31 ,P <0.05).Conclusions Serum ASCA-IgG is not suitable for population screening,however it has certain value for the differential diagnosis of CD.The clinical value of detecting ASCA-IgG is higher than that of detecting ASCA-IgA.