粪便钙卫蛋白及血清自身抗体联合检测对炎症性肠病的诊断价值

摘要

目的 探讨联合检测血清抗胰腺外分泌腺抗体(PAB)、抗酿酒酵母抗体(ASCA)、抗杯状细胞抗体(GAB)、抗中性粒细胞胞浆抗体(PANCA)及粪便钙卫蛋白(FC)在炎症性肠病(IBD)诊断和鉴别诊断中的价值.方法 收集确诊的克罗恩病(CD)患者107例及溃疡性结肠炎(UC)患者98例作为IBD组,非IBD肠病疾病患者79例作为疾病对照组,用间接免疫荧光法检测血清PANCA、ASCA、GAB和PAB,用双抗体夹心ELISA法检测FC浓度.对3组血清PANCA、GAB、PAB、ASCA及FC检测的数据进行对比分析.结果 205例IBD患者血清PANCA、GAB、PAB、ASCA的阳性率分别为36.1％、29.8％、38.0％、4.9％;IBD组、CD组与UC组FC浓度均高于疾病对照组,差异有统计学意义(P＜0.o1),CD组与UC组间比较无统计学意义(P＞0.05).PANCA在CD和UC组的阳性率分别为8.4％、66.3％;PAB在CD和UC组的阳性率分别为65.4％、8.2％;PAB、PANCA、GAB、ASCA、FC及5项联合在鉴别诊断IBD与非IBD肠道疾病中的敏感性和特异性分别为38.0％、36.1％、29.8％、4.9％、54.1％、63.4％和98.7％、96.2％、94.9％、100％、68.4％、93.7％.5项联合鉴别诊断IBD与非IBD肠道疾病的ROC曲线下面积为0.819;PANCA用于UC鉴别诊断的ROC曲线下面积为0.816;PAB用于CD鉴别诊断的ROC曲线下面积为0.823.结论 GAB为一种IBD相关自身抗体,可用于IBD的辅助诊断;PAB和PANCA分别为CD和UC重要的血清学标记物,对该类疾病诊断具有高度敏感性和特异性;将FC与自身抗体联合对于IBD与非IBD胃肠道疾病的鉴别具有重要意义,但对于区分CD或UC价值不大.%Objective To investigate the values of combined detection of serum pancreas autoantibodies (PAB),anti-saccharomyces cerevisiae antibodies(ASCA),goblet cell autoantibodies(GAB) and antineutrophil cytoplasmic antibodies(PANCA) and fecal calprotectin(FC) in the diagnosis and differential diagnosis of inflammatory bowel diseases(IBD).Methods The serum and feces samples from IBD patients,including 107 with definite Crohn's disease(CD) and 98 with definite ulcerative colitis(UC),and 79 non-IBD patients as the control were collected.Serum PANCA,ASCA,GAB and PAB were detected by an indirect immunofluorescence assay,and FC concentration by double-antibody sandwich ELISA.The results from different patients were compared and analyzed.Results The positive rates of serum PANCA,GAB,PAB and ASCA in 205 IBD patients were 36.1％,29.8％,38.0％ and 4.9％,respectively.The FC concentrations in IBD,CD and UC patients were significantly higher than that in the control(P ＜ 0.01),while there was no statistical difference between CD and UC patients (P ＞ 0.05).The positive rates of PANCA in CD and UC patients were 8.4％ and 66.3％,respectively,while those of PAB in CD and UC patients were 65.4％ and 8.2％,respectively.The sensitivity and specificity of PAB,PANCA,GAB,ASCA,FC and their combination in the differential diagnosis of IBD and non-IBD were 38.0％,36.1％,29.8％,4.9％,54.1％,63.4％ and 98.7％,96.2％,94.9％,100％,68.4％,93.7％,respectively.The area under the ROC of the combination of 5 markers was 0.819 in differentially diagnosing IBD and non-IBD.The area under the ROC of PANCA for the differential diagnosis of UC was 0.816,while that of PAB for the differential diagnosis of CD was 0.823.Conclusion GAB is an autoantibody associated with IBD,which may be helpful for the auxiliary diagnosis of IBD.PAB and PANCA are the important serological markers for the diagnosis of CD and UC,respectively.The combination of FC with PAB,PANCA,GAB and ASCA may be used for the differential diagnosis of IBD and non-IBD,but has little value in distinguishing CD and UC.