【摘要】 目的观察混合重组抗原用于血吸虫病诊断的价值。方法采用亲和层析法制备纯化的日本血吸虫23kDa膜蛋白分子大亲水肽段(SjC23HD)、21.7kDa膜蛋白(SjC21.7)和日本血吸虫虫卵毛蚴抗原(SjCMP10),采用酶联免疫吸附法对不同包被量的可溶性虫卵抗原、单个重组抗原、多个混合重组抗原检测血吸虫病血清抗体效果进行了比较。结果分别使用2.5μg/ml和7.5μg/ml的可溶性虫卵抗原包被酶标板,检测同一组血吸虫病人血清抗体的效果相同,但使用相同包被量的单一重组蛋白抗原及混合重组蛋白抗原检测同一组血吸虫病人血清抗体,混合重组蛋白抗原检测血清抗体的吸光度明显高于单一重组蛋白抗原,两者差异有显著性。用可溶性虫卵抗原与混合重组抗原同时检测39份急性血吸虫病人血清、80份慢性病人血清、27份晚期病人血清,两者阳性检出率相似。混合重组抗原检测20份华支睾吸虫病人血清及40份健康人血清无交叉反应和假阳性反应,特异性比可溶性重组抗原高。结论建立混合重组抗原诊断血吸虫病的方法,有助于提高重组抗原用于血吸虫病诊断的效能。更多还原

【Abstract】 Objective To investigate the value of mix recombinant antigen in schistosomiasis diagnosis. Methods The recombinant antigens of SjC23 (HD),SjC21.7 and SjCMP10 were expressed in vitro and purified by the affinity chromatography method. The efficacies of soluble egg antigen (SEA),single recombinant antigen and mix recombinant antigen for schistosomiasis diagnosis by Enzyme-linked Immunosorbent Assay were compared. Results The diagnostic efficacy was the same when the antibody IgG of the same group sera of schistosomiasis was detected by different quantities of 2.5 μg/ml and 7.5 μg/ml of SEA immobilized on microplate, and their absorbency A was the same, but there was a significant difference in the diagnostic efficacies between single recombinant antigen and mix recombinant antigen when the antibody IgG of the same group sera of schistosomiasis was detected by the same quantity of single recombinant antigen or mix recombinant antigen immobilized on microplate, the absorbency A of mix antigen reacted with the sera of schistosomiasis was significant higher than that of the single recombinant. The positive rates were very similar when 39 sera of acute schistosomiasis,80 sera of chronic schistosomiasis and 27 sera of advanced schistosomiasis were detected by SEA or mix recombinant antigen by ELISA in the same time. No cross-reaction presented when 20 clonorchiasis sera were detected by the mix recombinant antigen and no false positive presented when 40 of healthy sera were detected by the mix recombinant antigen. Conclusion The schistosomiasis diagnostic method by using the mix recombinant antigen has been established, which is helpful for improving the efficacy of schistosomiasis diagnosis.更多还原