Background Patients with systemic lupus erythematosus often have various autoantibodies. The relationship between these antibodies is still poorly understood. The aim of the present study was to observe the anti-SSB a...Background Patients with systemic lupus erythematosus often have various autoantibodies. The relationship between these antibodies is still poorly understood. The aim of the present study was to observe the anti-SSB antibody and anti-dsDNA antibody production profiles following immunization with synthetic SSB peptide alone, DNA alone or co-immunization with these two antigens. Methods SSB 214-225 aa peptide was synthesized by organic chemistry solid-phase peptide synthesis. Rabbits were immunized with the following antigens： synthetic SSB peptide linked with keyhole limpet hemocyanin （KLH）, DNA, SSB plus dsDNA, KLH and PBS. Antibodies were measured by ELISA. Histopathology and direct immufluorescence assays were also applied. Results Anti-SSB and anti-dsDNA antibodies were produced following immunization with SSB peptide and DNA respectively. The level of SSB antibody in the co-immunization group was higher than that of the SSB peptide immunization group. The level of anti-dsDNA antibody in the co-immunization group was, however, lower than that in the DNA immunization group. Meanwhile, the level of anti-SSB antibody was higher than that of anti-DNA antibody in the co-immunization group. No morphological or immunological abnormalities were found in the heart, liver, kidney, spleen or skin tissues. Conclusion Inhibition of anti-dsDNA-antibody was induced by co-immunization with synthesized SSB peptide and DNA, which might explain, at least partly, the mild disease in some LE subsets associated with SSB antibody.展开更多
目的建立一种简便、快速、可靠的检测抗SSB抗体的方法。方法将毕赤酵母菌重组表达的SSB抗原包被于硝酸纤维素(NC)膜上,与待检血清中抗SSB抗体反应后,以胶体金标记的葡萄球菌蛋白A(Staphy lococus protein A,SPA)作为显示剂,与截留的抗SS...目的建立一种简便、快速、可靠的检测抗SSB抗体的方法。方法将毕赤酵母菌重组表达的SSB抗原包被于硝酸纤维素(NC)膜上,与待检血清中抗SSB抗体反应后,以胶体金标记的葡萄球菌蛋白A(Staphy lococus protein A,SPA)作为显示剂,与截留的抗SSB抗体结合,出现肉眼可见的红色斑点。结果本法的敏感性和特异性分别为100%和98.75%,与欧蒙斑点酶免疫法检测结果之间的符合率为99.01%。结论本法快速、简便、准确,具有很好的临床诊断应用前景。展开更多
基金This work was supported by a grant from the National Natural Science foundation of China （No. 30271194）.
文摘Background Patients with systemic lupus erythematosus often have various autoantibodies. The relationship between these antibodies is still poorly understood. The aim of the present study was to observe the anti-SSB antibody and anti-dsDNA antibody production profiles following immunization with synthetic SSB peptide alone, DNA alone or co-immunization with these two antigens. Methods SSB 214-225 aa peptide was synthesized by organic chemistry solid-phase peptide synthesis. Rabbits were immunized with the following antigens： synthetic SSB peptide linked with keyhole limpet hemocyanin （KLH）, DNA, SSB plus dsDNA, KLH and PBS. Antibodies were measured by ELISA. Histopathology and direct immufluorescence assays were also applied. Results Anti-SSB and anti-dsDNA antibodies were produced following immunization with SSB peptide and DNA respectively. The level of SSB antibody in the co-immunization group was higher than that of the SSB peptide immunization group. The level of anti-dsDNA antibody in the co-immunization group was, however, lower than that in the DNA immunization group. Meanwhile, the level of anti-SSB antibody was higher than that of anti-DNA antibody in the co-immunization group. No morphological or immunological abnormalities were found in the heart, liver, kidney, spleen or skin tissues. Conclusion Inhibition of anti-dsDNA-antibody was induced by co-immunization with synthesized SSB peptide and DNA, which might explain, at least partly, the mild disease in some LE subsets associated with SSB antibody.
文摘目的建立一种简便、快速、可靠的检测抗SSB抗体的方法。方法将毕赤酵母菌重组表达的SSB抗原包被于硝酸纤维素(NC)膜上,与待检血清中抗SSB抗体反应后,以胶体金标记的葡萄球菌蛋白A(Staphy lococus protein A,SPA)作为显示剂,与截留的抗SSB抗体结合,出现肉眼可见的红色斑点。结果本法的敏感性和特异性分别为100%和98.75%,与欧蒙斑点酶免疫法检测结果之间的符合率为99.01%。结论本法快速、简便、准确,具有很好的临床诊断应用前景。
