目的 探讨用重组表达的侧链二氧酸脱氢酶复合物E2亚单位(BCOADC—E2)检测M2抗体,以早期诊断原发性胆汁性肝硬化(PBC)。方法 重组表达BCOADC—E2,采用酶联免疫吸附试验(ELISA)和免疫印迹法(IBT)来检测PBC患者的M2抗体,并以健康体检者、自身免疫病患者、其他非胆汁性肝硬化患者为对照组。结果 60例肝病患者血清中检测出抗BCOADC—E2抗体阳性33例,阴性者为27例,阳性率为55%,而健康体检者和疾病对照组血清中M2抗体检测均为阴性。结论 采用重组表达的人侧链二氧酸脱氢酶复合物E2亚单位检测M2抗体,有一定的特异性,对于早期诊断PBC有一定的辅助参考作用。
Objective To detect anti-M2 autoantibody using recombinant BCOADC-E2. Methods We purified recombinant BCOADC-E2 by Ni^2+ affinity chromatography column and then detect anti-M2 autoantibody in the sera of patients with primary biliary cirrhosis (PBC) by Western blot test (WBT) and enzyme linked immunosorbent assays (ELISA). Results Among 60 sera from PBC patients, 33 were positive, all of controls were negative. Conclusion The recombinant BCOADC-E2 can be used to detect anti-M2 autoantibody specifically and sensitively. It is helpful for the diagnosis of PBC.