碱性磷酸酶直接标记核酸探针检测乙型肝炎病毒DNA  

Establishment and evaluation of the method for detecting HBV DNA in serum using HBV DNA probe labeled directly by alkaline phosphatase

作　　者：陈压西[1] 黄爱龙[1] 齐珍元[1] 单幼兰[1] 孙航[1] 

机构地区：[1]重庆医科大学病毒性肝炎研究所,400010

出　　处：《中华肝脏病杂志》2002年第6期429-431,共3页Chinese Journal of Hepatology

摘　　要：目的 建立快速、特异、灵敏的碱性磷酸酶直接(AlkPhos Direc)标记核酸探针检测血清中乙型肝炎病毒核酸(HBV DNA)方法。方法 应用 AlkPhos DirecTM将碱性磷酸酶直接标记在HBV DNA全基因序列上制备探针,与目标核酸杂交后加入CDP-Star化学发光试剂,用胶片放射自显影检测HBV DNA。同时检测探针的灵敏度和特异性。比较AlkPhos Direc标记HBV DNA探针与地高辛标记的HBV DNA探针检测临床血清标本80份结果,并对70份临床血清标本的荧光定量PCR方法检测的结果与AlkPhos Direc标记HBV DNA探针斑点杂交检测的结果作相关性分析。结果 探针灵敏度至少为10pg,与地高辛探针比较,用AlkPhos Direct标记探针检测方法的灵敏度为100％,特异性为100％,符台率为100％,用HBV DNA荧光定量PCR方法和AlkPhos Direct标记探针核酸斑点定量方法检测的结果进行相关性比较,r=0.98,P<0.01。结论 AlkPhos Direc标记 HBVDNA探针检测血清中HBV DNA方法灵敏、特异,与地高辛标记的HBV DNA探针检测结果完全符合,与HBVDNA荧光定量PCR方法硷侧的结果有良好的相关性。Objective To establish a sensitive and specific technique for detecting HBV DNA in serum using HBV DNA probe labeled directly by alkaline phosphatase (AlkPhos Direc probe). Methods The probe that purified HBV DNA sequence was labeled directly by alkaline phosphatase and chemiluminescent substrate CDP-star for AP was used in the hybridization assay. HBV DNA was detected by autoradiography on the film. The test compared the chemiluminescen dot blot hybridization assay for 80 samples with digoxigenin-labeled HBV DNA probe detective method. The correlation of 70 samples test results between fluorescent quantitative HBV DNA PCR method and dot blot hybridization assay by AlkPhos Direc probe was analysed. Results The sensitivity of the probe labeled directly by alkaline phosphatase was 10 pg at least. The coincidence was 100% compared with digoxigenin-labeled HBV DNA probe detection. A correlation coefficient of HBV DNA quantitative results between fluorescent quantitative HBV DNA PCR (QPCR) method and dot blot hybridization assay by AlkPhos Direc probe was 0.98 (F<0.01). Conclusions The method detecting HBV DNA in serum by HBV DNA AlkPhos Direc probe is sensitive and specific. The results between two methods with AlkPhos Direc and digoxigenin-labeled HBV DNA probe are coincident completely. The correlation of HBV DNA quantitative results between fluorescent QPCR method and dot blot hybridization assay by AlkPhos Direc probe is satisfactory.

关 键 词：碱性磷酸酶 核酸探针 检测 乙型肝炎病毒 DNA 荧光定量PCR法 

分 类 号：R446.5[医药卫生—诊断学]