实时荧光定量Taqman探针法检测线粒体基因1555 A》G突变

目的 建立以实时荧光定量Taqman探针技术检测线粒体DNA 1555A>G突变的方法,实现更快速、简便、准确筛查这一突变的目标.方法 设计针对线粒体DNA 1555A>G突变的Taqman探针和引物,摸索建立稳定的检测方法,同时进行可靠性验证.从解放军总医院聋病分子诊断中心耳聋DNA库选取标本132例,遵循双盲法原则,分别以实时荧光定量Taqman普通探针法、试剂盒法和直接测序法检测线粒体DNA 1555A>G突变,将三种方法 检测的结果 进行比对.结果 132例耳聋病例经实时荧光定量Taqman普通探针法检测发现线粒体DNA 1555A>G突变阳性患者32例,阴性100例,与试剂盒法和直接测序法检测结果 完全相符,未发现假阳性和假阴性.结论 实时荧光定量Taqman探针技术检测线粒体DNA 1555A>G突变的方法 具有检测结果 准确直观、简单省时(反应时间由原来的最快6 h缩短到1.5 h),特异性强,敏感性高的优点,适用于对母系遗传性耳聋线粒体DNA 1555A>G突变的大规模筛查或氨基糖甙类抗生素应用前预防性检测.

Real-time Taqman probe technique system for detecting the MtDNA 1555 A>G mutation

Objective To establish a Real-time Taqman probe technique system to detect the mtDNA 1555A > G mutation in deaf population. Methods Primers and Taqman probes for mtDNA 1555A > G mutation were designed and synthesized. The technique system for detecting mtDNA 1555A > G mutation using Real-time Taqman probes was established. Then the reliability of the technique was tested in 132 patients with severe to profound hearing loss who were detected for the mtDNA 1555A > G mutation by sequencing, Kit method and Real-time Taqman probe technique at the same time. Finally, the results by the above three ways were compared. Results Thirty-two cases with mtDNA 1555A > G mutation were found by the technique of Real-time Taqman probe. These findings coincided with the results from sequencing and Kit method completely. Both the false positive rate and the false negative rate were zero. Conclusions The technique possesses the merits of accuracy, conveniency, high sensitivity, high specificity and intuitionistic results, etc. Importantly, the Real-time Taqman probe technique only needs 1.5 hours to detect the 1555A > G mutation and it saves 4. 5 hours for one reaction compared with the Kit method popularly used nowadays. The technique system of detecting mtDNA 1555A > G mutation is reliable. It's suitable for large-scale detecting and preventive diagnosis of mtDNA 1555A > G mutation.