巨细胞病毒启动子序列检测的复合实时定量PCR方法的建立

Establishment of a multiplex real time quantitative PCR method for CMV promoter nucleic acid sequences detection

目的：建立和验证用于巨细胞病毒（CMV）启动子序列检测的复合实时定量 PCR 方法。方法以 CMV 启动子序列和小鼠管家基因β肌动蛋白基因的 cDNA 序列为模板分别设计探针和引物，用 SYBR GreenⅠ熔解曲线分析引物扩增的特异性。对反应体系进行系统优化，并验证方法的灵敏度、线性和重复性。结果针对 CMV 启动子序列的上游引物为5′AGACTTGGAAATCCCCGTGAGT3′，下游引物为5′CG-TATTAGTCATCGCTATTACCATGGT3′，探针为5′AACCGCTATCCACGCCCATTGATG3′。针对β肌动蛋白基因的上游引物为5′CCTGAGGCTCTTTTCCAGCC3′，下游引物为5′TAGAGGTCTTTACGGATGT-CAACGT3′，探针为5′TCCTTCTTGGGTATGGAATCCTGTGGC3′。用 CMV 启动子标准品制作的标准曲线，反应效率为100％，相关系数为0．9978，定量范围达到1．5＆#215;102～1．5＆#215;107拷贝，反应体系灵敏度为30拷贝。结论建立了检测 CMV 启动子序列的复合实时定量 PCR 方法。

OBJECTIVE To establish and validate a multiplex real time quantitative PCR method for cyto megalovirus（CMV）pro moter nucleic acid sequence detection.METHODS Probes and primers were designed according to CMV pro moter sequence and mouse β-actin house-keeping gene,the a mpli-fication specificity was analyzed using SYBR Green I dissociation curve.The reaction syste m was opti-mized,the sensitivity,linearity and reproducibility of the method were validated.RESULTS Forward primer sequence for CMV pro moter sequence were 5′AGACTTGGAAATCCCCGTGAGT3′;reverse prim-er sequence were 5′CGTATTAGTCATCGCTATTACCATGGT3′;probe sequence were 5′AACCGC-TATCCACGCCCATTGATG3′. Forward primer sequence for β-actin gene were 5′CCTGAG-GCTCTTTTCCAGCC3′; reverse primer sequence were 5′TAGAGGTCTTTACGGATGTCAACGT3′;probe sequences were 5′TCCTTCTTGGGTATGGAATCCTGTGGC3′.Reaction efficiency of the CMV standard curve reached 100%, correlation coefficient reached 0.9978, quantification margin was between 1 .5 ＆#215;102 and 1 .5 ＆#215;107 copies,and sensitivity of the reaction reached 30 copies.CONCLUSION The multiplex method that could absolutely quantify the copies of CMV pro moter sequence is established.