实时定量PCR检测白色念珠菌方法学的建立  

Establishment of Detection Methodology of C.albicans by Real-time PCR

作　　者：杜飞[1] 李榕 何睿[1] 曾水芹 段开文[1] 李承文[3] DU Fei;LI Rong;HE Rui;ZENG Shui-qin;DUAN Kai-wen;LI Cheng-wen(Dept. of Stomatology,Affiliated Yan’an Hospital of Kunming Medical University,Kunming Yunnan 650051;Dept. of Stomatology,People’s Hospital of Lincang,Lingcang Yunnan 677000;Dept. of Research Management,The 3rd Affiliated of Kunming Medical University,Kunming Yunnan 650118,China)

机构地区：[1]昆明医科大学附属延安医院口腔科,云南昆明650051 [2]临沧市人民医院口腔科,云南临沧677000 [3]昆明医科大学第三附属医院科研科,云南昆明650118

出　　处：《昆明医科大学学报》2017年第7期55-59,共5页Journal of Kunming Medical University

基　　金：国家自然科学基金资助项目(30860315;81160135);云南省科技厅-昆明医科大学联合专项基金资助项目(2015FA009)

摘　　要：目的采用Taq Man MGB探针技术,建立白色念珠菌实时荧光定量PCR(RQ-PCR)检测方法,为临床白色念珠菌的检测提供快捷的方法.方法以真菌D1/D2区基因的一段高度保守序列为扩增靶序列,合成白色念珠菌特异性引物和探针,提取白色念珠菌标准菌株的DNA,构建含有靶基因片段的重建质粒,扩增后DNA作为标准品,建立白色念珠菌RQ-PCR的标准曲线,并对其重复性、敏感性及特异性等方面进行方法学评价.结果对构建好的克隆质粒测序,插入片段与预期片段序列一致,相似性达100%.白色念珠菌标准曲线为Y=-3.824x+41.36,R2=0.990,该扩增曲线形态良好.结论成功建立了实时荧光定量PCR检测白色念珠菌的方法,其敏感性和特异性较好.Objective To use TaqMan MGB probe technology to establish a detection methodology of Candida albicans(C.albicans)by real-time fluorescence quantitative PCR(RQ-PCR)and to provide a quick method for the detection of candida infection in clinical settings.Methods D1/D2region of candida species which is a highly conserved sequence gene was selected as amplification target sequence and specific primers and probes for C.albicans were synthesized.The DNA of standard strains of C.albicans was extracted and rebuilt plasmid containing the target gene fragment was constructed.The DNA was amplified as a standard to establish the standard curve of C.albicans and methodological evaluation was conducted to identify the linear range,repeatability,sensitivity,specificity and so on.Results After sequencing the recombinant cloning vector,the sequence of the fragment inserted was consistent with the expected sequence,with the similarity of100%.C.albicans standard curve Y=-3.824x+41.36,R2=0.990,which was in good shape and illustrated the detection method of C.albicans by real-time PCR had successfully established.Conclusion The detection method of C.albicans by real-time PCR has better sensitivity and specificity.

关 键 词：实时定量PCR 白色念珠菌 方法学 

分 类 号：R379.4[医药卫生—病原生物学]