In this study,a RT-PCR assay for rapid detection of duck hepatitis virus type 1( DHV-1) was established in the presence of a pair of primers designed based on vp1 gene sequence,using the genomic RNA of DHV-1 or other ...In this study,a RT-PCR assay for rapid detection of duck hepatitis virus type 1( DHV-1) was established in the presence of a pair of primers designed based on vp1 gene sequence,using the genomic RNA of DHV-1 or other common viruses as the template. The template was serially diluted 10-fold to determine the reaction sensitivity. Finally,seven liver samples of ducks with suspected DHV-1 infection,which were collected from different regions of Jiangsu Province,were detected with this method. The results showed that a DNA fragment of about 360 bp was specifically amplified with the RT-PCR system,and the detection limit was1 fg/μL. The detection rate of clinical samples with this method was 100%. The results revealed that the RT-PCR system which had high specificity and high sensitivity in the detection of DHV-1 was successfully established.展开更多
为探讨PRRSV感染后机体的体液免疫应答、从分子水平深入研究PRRSV的免疫机制,本研究针对Th2型细胞因子IL-4、IL-6、IL-10以及看家基因β-actin的基因序列分别设计一对特异性引物,构建含有各自引物扩增序列的重组质粒作为阳性标准品,建...为探讨PRRSV感染后机体的体液免疫应答、从分子水平深入研究PRRSV的免疫机制,本研究针对Th2型细胞因子IL-4、IL-6、IL-10以及看家基因β-actin的基因序列分别设计一对特异性引物,构建含有各自引物扩增序列的重组质粒作为阳性标准品,建立了检测IL-4、IL-6、IL-10及β-actin的SYBR Green Ⅰ real-time PCR方法。该方法线性关系好,各种细胞因子及β-actin标准曲线的相关系数均达到0.997以上;敏感性高,初始模板的检出下限均达到1×101copies/μL;特异性强,扩增产物形成单一的特异性熔解峰;重复性好,组内与组间的变异系数均小于3%。应用所建立的方法对猪繁殖与呼吸综合征病毒(PRRSV)感染仔猪外周血单个核细胞(PBMC)中IL-4、IL-6和IL-10mRNA的表达水平进行了检测。结果表明,本研究建立的real-timePCR检测方法灵敏度高、特异性强、重复性好,可以用于猪Th2型细胞因子的检测及定量分析。展开更多
以猪圆环病毒1型ORF1基因为靶基因,建立了可对其准确定量的微滴数字PCR(droplet digital PCR,ddPCR)方法。对ddPCR反应中的探针浓度进行了优化。结果显示:ddPCR反应中的最佳探针浓度为250nmol/L;ddPCR方法线性相关系数(R2)为0.999,呈良...以猪圆环病毒1型ORF1基因为靶基因,建立了可对其准确定量的微滴数字PCR(droplet digital PCR,ddPCR)方法。对ddPCR反应中的探针浓度进行了优化。结果显示:ddPCR反应中的最佳探针浓度为250nmol/L;ddPCR方法线性相关系数(R2)为0.999,呈良好的线性关系;检测限为7.8copies/20μL;变异系数为2.7%;与其他病毒无交叉反应。通过对临床样品的检测,检测结果与实时荧光PCR结果一致。结果表明:新建立的ddPCR方法敏感性高、特异性强,可用于猪圆环病毒1型的定量检测。展开更多
基金Supported by Natural Science Research Program of the Higher Education Institutions of Jiangsu Province(16KJB230004)"Six Talent Peaks" Project of Jiangsu Province(NY-023,10410015002)+1 种基金Anhui Science and Technology Project(1201c0602006)Jiangsu Province Excellent Scientific and Technological Innovation Tean
文摘In this study,a RT-PCR assay for rapid detection of duck hepatitis virus type 1( DHV-1) was established in the presence of a pair of primers designed based on vp1 gene sequence,using the genomic RNA of DHV-1 or other common viruses as the template. The template was serially diluted 10-fold to determine the reaction sensitivity. Finally,seven liver samples of ducks with suspected DHV-1 infection,which were collected from different regions of Jiangsu Province,were detected with this method. The results showed that a DNA fragment of about 360 bp was specifically amplified with the RT-PCR system,and the detection limit was1 fg/μL. The detection rate of clinical samples with this method was 100%. The results revealed that the RT-PCR system which had high specificity and high sensitivity in the detection of DHV-1 was successfully established.
文摘为探讨PRRSV感染后机体的体液免疫应答、从分子水平深入研究PRRSV的免疫机制,本研究针对Th2型细胞因子IL-4、IL-6、IL-10以及看家基因β-actin的基因序列分别设计一对特异性引物,构建含有各自引物扩增序列的重组质粒作为阳性标准品,建立了检测IL-4、IL-6、IL-10及β-actin的SYBR Green Ⅰ real-time PCR方法。该方法线性关系好,各种细胞因子及β-actin标准曲线的相关系数均达到0.997以上;敏感性高,初始模板的检出下限均达到1×101copies/μL;特异性强,扩增产物形成单一的特异性熔解峰;重复性好,组内与组间的变异系数均小于3%。应用所建立的方法对猪繁殖与呼吸综合征病毒(PRRSV)感染仔猪外周血单个核细胞(PBMC)中IL-4、IL-6和IL-10mRNA的表达水平进行了检测。结果表明,本研究建立的real-timePCR检测方法灵敏度高、特异性强、重复性好,可以用于猪Th2型细胞因子的检测及定量分析。
文摘以猪圆环病毒1型ORF1基因为靶基因,建立了可对其准确定量的微滴数字PCR(droplet digital PCR,ddPCR)方法。对ddPCR反应中的探针浓度进行了优化。结果显示:ddPCR反应中的最佳探针浓度为250nmol/L;ddPCR方法线性相关系数(R2)为0.999,呈良好的线性关系;检测限为7.8copies/20μL;变异系数为2.7%;与其他病毒无交叉反应。通过对临床样品的检测,检测结果与实时荧光PCR结果一致。结果表明:新建立的ddPCR方法敏感性高、特异性强,可用于猪圆环病毒1型的定量检测。
