摘要
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。
Real-time PCR assays based on SYBR Green I for detection of IL-4, IL-6, IL-10 and 13-actin were established us- ing primers derived from porcine Th2-type cytokines （IL-4, IL-6 and IL-10） gene. The assays were highly sensitive and had a detection limit of 1 × 10^1 copies/μL of initial templates. These assays were highly specific and there was single specific melting peak for every cytokine. It was highly reproducible and had a coefficient of variation less than 3 percent for both intra-and inter-assay. The established assays were successfully used to detect IL-4, IL-6 and IL-10 mRNA expression levels in peripheral blood mononuclear cells （PBMCs） in piglets experimentally infected with porcine reproductive and respiratory syndrome virus （PRRSV）. The high sensitivity, specificity and reproducibility of the assays indicated that the SYBR Green I real-time PCR could be used as an effective tool for detection and quantification of Th2-type cytokines.
出处
《中国预防兽医学报》
CAS
CSCD
北大核心
2010年第2期102-107,共6页
Chinese Journal of Preventive Veterinary Medicine
基金
国家973计划项目(2005CB523204)
