河南农业科学 ›› 2021, Vol. 50 ›› Issue (1): 142-151.DOI: 10.15933/j.cnki.1004-3268.2021.01.018

• 畜牧·兽医 • 上一篇    下一篇

猪繁殖与呼吸综合征病毒类NADC30毒株与JXA1-R疫苗株荧光定量PCR鉴别检测方法的建立及应用

周新宇1,2,陈鑫鑫2,乔松林2,郭振华2,李睿2,邓瑞广2,张改平1,2   

  1. (1.河南农业大学 动物医学院,河南 郑州 450002;2.河南省农业科学院 动物免疫学重点实验室,河南 郑州 450002)
  • 收稿日期:2020-06-28 出版日期:2021-01-15 发布日期:2021-01-15
  • 通讯作者: 张改平(1960-),男,河南内黄人,中国工程院院士,研究员,博士,主要从事动物免疫学及动物病毒分子致病机制研究。E-mail:zhanggaip@126.com
  • 作者简介:周新宇(1996-),女,河南信阳人,在读硕士研究生,研究方向:预防兽医学。E-mail:1973539304@qq.com陈鑫鑫为同等贡献作者
  • 基金资助:
    河南省农业科学院杰出青年科技基金项目(2020JQ06);河南省生猪产业体系创新团队项目(S2012-06);现代农业(生猪)产业技术体系专项基金项目(CARS-35)

Establishment and Application of Real-time PCR for Differentiation of Porcine Reproductive and Respiratory Syndrome Virus Strains NADC30-like and JXA1-R

ZHOU Xinyu1,2,CHEN Xinxin2,QIAO Songlin2,GUO Zhenhua2,LI Rui2,DENG Ruiguang2,ZHANG Gaiping1,2   

  1. (1.College of Veterinary Medicine,Henan Agricultural University,Zhengzhou 450002,China;2.Key Laboratory of Animal Immunology,Henan Academy of Agricultural Sciences,Zhengzhou 450002,China)
  • Received:2020-06-28 Published:2021-01-15 Online:2021-01-15

摘要: 为鉴别检测猪繁殖与呼吸综合征病毒(PRRSV)类NADC30毒株HNhx和JXA1-R疫苗株,根据类NADC30毒株HNhx和JXA1-R疫苗株非结构蛋白2(Nsp2)基因序列差异,设计特异性引物和探针,建立TaqMan荧光定量PCR和SYBR Green Ⅰ荧光定量PCR检测方法。结果显示,2种方法中,标准品在103~108 拷贝/μL均具有良好线性关系,标准曲线R2值均在0.990以上;基于TaqMan探针法的荧光定量PCR方法,JXA1-R株、HNhx株的最低检出量分别为104、103 拷贝/μL,SYBR Green Ⅰ荧光定量PCR方法的最低检出量均为100 拷贝/μL;重复性分析结果显示,批内和批间试验的变异系数均小于1.5%,呈现出良好重复性。综上,成功建立了鉴别检测类NADC30毒株HNhx和JXA1-R疫苗株的方法,且稳定性好、特异性强,可以为PRRSV的鉴别检测提供技术支持。

关键词: 猪繁殖与呼吸综合征病毒, JXA1-R疫苗株, HNhx毒株, TaqMan荧光定量PCR, SYBR Green Ⅰ荧光定量PCR, 鉴别检测

Abstract: To distinguish JXA1-R vaccine strain and NADC30-like HNhx strain of porcine reproductive and respiratory syndrome virus(PRRSV),TaqMan real-time quantitative PCR and SYBR Green Ⅰ realtime quantitative PCR were established by using specific primers based on the difference of the regions of Nsp2 genes between HNhx and JXA1-R.The results indicated that the standard products had a good linear relationship in the range of 103—108 copies/μL,and the R2 of the standard curves were over 0.990 in two methods.The detection limit of the TaqMan-based fluorescent quantitative PCR was 104copies/μL(JXA1-R) and 103copies/μL(HNhx),respectively.The detection limit of SYBR Green Ⅰ fluorescent quantitative PCR was 100 copies/μL.The reproducibility of intra-and inter-assay displayed that the coefficient of variations was less than 1.5%,the repeatability was good.In conclusion,the method for differentiation of HNhx and JXA1-R was successfully established in this study, which exhibited good stability and high specificity, and provided a new technical support for the differential detection of PRRSV.

Key words: PRRSV, JXA1-R vaccine strain, HNhx strain, TaqMan real-time quantitative PCR, SYBR Green Ⅰ real-time quantitative PCR, Differential detection

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