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中国农学通报 ›› 2024, Vol. 40 ›› Issue (36): 156-164.doi: 10.11924/j.issn.1000-6850.casb2024-0205

• 畜牧·动物医学·蚕·蜂 • 上一篇    

猪伪狂犬病毒gB蛋白间接化学发光抗体检测方法的建立

向国庆1,2(), 宋帅1, 温肖会1, 吕殿红1, 陈玉婷1, 连聪1, 贾春玲1, 顾有方2, 罗胜军1()   

  1. 1 广东省农业科学院动物卫生研究所/广东省畜禽疫病防治研究重点实验室/农业农村部兽用药物与诊断技术广东科学观测实验站,广州 510640
    2 安徽科技学院动物科学学院/动物营养调控与健康安徽省重点实验室,安徽凤阳 233100
  • 收稿日期:2024-03-28 修回日期:2024-07-29 出版日期:2024-12-25 发布日期:2024-12-23
  • 通讯作者:
    罗胜军,男,1974年出生,安徽望江人,副研究员,硕士,主要从事动物疫病防控与监测研究。通信地址:510640 广东省农业科学院动物卫生研究所,E-mail:
  • 作者简介:

    向国庆,男,1998年出生,湖南怀化人,硕士,研究方向:动物疫病与防控。通信地址:510640 广东省农业科学院动物卫生研究所,E-mail:

  • 基金资助:
    猪禽种业全国重点实验室开放课题“基于自然语言处理技术的生猪全景组学数智化集成系统开发和应用”(2023QZ-NK14); 广东省科技计划项目“广东省动物疫病野外科学观测研究站项目”(2021B1212050021)

Establishment of an Indirect Chemiluminescent Antibody Detection Method for Porcine Pseudorabies Virus gB Protein

XIANG Guoqing1,2(), SONG Shuai1, WEN Xiaohui1, LV Dianhong1, CHEN Yuting1, LIAN Cong1, JIA Chunling1, GU Youfang2, LUO Shengjun1()   

  1. 1 Institute of Animal Health, Guangdong Academy of Agricultural Sciences/Guangdong Provincial Key Laboratory of Livestock and Poultry Disease Prevention/Guangdong Provincial Scientific Observation and Experiment Station of Veterinary Drugs and Diagnostic Technology, Ministry of Agriculture and Rural Affairs, Guangzhou 510640
    2 Anhui Province Key Laboratory of Animal Nutrition Regulation and Health/ College of Animal Science, Anhui Science and Technology University, Fengyang, Anhui 233100
  • Received:2024-03-28 Revised:2024-07-29 Published:2024-12-25 Online:2024-12-23

摘要:

研究旨在建立一种快速检测猪伪狂犬病毒(Pseudorabies virus,PRV)gB蛋白间接CLIA抗体检测方法,以期为猪伪狂犬病(Pseudorabies,PR)的防控和规模化猪群疫苗免疫水平评估提供技术支持。本研究将羧基磁珠与重组gB蛋白进行偶联反应形成免疫磁珠,利用全自动化学发光仪对各项反应条件进行优化;选用6种不同浓度的标准品绘制标准曲线;通过绘制ROC曲线确定阴阳性判定标准;初步完成方法建立后分别对其特异性、敏感度、重复性、符合率进行评估。结果显示磁珠偶联最佳pH 6.0,蛋白偶联最佳浓度为40 μg/mL,10% BSA为最优封闭剂,酶标抗体最佳稀释度为1:20000,血清反应时间为5 min,酶标抗体反应时间为10 min,预激发液反应时间为5 min,最终绘制出一条R2=0.9987的标准曲线,同时将判定标准定为:≥16.78 U为阳性,<16.78 U则为阴性。方法学评估中与7种猪类病原的阳性血清均无交叉反应,敏感度略高于商业化试剂盒,批内批间系数均小于10%,与商业化ELISA试剂盒比对总符合率为98.9%。本研究建立的猪伪狂犬病毒gB蛋白间接化学发光抗体检测方法可用于PR流行病学调查及疫苗免疫水平评估,为后续试剂盒研发提供理论参考。

关键词: 猪伪狂犬病毒, 重组gB蛋白, 化学发光, 抗体, 免疫分析, 标准曲线, ROC曲线

Abstract:

The aim of this study is to establish a rapid indirect CLIA antibody detection method for porcine pseudorabies virus gB protein, in order to provide technical support for the prevention and control of porcine pseudorabies disease and the evaluation of vaccine immunization level in large-scale pig herds. In this study, carboxylated magnetic beads were coupled with recombinant gB protein to form immunomagnetic beads, and the reaction conditions were optimized by using a fully automated chemiluminescence instrument; six different concentrations of standards were used to draw the standard curves; the negative and positive determination criteria were determined by drawing ROC curves; and the specificity, sensitivity, reproducibility, and compliance were evaluated after the preliminary establishment of the method. The results showed that the optimal pH for magnetic bead coupling was 6.0, the optimal concentration for protein coupling was 40 μg/mL, 10% BSA was the optimal sealant, the optimal dilution of enzyme-labeled secondary antibody was 1:20000, the serum reaction time was 5 min, the enzyme-labeled antibody reaction time was 10 min, and the pre-stimulation solution reaction time was 5 min. Finally, a standard curve with R2=0.9987 was drawn, and at the same time the judgment criteria were set as follows: ≥16.78 U was judged as positive, and <16.78 U was judged as negative. In the methodological evaluation, there was no cross-reactivity with the positive sera of 7 porcine pathogens, and the sensitivity was slightly higher than that of the commercial kits, with intra-batch and inter-batch coefficients of less than 10%, and the total compliance rate with the commercial ELISA kits was 98.9%. The indirect chemiluminescent antibody detection method for porcine pseudorabies virus gB protein established in this study can be used for epidemiological investigation of PR and assessment of vaccine immunization level, and provides theoretical reference for the development of subsequent kits.

Key words: porcine pseudorabies virus, recombinant gB protein, chemiluminescence, antibody, immunoassay, standard curve, ROC curve