畜牧兽医学报 ›› 2025, Vol. 56 ›› Issue (7): 3555-3560.doi: 10.11843/j.issn.0366-6964.2025.07.047

• 研究简报 • 上一篇    

用于非洲猪瘟病毒多靶标核酸检测的DNA假病毒制备及定量

邓俊花1,2(), 李昊轩1,2, 陈冬杰1,2, 吕继洲1,2, 王晶晶1,2, 张舟1,2, 袁向芬1,2, 魏方1,2, 吴绍强1,2,*()   

  1. 1. 中国检验检疫科学研究院,北京 100176
    2. 国家市场监督管理总局技术创新中心(动植物产品质量与安全),北京 100176
  • 收稿日期:2024-09-03 出版日期:2025-07-23 发布日期:2025-07-25
  • 通讯作者: 吴绍强 E-mail:dengqifei-198825@163.com;sqwu@sina.com
  • 作者简介:邓俊花(1980-),女,山东高唐人,副研究员,硕士,主要从事重大动物疫病检测、标准物质研究,E-mail: dengqifei-198825@163.com;Tel:010-53897668
  • 基金资助:
    国家重点研发技术项目(2022YFD1800605)

Preparation and Quantification of DNA Pseudovirus with Multi-Target Nucleic Acid Detection for African Swine Fever Virus

DENG Junhua1,2(), LI Haoxuan1,2, CHEN Dongjie1,2, LV Jizhou1,2, WANG Jingjing1,2, ZHANG Zhou1,2, YUAN Xiangfen1,2, WEI Fang1,2, WU Shaoqiang1,2,*()   

  1. 1. Chinese Academy of Inspection and Quarantine, Beijing 100176, China
    2. Technology Innovation Center of Animal and Plant Product Quality, Safety and Control, State Administration for Market Regulation, Beijing 100176, China
  • Received:2024-09-03 Online:2025-07-23 Published:2025-07-25
  • Contact: WU Shaoqiang E-mail:dengqifei-198825@163.com;sqwu@sina.com

摘要:

本研究旨在研制一种全程质控非洲猪瘟病毒(ASFV)核酸检测、避免质粒交叉污染的DNA假病毒。将ASFV B646L/CD2v/MGF505-1R/MGF360-12L 4种检测关键基因及EGFP基因共构建于杆状病毒的转移载体pFastBacTM Dual中,转化形成重组Bacmid pFastBac-EGFP-ASFV,转染至sf21细胞,包装产生ASFV重组杆状病毒。结果显示:通过荧光倒置显微镜观察,表达的EGFP蛋白绿色荧光信号指示成功获取AcMNPV-EGFP-ASFV病毒;重组杆状病毒基因组溯源分析,ASFV B646L/CD2v/MGF505-1R/MGF360-12L基因序列满足现行检测方法质控需求;ASFV质控品均匀、稳定,-20 ℃保存至少可稳定24个月。采用ddPCR定量为4.09×103 copies·μL-1。本研究非洲猪瘟病毒DNA假病毒的制备,为非洲猪瘟疫情监测提供了新的技术支撑。

关键词: 非洲猪瘟病毒, DNA假病毒, 定量

Abstract:

The study aims to develop a DNA pseudovirus with full quality control and avoiding plasmid cross-contamination in nucleic acid detection for African swine fever virus (ASFV). The B646L/CD2v/MGF505-1R/MGF360-12L key-genes of ASFV and EGFP gene were co-combined into the baculovirus transfer vector pFastBacTMDual. The Bacmid pFastBac-EGFP-ASFV was formed by transformation. The Bacmid was transfected into sf21 cells and packaged to produce AcMNPV-EGFP-ASFV. The green fluorescence signal of EGFP protein expressed indicated that AcMNPV-EGFP-ASFV was preparated successfully. Genome traceability analysis of the AcMNPV-EGFP-ASFV showed that the ASFV target gene sequence was met the requirements of current detection methods. The ASFV quality control product is uniform and stable, and is stably stored at -20 ℃ for at least 24 months. The quantification is 4.09×103 copies·μL-1 using ddPCR. The preparation of ASFV DNA pseudovirus provides a new technical support for the monitoring of the African swine fever.

Key words: African swine fever virus, DNA pseudovirus, quantification

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