›› 2017, Vol. 44 ›› Issue (11): 3287-3293.doi: 10.16431/j.cnki.1671-7236.2017.11.025

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Development of Virus-like Particles Containing African Swine Fever Virus Nucleic Acid Sequence and Its Application in Detection Method

FENG Chun-yan1, DU Fang-yuan1, LIU Dan-dan1, Pershin Andrey2, WANG Cai-xia1, ZHANG Yong-ning1, WU Shao-qiang1, LIN Xiang-mei1   

  1. 1. Institute of Animal Quarantine, China Institute of Inspection and Quarantine, Beijing 100176, China;
    2. All-Russia Research Institute of Animal Health, Yuryevets 600900, Russia
  • Received:2017-05-24 Online:2017-11-20 Published:2017-11-21

Abstract:

African swine fever (ASF) is an infectious disease caused by the African swine fever virus (ASFV). In order to ensure the accuracy and reliability of the test results,it is necessary to develop positive standard control products used in the kit. The study was aimed to develop the virus-like particles containing African swine fever virus (ASFV) nucleic acid sequence and its application in detection method. Fristly,the full-length gene fragment of p72 gene was amplified, and the ASF DNA virus-like particles containing p72 gene was constructed using insect baculovirus system. In order to further validate the reliability of the virus-like particles in the application of the method,DNA nucleic acid was extracted simultaneously with the cultured virus and infected tissue sample and applied in the Real-time quantitative PCR method. The results showed that the virus-like particles prepared by this study could replace the ASFV as a positive control product in the Real-time quantitative PCR method, and could act as quality control during nucleic acid extraction process. In the fluorescent PCR detection kit, the lowest packaging concentration of virus-like particles was 102 TCID50. Further studies had shown that the virus-like particles were also suitable for common PCR and LAMP detection methods, the minimum concentration were 103 and 101 TCID50, respectively. The results of this study would be important for the ASF detection method, promoting the application of the method and ensuring the accuracy and reliability of the test results.

Key words: African swine fever (ASF); reference substance; virus-like particle; detection methods

CLC Number: