Acta Veterinaria et Zootechnica Sinica ›› 2025, Vol. 56 ›› Issue (11): 5770-5777.doi: 10.11843/j.issn.0366-6964.2025.11.034

• Preventive Veterinary Medicine • Previous Articles     Next Articles

Preparation of N-protein Gene Armor RNA Control for Infectious Bronchitis Virus Nucleic Acid Detection

XIONG Yaoyu1,2(), LIU Dan1(), GAO Jianshuai1, LI Huitong1, ZHANG Boyuan1, DING Jiabo1, JIANG Hui1, FAN Xuezheng1, SHEN Qingchun1,*()   

  1. 1. Key Laboratory of Animal Biosafety Risk Prevention and Control (North) of Ministry of Agriculture and Rural Affairs, Institute of Animal Sciences of CAAS, Beijing 100193, China
    2. College of Animal Science and Technology, Gansu Agricultural University, Lanzhou 730070, China
  • Received:2024-09-06 Online:2025-11-23 Published:2025-11-27
  • Contact: SHEN Qingchun E-mail:616203596@qq.com;1465512558@qq.com;shenqingchun@caas.cn

Abstract:

The objective of this study is to develop a quality-controled product that can be used in the RNA detection of infectious bronchitis virus (IBV). The relatively conserved N protein gene of IBV was selected as the target sequence, and it was cloned into the vector pET-28a(+) with the MS2 phage capsid protein gene and packaging site sequence, and the RNA containing the N protein gene sequence of IBV was obtained by induction expression and purification, and its physical characteristics were observed by electron microscopy, and the copy number was accurately quantified by digital PCR. The real-time RT-PCR method introduced in the national standard GB/T23197—2022 was used to verify the detection of purified armor RNA, and the RNase enzyme resistance and storage stability were verified as well. The armored RNA containing IBV N gene was successfully constructed, which was resistant to the degradation of RNase enzyme and could be stably stored at 37℃ for above 15 days. The developed armor RNA has the potential to become a positive control product for IBV, which can realize the quality control of the whole process of RNA virus detection.

Key words: avian infectious bronchitis, protein N, quality control sample, nucleic acid detection, armored RNA

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