Acta Agriculturae Zhejiangensis ›› 2022, Vol. 34 ›› Issue (11): 2368-2378.DOI: 10.3969/j.issn.1004-1524.2022.11.06

• Animal Science • Previous Articles     Next Articles

Isolation, identification and analyses for genetic features of one bovine viral diarrhea virus strain from yak

WANG Huihui1,2(), FENG Xili1,2, WANG Mengzhu1,2, ZHAO Zeyang1,2, LI Yicong1,2, PU Feiyang1,2, MA Peng1,2, LI Yong3, GONG Zhenli3, MA Zhongren1, MA Xiaoxia1,*()   

  1. 1. Biomedical Research Center, Northwest Minzu University, Lanzhou 730030, China
    2. College of Life Science and Engineering, Northwest Minzu University, Lanzhou 730010, China
    3. Lanzhou Veterinary Research Institute, Chinese Academy of Agricultural Sciences, Lanzhou 730046, China
  • Received:2021-10-28 Online:2022-11-25 Published:2022-11-29
  • Contact: MA Xiaoxia

Abstract:

In this study, one bovine viral diarrhea virus (BVDV) strain was successfully isolated and termed as GSTZ. By electron microscopy, several 50-60 nm viral particles were observed. GSTZ strain displayed the TCID50 (50% tissue culture infection dose) value of 5.0×106.5 mL-1 as revealed by Karber method. Via reverse transcription-PCR (RT-PCR), the whole open reading frame (ORF) of GSTZ strain was sequenced (whole length of 11 691 nt) and classified into the genotype 1 group at either nucleotide level or synonymous codon usage level. The appearance frequency of A+U was higher than that of G+C in GSTZ ORF, and the synonymous codon usage pattern of GSTZ strain displayed the obvious usage bias in synonymous codons with U/A. It was worth noting that, this strain had a tendency of avoiding the selection of the synonymous codons containing CpG dinucleotides, which strongly suggested that the GSTZ strain might weaken the immune responses from host in order to successfully generate its viral particles. The isolated BVDV strain and the above findings could provide biological materials for the related mechanism study of BVDV, and lay foundations for the analysis of antigen relationship of different genotypes of BVDV and vaccine development.

Key words: bovine viral diarrhoea virus, yak, genotype 1, synonymous codon, cytopathogenic effect

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