China Animal Husbandry and Veterinary Medicine ›› 2022, Vol. 49 ›› Issue (11): 4364-4371.doi: 10.16431/j.cnki.1671-7236.2022.11.027

• Preventive Veterinary Medicine • Previous Articles     Next Articles

Effect of E3 Ubiquitin Ligase RNF185 on Replication of Avian Leukemia Virus Subgroup A in vitro

LIU Jing, CHEN Xueyang, ZENG Yang, YANG Yuying   

  1. College of Animal Science, Yangtze University, Jingzhou 434025, China
  • Received:2022-06-16 Online:2022-11-05 Published:2022-11-04

Abstract: 【Objective】 Ring finger protein 185 (RNF185) is a member of Ring family E3 ubiquitin ligases.This study was aimed to explore the effect of chicken-derived RNF185 on the replication of Avian leukemia virus subgroup A (ALV-A) in vitro, and study the effect of chicken-derived RNF185 on the pathogenicity and mediated tumorigenic mechanism of ALV-A.【Method】 Referring to the sequence of RNF185 gene in chicken (accession No.:NP_001007841) published in GenBank, RNF185 overexpression primers and RNF185 single-stranded shRNA were designed, respectively.The RNF185 gene and double-stranded shRNA were synthesized by PCR and cloned into eukaryotic expression vectors psi-flag and interference vector pLKO.1-GFP, respectively.The constructed recombinant plasmids were verified by PCR, double restriction digestion and sequencing, and the CCK-8 kit was used to detect the effect of the recombinant plasmid on the viability of DF-1 cells.104 tissue culture infective dose 50% (TCID50) ALV-A (rHB2015012) virus solution was inoculated into DF-1 cells after RNF185 overexpression and interference, respectively, the cells were harvested at 3, 4 and 5 d after inoculation, and the viral load of ALV-A was detected by Western blotting.【Result】 The RNF185 gene was successfully amplified by PCR and the single-stranded shRNA was annealed to form double-stranded shRNA.The recombinant plasmids psi-flag-RNF185, pLKO.1-RNF185-1 and pLKO.1-RNF185-2 were successfully constructed.Western blotting results showed that the constructed overexpression and interference plasmid could stably express and interfere with RNF185 in DF-1 cells.The CCK-8 results indicated that overexpression and interference of RNF185 did not affect the activity of DF-1 cells.Overexpression of RNF185 could promote the replication of ALV-A in DF-1 cells, and interfere with the expression of RNF185 could inhibit the replication of ALV-A in DF-1 cells.【Conclusion】 This study constructed an overexpression plasmid and an interference plasmid that could highly express and interfere with RNF185 in DF-1 cells.RNF185 had no significant effect on the proliferation of DF-1 cells, confirming that RNF185 could promote the replication of ALV-A (rHB2015012) in vitro.

Key words: ring finger protein 185 (RNF185); Avian leukemia virus subgroup A (ALV-A); virus replication

CLC Number: