JIN Li-Ping, PAN Xiao-Yi, LIN Ling-Yun, YAO Jia-Yun, CAO Zheng, YIN Wen-Lin, LAI Ying-Tiao, TAO Jia-Fa, LIU Yi-Han, SHEN Jin-Yu. INFLUENCE OF siRNA TARGETING CYHV-2 ORF57 GENE ON REPLICATION OF CYHV-2 IN CSC CELLS[J]. ACTA HYDROBIOLOGICA SINICA, 2022, 46(4): 537-544. DOI: 10.7541/2021.2020.296
Citation: JIN Li-Ping, PAN Xiao-Yi, LIN Ling-Yun, YAO Jia-Yun, CAO Zheng, YIN Wen-Lin, LAI Ying-Tiao, TAO Jia-Fa, LIU Yi-Han, SHEN Jin-Yu. INFLUENCE OF siRNA TARGETING CYHV-2 ORF57 GENE ON REPLICATION OF CYHV-2 IN CSC CELLS[J]. ACTA HYDROBIOLOGICA SINICA, 2022, 46(4): 537-544. DOI: 10.7541/2021.2020.296

INFLUENCE OF siRNA TARGETING CYHV-2 ORF57 GENE ON REPLICATION OF CYHV-2 IN CSC CELLS

Funds: Supported by National Key R & D Program of China (2019YFD0900103); Key R & D Program Projects of Zhejiang Province (2019C02058)]
  • Received Date: January 06, 2021
  • Rev Recd Date: June 23, 2021
  • Available Online: April 07, 2022
  • Published Date: April 13, 2022
  • Cyprinid herpesvirus 2 (CyHV-2) is the pathogen of herpesviral hematopoietic necrosis of Carassius auratus. It is a double-stranded DNA virus that can infect goldfish, crucian carp and its varieties. This study investigated the effect of CyHV-2 ORF57 on viral replication in Spinal cord tissue cell lines of Carassius auratus gibelio (CSC). Lipofectamine 2000 was used to transfect siRNA. Three pairs of siRNAs of CyHV-2-ORF57 gene were transfected into CSC cells to evaluate the effect of ORF57 on viral replication and cytopathic effect (CPE). Real-time PCR analysis revealed that ORF57-siRNA-2 had the greatest suppression of ORF57 expression with a 33.55% (P<0.01) reduction at 48h associated with the strongest inhibitory effect. All three ORF57-siRNAs delayed the time and intensity of CyHV-2 cytopathogenic effect, with the inhibition time up to 120h. The results of TCID50 showed that ORF57-siRNAs reduced the titer of the virus, and ORF57-siRNA-2 decreased the virus stock solution TCID50 108.487/mL to 106.776/mL. This study show that ORF57 can mediate the CPE and replication rate of CyHV-2. This study provides a reference for the antiviral treatment based on siRNA technology and the construction of low virulent strain of CyHV-2.
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