Volume 41 Issue 4
Jul.  2020
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Lei Liu, Da-Wei Song, Guang-Lu Liu, Li-Peng Shan, Tian-Xiu Qiu, Jiong Chen. Hydroxycoumarin efficiently inhibits spring viraemia of carp virus infection in vitro and in vivo. Zoological Research, 2020, 41(4): 395-409. doi: 10.24272/j.issn.2095-8137.2020.037
Citation: Lei Liu, Da-Wei Song, Guang-Lu Liu, Li-Peng Shan, Tian-Xiu Qiu, Jiong Chen. Hydroxycoumarin efficiently inhibits spring viraemia of carp virus infection in vitro and in vivo. Zoological Research, 2020, 41(4): 395-409. doi: 10.24272/j.issn.2095-8137.2020.037

Hydroxycoumarin efficiently inhibits spring viraemia of carp virus infection in vitro and in vivo

doi: 10.24272/j.issn.2095-8137.2020.037
Funds:  This work was supported by the Program for the National Natural Science Foundation of China (31902410), Natural Science Foundation of Ningbo City of China (2019A610419), General Scientific Research Project of Education of Zhejiang Province (Y201839187), Scientific Innovation Team Project of Ningbo (2015C110018), Scientific Research Fund of Ningbo University (XYL19017), and K.C. Wong Magna Fund in Ningbo University
More Information
  • Corresponding author: E-mail: jchen1975@163.com
  • Received Date: 2020-02-10
  • Accepted Date: 2020-04-24
  • Available Online: 2020-05-10
  • Publish Date: 2020-07-18
  • Spring viremia of carp virus (SVCV) causes devastating losses in aquaculture. Coumarin has an advantageous structure for the design of novel antiviral agents with high affinity and specificity. In this study, we evaluated a hydroxycoumarin medicine, i.e., 7-(6-benzimidazole) coumarin (C10), regarding its anti-SVCV effects in vitro and in vivo. Results showed that up to 12.5 mg/L C10 significantly inhibited SVCV replication in the epithelioma papulosum cyprini (EPC) cell line, with a maximum inhibitory rate of >97%. Furthermore, C10 significantly reduced cell death and relieved cellular morphological damage in SVCV-infected cells. Decreased mitochondrial membrane potential (ΔΨm) also suggested that C10 not only protected mitochondria, but also reduced apoptosis in SVCV-infected cells. For in vivo studies, intraperitoneal injection of C10 resulted in an anti-SVCV effect and substantially enhanced the survival rate of virus-infected zebrafish. Furthermore, C10 significantly enhanced antioxidant enzyme activities and decreased reactive oxygen species (ROS) to maintain antioxidant-oxidant balance within the host, thereby contributing to inhibition of SVCV replication. The up-regulation of six interferon (IFN)-related genes also demonstrated that C10 indirectly activated IFNs for the clearance of SVCV in zebrafish. This was beneficial for the continuous maintenance of antiviral effects because of the low viral loads in fish. Thus, C10 is suggested as a therapeutic agent with great potential against SVCV infection in aquaculture.

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