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Journal of Chinese Pharmaceutical Sciences ›› 2021, Vol. 30 ›› Issue (3): 218-229.DOI: 10.5246/jcps.2021.03.017

• Original articles • Previous Articles     Next Articles

Tolvaptan, an FDA-approved drug, inhibits Zika virus infection both in vitro and in vivo

Xiuxiu Chen1,2, Ronghua Luo1, Zhaiwen Yao1,2, Changbo Zheng3, Qiuju Tang3, Wei Pang1, Fang Wang1,4, Liumeng Yang1, Sidong Xiong2,*(), Yongtang Zheng1,2,*()   

  1. 1 Key Laboratory of Bioactive Peptides of Yunnan Province/Key Laboratory of Animal Models and Human Disease Mechanisms of Chinese Academy of Sciences, Kunming Institute of Zoology, Chinese Academy of Sciences, Kunming, Yunnan 650223, China
    2 KIZ-SU Joint Laboratory of Animal Model and Drug Development, College of Pharmaceutical Sciences, Soochow University, Suzhou 215021, China
    3 School of Pharmaceutical Science & Yunnan Key Laboratory of Pharmacology for Natural Products, Kunming Medical University, Kunming, Yunnan 650500, China
    4 Faculty of Basic Medicine, Kunming University of Science and Technology, Kunming, Yunnan 650500, China
  • Received:2020-08-07 Revised:2020-09-20 Accepted:2020-11-25 Online:2021-03-29 Published:2021-03-29
  • Contact: Sidong Xiong, Yongtang Zheng

Abstract:

As a previously neglected member of flavivirus, Zika virus (ZIKV) has recently emerged and caused a global health concern because of its link to microcephaly and other congenital defects. Currently, no anti-ZIKV vaccine or therapy is commercially available. In this drug-screening study, tolvaptan, an FDA-approved drug, was identified to possess the activity against ZIKV strains of Asian lineage with low cytotoxicity using plaque and MTT assays. The anti-ZIKV activity of tolvaptan was also demonstrated using virus yield reduction assay and Western blotting analysis. Time-of-drug-addition assay showed that tolvaptan exerted its anti-ZIKV activity between 6 and 14 h post-ZIKV inoculation, concurrent with the post-entry events of ZIKV life cycle. Tolvaptan also exhibited inhibitory effects on ZIKV strains of African lineage, indicating that its anti-ZIKV activity was not strain dependent. Notably, tolvaptan could also reduce ZIKV-induced mortality in infected mice. Overall, these results suggested that tolvaptan was a potential therapeutic candidate against ZIKV that is worth further evaluation.

Key words: Zika virus, Tolvaptan, Antiviral, Microcephaly, Flavivirus

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