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Zhou L, Zhou J, Chen T, Chi X, Liu X, Pan S, Chen W, Wu T, Lin T, Zhang X, Li YP, Yang W. Identification of Ascomycin against Zika virus infection through screening of natural product library. Antiviral Res 2021; 196:105210. [PMID: 34801589 DOI: 10.1016/j.antiviral.2021.105210] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/10/2021] [Revised: 10/27/2021] [Accepted: 11/16/2021] [Indexed: 10/19/2022]
Abstract
Zika virus (ZIKV) infection could lead to Guillain-Barré syndrome in adults and microcephaly in the newborns from infected pregnant women. To date, there is no specific drug for the treatment of ZIKV infection. In this study, we sought to screen inhibitors against ZIKV infection from a natural product library. A ZIKV replicon was used to screen a library containing 1680 natural compounds. We explored the antiviral mechanism of the compound candidate in vitro and in vivo infection models. Ascomycin, a macrolide from Streptomyces hygroscopicus, was identified with inhibitory effect against ZIKV in Vero cells (IC50 = 0.11 μM), hepatoma cell Huh7 (IC50 = 0.38 μM), and glioblastoma cell SNB-19 (IC50 = 0.06 μM), far below the cytotoxic concentrations. Mechanistic study revealed that Ascomycin suppressed ZIKV RNA replication step during the life cycle and the regulation of calcineurin-NFAT pathway maybe involved in this inhibitory effect, independent of innate immunity activation. Moreover, we found that Ascomycin also inhibited the infection of other Flaviviridae members, such as hepatitis C virus and dengue virus. Ascomycin reduced ZIKV load in blood by up to 3500-fold in A129 mice. Meanwhile, the infection in the mice brain was undetectable by immunohistochemistry staining. Together, these findings reveal a critical role of Ascomycin in the inhibition of ZIKV and related viruses, facilitating the development of novel antiviral agents.
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Affiliation(s)
- Liang Zhou
- Institute of Human Virology, Zhongshan School of Medicine, and Key Laboratory of Tropical Disease Control of Ministry of Education, Sun Yat-sen University, Guangzhou, 510080, China; NHC Key Laboratory of Systems Biology of Pathogens, Institute of Pathogen Biology, Chinese Academy of Medical Sciences & Peking Union Medical College, Beijing, 100176, China
| | - Jia Zhou
- State Key Laboratory of Pathogen and Biosecurity, Beijing Institute of Microbiology and Epidemiology, Beijing, 100071, China
| | - Tongling Chen
- Institute of Human Virology, Zhongshan School of Medicine, and Key Laboratory of Tropical Disease Control of Ministry of Education, Sun Yat-sen University, Guangzhou, 510080, China
| | - Xiaojing Chi
- NHC Key Laboratory of Systems Biology of Pathogens, Institute of Pathogen Biology, Chinese Academy of Medical Sciences & Peking Union Medical College, Beijing, 100176, China
| | - Xiuying Liu
- NHC Key Laboratory of Systems Biology of Pathogens, Institute of Pathogen Biology, Chinese Academy of Medical Sciences & Peking Union Medical College, Beijing, 100176, China
| | - Shengnan Pan
- NHC Key Laboratory of Systems Biology of Pathogens, Institute of Pathogen Biology, Chinese Academy of Medical Sciences & Peking Union Medical College, Beijing, 100176, China
| | - Wenfang Chen
- NHC Key Laboratory of Systems Biology of Pathogens, Institute of Pathogen Biology, Chinese Academy of Medical Sciences & Peking Union Medical College, Beijing, 100176, China
| | - Tiantian Wu
- Institute of Human Virology, Zhongshan School of Medicine, and Key Laboratory of Tropical Disease Control of Ministry of Education, Sun Yat-sen University, Guangzhou, 510080, China
| | - Tianli Lin
- NHC Key Laboratory of Systems Biology of Pathogens, Institute of Pathogen Biology, Chinese Academy of Medical Sciences & Peking Union Medical College, Beijing, 100176, China
| | - Xinhui Zhang
- NHC Key Laboratory of Systems Biology of Pathogens, Institute of Pathogen Biology, Chinese Academy of Medical Sciences & Peking Union Medical College, Beijing, 100176, China
| | - Yi-Ping Li
- Institute of Human Virology, Zhongshan School of Medicine, and Key Laboratory of Tropical Disease Control of Ministry of Education, Sun Yat-sen University, Guangzhou, 510080, China.
| | - Wei Yang
- NHC Key Laboratory of Systems Biology of Pathogens, Institute of Pathogen Biology, Chinese Academy of Medical Sciences & Peking Union Medical College, Beijing, 100176, China.
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