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Identification of tyrphostin AG879 and A9 inhibiting replication of Chikungunya virus by screening of a kinase inhibitor library
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  • Hailin Tang,
  • Yanhua He,
  • Zhendong Pan,
  • Yan Liu,
  • Liangliang Jiang,
  • Haoran Peng,
  • Ping Zhao,
  • Zhongtian Qi,
  • Yangang Liu
Hailin Tang
Navy Medical University

Corresponding Author:[email protected]

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Yanhua He
Navy Medical University
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Zhendong Pan
Navy Medical University
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Yan Liu
Navy Medical University
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Liangliang Jiang
Navy Medical University
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Haoran Peng
Navy Medical University
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Ping Zhao
Navy Medical University
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Zhongtian Qi
Navy Medical University
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Yangang Liu
Navy Medical University
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Abstract

Chikungunya virus (CHIKV) is a globally public health threat. There are currently no medications available to treat CHIKV infection. High-throughput screening of 419 kinase inhibitors was performed based on the cytopathic effect method, and six kinase inhibitors with reduced cytopathic effects, including tyrphostin AG879 (AG879), tyrphostin 9 (A9), sorafenib, sorafenib tosylate, regorafenib, and TAK-632, were identified. The anti-CHIKV activities of two receptor tyrosine kinase inhibitors, AG879 and A9, that have not been previously reported, were selected for further evaluation. The results indicated that 50% cytotoxic concentration (CC 50) of AG879 and A9 in Vero cells were greater that than 30 μM and 6.50 μM, respectively and 50% effective concentration (EC 50) were 0.84 μM and 0.36 μM, respectively. The time-of-addition and time-of-removal assays illustrated that both AG879 and A9 function in the middle stage of CHIKV life cycle. Further, AG879 and A9 do not affect viral attachment; however, they inhibit viral RNA replication, and exhibit antiviral activity against CHIKV Eastern/Central/South African and Asian strains, Ross River virus and Sindbis virus in vitro.