Repurposing of HIV/HCV protease inhibitors against SARS-CoV-2 3CL(pro).

Repurposing of HIV/HCV protease inhibitors against SARS-CoV-2 3CL(pro).
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针对 SARS-CoV-2 3CLpro 的 HIV/HCV 蛋白酶抑制剂的再利用

DOI:
10.1016/j.antiviral.2022.105419
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发表时间:
2022-11
期刊:
影响因子:
7.6
通讯作者:
--
中科院分区:
医学2区
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严重急性呼吸综合征冠状病毒2型(SARS-CoV-2)是导致全球新冠肺炎爆发的病原体。SARS-CoV-2的3C型蛋白水解酶(3CLpro)在病毒复制中起着关键作用,已成为抗病毒药物设计的理想靶点。在这项工作中,我们利用生物发光共振能量转移(BRET)技术建立了一种基于细胞的筛选SARS-CoV-2 3CLPro抑制剂的方法,并将该方法应用于筛选一系列已知的HIV/丙型肝炎病毒蛋白水解酶抑制剂。结果表明,该方法能够定量测定3CLPro的切割效率,重复性好(Z‘因子为0.59)。结果表明,26种蛋白水解酶抑制剂中有9种对SARS-CoV-2 3CLPro的活性有抑制作用,且呈剂量依赖关系。其中,4个化合物在体外表现出与3CLpro3结合的能力。丙型肝炎病毒蛋白水解酶抑制剂西美普利韦显示出最强的抗3CLPro活性,其EC50值为2.6GμM,结合在3CLPro的活性部位口袋上,更重要的是,对含有突变P132H的蛋白水解酶显示出类似的活性。综上所述,这项工作证明了基于细胞的Bret法用于筛选3CLPro抑制剂的可行性,并支持西美普韦开发3CLPro抑制剂的潜力。
Severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) is the pathogen that caused the global COVID-19 outbreak. The 3C-like protease (3CLpro) of SARS-CoV-2 plays a key role in virus replication and has become an ideal target for antiviral drug design. In this work, we have employed bioluminescence resonance energy transfer (BRET) technology to establish a cell-based assay for screening inhibitors against SARS-CoV-2 3CLpro, and then applied the assay to screen a collection of known HIV/HCV protease inhibitors. Our results showed that the assay is capable of quantification of the cleavage efficiency of 3CLpro with good reproducibility (Z′ factor is 0.59). Using the assay, we found that 9 of 26 protease inhibitors effectively inhibited the activity of SARS-CoV-2 3CLpro in a dose-dependent manner. Among them, four compounds exhibited the ability to bind to 3CLproin vitro. HCV protease inhibitor simeprevir showed the most potency against 3CLpro with an EC50 vale of 2.6 μM, bound to the active site pocket of 3CLpro in a predicted model, and importantly, exhibited a similar activity against the protease containing the mutations P132H in Omicron variants. Taken together, this work demonstrates the feasibility of using the cell-based BRET assay for screening 3CLpro inhibitors and supports the potential of simeprevir for the development of 3CLpro inhibitors.
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影响因子: 8.8
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