Molecular Infectious Disease Research Center, Chang Gung Memorial Hospital, College of Medicine , Chang Gung University , Linkou 333 , Taiwan.
Research Center for Chinese Herbal Medicine , Chang Gung University of Science and Technology , Taoyuan 33303 , Taiwan.
J Med Chem. 2019 Mar 14;62(5):2390-2403. doi: 10.1021/acs.jmedchem.8b01683. Epub 2019 Feb 22.
Influenza A viruses (IAVs) have caused worldwide epidemics and pandemics by reassortment and generation of drug-resistant mutants, which render antivirals and current vaccinations no longer usable. In this study, an itaconic acid derivative 1 was identified from a chemical library of 20 000 compounds, by performing a cell-based screening assay, as a lead agent exhibiting anti-influenza A activity. Accordingly, a series of itaconic acid derivatives were designed and synthesized by adopting a rational design strategy to obtain more potent anti-influenza agents. The results of an in vitro pharmacological study showed that compounds 4 and 8 exhibited the most potent anti-IAV effect with half-maximal effective concentration values of 0.14 and 0.11 μM, respectively, in Madin-Darby canine kidney cells. The mechanism of action studies showed that lead agents 1 and 4 reduced virus replication by directly targeting IAV nucleoproteins and disrupting virus ribonucleoprotein export from the nucleus to the cytosol. On the basis of its high potential as an anti-IAV agent and its selectivity index >785, compound 4 was found to be a promising candidate for further development against IAVs.
甲型流感病毒（IAV）通过重配和产生耐药突变体引起了全球的流行和大流行，这使得抗病毒药物和当前的疫苗不再有效。在这项研究中，通过进行基于细胞的筛选试验，从 20000 种化合物的化学文库中鉴定出一种衣康酸衍生物 1，它是一种具有抗甲型流感活性的先导化合物。因此，采用合理的设计策略设计并合成了一系列衣康酸衍生物，以获得更有效的抗流感药物。体外药理学研究结果表明，化合物 4 和 8 在 Madin-Darby 犬肾细胞中具有最强的抗 IAV 作用，半数有效浓度值分别为 0.14 和 0.11 μM。作用机制研究表明，先导化合物 1 和 4 通过直接靶向 IAV 核蛋白和破坏病毒核糖核蛋白从细胞核向细胞质的输出，从而降低病毒复制。基于其作为抗 IAV 药物的高潜力和选择性指数>785，发现化合物 4 是进一步开发抗 IAV 药物的有前途的候选药物。
