期刊
ANTIVIRAL RESEARCH
卷 118, 期 -, 页码 68-74出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.antiviral.2015.03.010
关键词
Dengue; Antiviral; Protease inhibitor; NS2B-NS3
资金
- A*STAR Biomedical Research Council
- MINDEF DIRP Grant [R182-000-210-232]
The dengue virus is a mosquito-borne pathogen responsible for an estimated 50-100 million human dengue infections annually. There are currently no approved drugs against this disease, resulting in a major unmet clinical need. The dengue viral NS2B-NS3 protease has been identified as a plausible drug target due to its involvement in viral replication in mammalian host cells. In the past decade, at least 20 dengue NS2B-NS3 protease inhibitors have been reported in the literature with a range of inhibitory activities in protease assays. However, such assays do not shed light on an inhibitor's ability to penetrate human cell membranes where the viral protease resides. In this study, we investigated the antiviral activities of 15 small-molecule and peptide-based NS2B-NS3 inhibitors on dengue serotype 2-infected HuH-7 human hepatocarcinoma cells. Experimental results revealed anthraquinone ARDP0006 (compound 5) to be the most potent inhibitor which reduced dengue viral titer by more than I log PFU/mL at 1 mu M in our cell-based assays involving HuH-7 and K562 cell lines, suggesting that its scaffold could serve as a lead for further medicinal chemistry studies. Compound 5 was also found to be non-cytotoxic at 1 mu M over 3 days incubation on HuH-7 cells using the Alamar Blue cellular toxicity assay. (C) 2015 Elsevier B.V. All rights reserved.
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