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Thus, there is an urgent need to develop therapeutic agents to cure this epidemic disease. In the present study, we identified a potential small-molecule inhibitor, BP13944, via high-throughput screening (HTS) of 60,000 compounds using a stable cell line harboring an efficient luciferase replicon of DENV serotype 2 (DENV-2). BP13944 reduced the expression of the DENV replicon reporter in cells, showing a 50% effective concentration (EC\n            <jats:sub>50<\/jats:sub>\n            ) of 1.03 \u00b1 0.09 \u03bcM. Without detectable cytotoxicity, the compound inhibited replication or viral RNA synthesis in all four serotypes of DENV but not in Japanese encephalitis virus (JEV). Sequencing analyses of several individual clones derived from BP13944-resistant RNAs purified from cells harboring the DENV-2 replicon revealed a consensus amino acid substitution (E66G) in the region of the NS3 protease domain. Introduction of E66G into the DENV replicon, an infectious DENV cDNA clone, and recombinant NS2B\/NS3 protease constructs conferred 15.2-, 17.2-, and 3.1-fold resistance to BP13944, respectively. Our results identify an effective small-molecule inhibitor, BP13944, which likely targets the DENV NS3 protease. BP13944 could be considered part of a more effective treatment regime for inhibiting DENV in the future.\n          <\/jats:p>","DOI":"10.1128\/aac.01281-13","type":"journal-article","created":{"date-parts":[[2013,10,22]],"date-time":"2013-10-22T02:41:14Z","timestamp":1382409674000},"page":"110-119","update-policy":"https:\/\/doi.org\/10.1128\/asmj-crossmark-policy-page","source":"Crossref","is-referenced-by-count":81,"title":["A Novel Dengue Virus Inhibitor, BP13944, Discovered by High-Throughput Screening with Dengue Virus Replicon Cells Selects for Resistance in the Viral NS2B\/NS3 Protease"],"prefix":"10.1128","volume":"58","author":[{"given":"Chi-Chen","family":"Yang","sequence":"first","affiliation":[{"name":"Institute of Biotechnology and Pharmaceutical Research, National Health Research Institutes, Zhunan Town, Miaoli, Taiwan, Republic of China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Han-Shu","family":"Hu","sequence":"additional","affiliation":[{"name":"Institute of Biotechnology and Pharmaceutical Research, National Health Research Institutes, Zhunan Town, Miaoli, Taiwan, Republic of China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Ren-Huang","family":"Wu","sequence":"additional","affiliation":[{"name":"Institute of Biotechnology and Pharmaceutical Research, National Health Research Institutes, Zhunan Town, Miaoli, Taiwan, Republic of China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Szu-Huei","family":"Wu","sequence":"additional","affiliation":[{"name":"Institute of Biotechnology and Pharmaceutical Research, National Health Research Institutes, Zhunan Town, Miaoli, Taiwan, Republic of China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Shiow-Ju","family":"Lee","sequence":"additional","affiliation":[{"name":"Institute of Biotechnology and Pharmaceutical Research, National Health Research Institutes, Zhunan Town, Miaoli, Taiwan, Republic of China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Weir-Torn","family":"Jiaang","sequence":"additional","affiliation":[{"name":"Institute of Biotechnology and Pharmaceutical Research, National Health Research Institutes, Zhunan Town, Miaoli, Taiwan, Republic of China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Jyh-Haur","family":"Chern","sequence":"additional","affiliation":[{"name":"Institute of Biotechnology and Pharmaceutical Research, National Health Research Institutes, Zhunan Town, Miaoli, Taiwan, Republic of China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Zhi-Shun","family":"Huang","sequence":"additional","affiliation":[{"name":"Institute of Molecular Biology, Academia Sinica, Taipei, Taiwan, Republic of China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Huey-Nan","family":"Wu","sequence":"additional","affiliation":[{"name":"Institute of Molecular Biology, Academia Sinica, Taipei, Taiwan, Republic of China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Chung-Ming","family":"Chang","sequence":"additional","affiliation":[{"name":"Institute of Biotechnology and Pharmaceutical Research, National Health Research Institutes, Zhunan Town, Miaoli, Taiwan, Republic of China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Andrew","family":"Yueh","sequence":"additional","affiliation":[{"name":"Institute of Biotechnology and Pharmaceutical Research, National Health Research Institutes, Zhunan Town, Miaoli, Taiwan, Republic of China"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"235","reference":[{"key":"e_1_3_3_2_2","first-page":"1153","volume-title":"Fields virology,","author":"Gubler DJ","year":"2007","unstructured":"GublerDJKunoGMarkoffL. 2007. 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