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<div about="/news-events/news-releases/nih-collaboration-helps-advance-potential-zika-treatments" typeof="sioc:Item foaf:Document" class="ds-1col node node--nih-news-release news-release featured-media-floated view-mode-full node--full node--nih-news-release--full clearfix">
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<p class="publishdate"><span class="tag-term">News Release</span></p><p class="publishdate"><span property="dc:date" datatype="xsd:dateTime" content="2016-08-29T11:00:00-04:00" class="date-display-single">Monday, August 29, 2016</span></p><h1>NIH collaboration helps advance potential Zika treatments</h1><p class="subtitle">
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<picture title="NCATS researcher dispenses zika virus into trays for compound screening. ">
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<source srcset="https://www.nih.gov/sites/default/files/styles/featured_media_breakpoint-large-extra/public/news-events/news-releases/2016/20160829-zika-researcher.jpg?itok=bCLDUFff&timestamp=1472475909 1x" media="screen and (min-width: 1100px)" />
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<source srcset="https://www.nih.gov/sites/default/files/styles/featured_media_breakpoint-large/public/news-events/news-releases/2016/20160829-zika-researcher.jpg?itok=rcxMuUs3&timestamp=1472475909 1x" media="screen and (min-width: 960px)" />
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<source srcset="https://www.nih.gov/sites/default/files/styles/featured_media_breakpoint-medium/public/news-events/news-releases/2016/20160829-zika-researcher.jpg?itok=jZKIkUa3&timestamp=1472475909 1x" media="screen and (min-width: 800px)" />
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<source srcset="https://www.nih.gov/sites/default/files/styles/featured_media_breakpoint-medium-small/public/news-events/news-releases/2016/20160829-zika-researcher.jpg?itok=bMApwSPl&timestamp=1472475909 1x" media="screen and (min-width: 600px)" />
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<source srcset="https://www.nih.gov/sites/default/files/styles/featured_media_breakpoint-small/public/news-events/news-releases/2016/20160829-zika-researcher.jpg?itok=EzKp2KC_&timestamp=1472475909 1x" media="screen and (min-width: 480px)" />
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<source srcset="https://www.nih.gov/sites/default/files/styles/featured_media__breakpoint-tiny_/public/news-events/news-releases/2016/20160829-zika-researcher.jpg?itok=976H865p&timestamp=1472475909 1x" media="screen and (min-width: 0)" />
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<img src="https://www.nih.gov/sites/default/files/styles/featured_media_breakpoint-medium/public/news-events/news-releases/2016/20160829-zika-researcher.jpg?itok=jZKIkUa3&timestamp=1472475909" alt="NCATS researcher dispenses zika virus into trays for compound screening. NCATS researcher dispenses zika virus into trays for compound screening. " title="NCATS researcher dispenses zika virus into trays for compound screening. " />
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</picture><span class="caption">NCATS researcher dispenses zika virus into trays for compound screening. </span><span class="credit">NCATS</span></div>
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</div><p>Researchers at the National Center for Advancing Translational Sciences (NCATS) recently identified compounds that potentially can be used to inhibit Zika virus replication and reduce its ability to kill brain cells. These compounds now can be studied by the broader research community to help combat the Zika public health crisis. NCATS is part of the National Institutes of Health.</p>
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<p>Using NCATS’ drug repurposing screening robots, researchers identified two classes of compounds effective against Zika: one is antiviral, and the other prevents Zika-related brain cell death. The compounds include emricasan, an investigational drug currently being evaluated in a clinical trial to reduce liver injury and fibrosis, and niclosamide, a U. S. Food and Drug Administration-approved drug for use in humans to treat worm infections. In addition, the researchers identified nine cyclin-dependent kinase (CDK) inhibitors. CDK usually is involved in regulation of cellular processes as well as normal brain development, but the Zika virus can negatively affect this process.</p>
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<p>NCATS’ work was a collaborative effort with Johns Hopkins University, Baltimore, (JHU) and Florida State University, Tallahassee, (FSU), and the study results were published in the August 29 issue of Nature Medicine<em>.</em> The NCATS screening effort builds on the initial research by JHU and FSU scientists, who discovered that the Zika virus infects brain cells early in development. Infection by the Zika virus may be related to fetal microcephaly, an abnormally small head resulting from an underdeveloped and/or damaged brain.</p>
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<p>The Zika virus has been reported in 60 countries and territories worldwide; currently, there are no vaccines or effective drug treatments. The virus is spread primarily through bites from infected <em>Aedes aegypti</em> mosquitoes, and in addition, can be transmitted from mother to child and through sexual contact. It also is associated with neurological diseases such as Guillain-Barré syndrome in infected adults.</p>
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<p>“The Zika virus poses a global health threat,” said Anton Simeonov, Ph.D., NCATS scientific director. “While we await the development of effective vaccines, which can take a significant amount of time, our identification of repurposed small molecule compounds may accelerate the translational process of finding a potential therapy.”</p>
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<p>NCATS researcher Wei Zheng, Ph.D., and his team led the drug repurposing screen to test three strains of Zika: Asian, African and Puerto Rican. The scientists first developed an assay (test) using caspase 3, a protein that causes brain cell death when infected by the virus. The next step was screening 6,000 FDA-approved and investigational compounds, which resulted in the identification of more than 100 promising compounds. The team then evaluated the protective effect of these compounds in brain cells after Zika virus infection. Three lead compounds, emiracsan, niclosamide and a CDK inhibitor known as PHA-690509, were identified as reducing neuronal cell death caused by Zika virus infection.</p>
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<p>These compounds were effective either in inhibiting the replication of Zika or in preventing the virus from killing brain cells. For example, emricasan prevents cell death, and niclosamide and the nine CDK inhibitors stop the virus’ replication. The team also found that emricasan, when combined with one of the CDK inhibitors, prevented both cell death and virus replication. In addition, the team noted that the CDK inhibitors may be useful in treating non-pregnant patients who face an increased risk of Guillain-Barré syndrome and other conditions sparked by Zika infection.</p>
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<p>The researchers cautioned, however, that the use of emricasan and niclosamide during pregnancy for Zika infection will need to be evaluated in pre-clinical toxicology studies and clinical trials.</p>
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<p>“Using the NCATS drug repurposing platform for emerging infectious diseases can help rapidly identify potential treatments for urgent needs such as the Zika virus,” Zheng said. “While identifying promising compounds is a first step, our goal at NCATS is to facilitate the translation of these findings for evaluation in the clinic. The release of all the compound screening data in this publication and in the public <a href="https://pubchem.ncbi.nlm.nih.gov/">PubChem</a> database opens the door to the research community to do just that.”</p>
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<p>NCATS’ screening effort enabled the broader research team to quickly translate their earlier discoveries toward work to develop treatments for Zika virus infection. JHU is working on a mouse model to study the neuroprotective effects of the compounds identified from the screen and studying the mechanism of action of the lead compounds. FSU is testing the efficacy of these compounds in a Zika virus mouse model and is also studying the mechanism of action of the lead compounds.</p>
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<p>In addition to NCATS, FSU and JHU, the research was supported by Emory University, Atlanta; the Maryland Stem Cell Research Fund, Columbia; NIH’s National Institute of Neurological Disorders and Stroke through grants NS048271 and NS095348, NS047344 and NS097206; and NIH’s National Institute of Allergy and Infectious Diseases through grant AI119530.</p>
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<p><strong>About the National Center for Advancing Translational Sciences (NCATS):</strong> To get more treatments to more patients more quickly, NCATS incorporates the power of data, new technologies and strategic collaborations to develop, demonstrate and disseminate innovations in translational science. Rather than targeting a particular disease or fundamental science, NCATS focuses on what is common across all diseases and the translational process. For more information, visit <a href="https://ncats.nih.gov">https://ncats.nih.gov</a>.</p>
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<p><strong>About the National Institutes of Health (NIH):</strong>
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NIH, the nation's medical research agency, includes 27 Institutes and Centers and is a component of the U.S. Department of Health and Human Services. NIH is the primary federal agency conducting and supporting basic, clinical, and translational medical research, and is investigating the causes, treatments, and cures for both common and rare diseases. For more information about NIH and its programs, visit <a href="/">www.nih.gov</a>.</p>
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<h3>Reference</h3>Xu et al. Identification of small molecule inhibitors of Zika virus infection and induced neural cell death via a drug repurposing screen. Nature Medicine. August 29, 2016. <a href="http://www.nature.com/nm/journal/vaop/ncurrent/full/nm.4184.html">http://www.nature.com/nm/journal/vaop/ncurrent/full/nm.4184.html</a>.</div>
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