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<div about="/news-events/nih-research-matters/epstein-barr-virus-autoimmune-diseases" typeof="sioc:Item foaf:Document" class="ds-1col node node--nih-research-matters view-mode-full node--full node--nih-research-matters--full clearfix">
<p class="publishdate"><span property="dc:date" datatype="xsd:dateTime" content="2018-04-24T00:00:00-04:00" class="date-display-single">April 24, 2018</span></p><div class='syndicate'><h1>Epstein-Barr virus and autoimmune diseases</h1><div class="callout callout-with-border"><h3>At a Glance</h3>
<ul>
<li>Researchers found a mechanism that may explain why the Epstein-Barr virus is associated with certain autoimmune illnesses such as lupus.</li>
<li>A better understanding of how the virus infection contributes to autoimmune diseases in some people could lead to therapies that interrupt or reverse the process.</li>
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</picture><span class="caption">An electron microscopy image showing three Epstein-Barr virus particles. </span><span class="credit">NIAID</span></div>
</div><p>Most people are infected by the Epstein-Barr virus (EBV) in early childhood. It usually causes no symptoms or only a brief, mild illness. When teens or young adults become infected, it can cause infectious mononucleosis, or “mono.” The symptoms of mono are extreme fatigue, fever, sore throat, and swollen lymph nodes. These symptoms can last for two to four weeks. After infection, EBV becomes dormant, and people remain infected throughout their lives without any symptoms.</p>
<p>Previous studies suggested that EBV infection may play a role in the development of systemic lupus erythematosus and other autoimmune illnesses. However, the possible mechanisms to explain this relationship were unknown. A team of researchers led by Dr. John B. Harley at Cincinnati Childrens Hospital Medical Center performed a detailed genetic analysis to investigate the relationship between EBV infection and lupus. Their study was supported by NIHs National Institute of Allergy and Infectious Diseases (NIAID) and several other NIH components. The results were published online on April 16, 2018, in <em>Nature Genetics.</em></p>
<p>Past studies had identified more than 50 genetic regions associated with lupus. Most are thought to be involved in gene regulation. The researchers developed a computational and biochemical technique known as the Regulatory Element Locus Intersection algorithm, or RELI. They used RELI to compare the genetic variations tied to lupus with genetic and protein data from EBV-infected human cells.</p>
<p>The team found that a viral protein called EBNA2 was associated with nearly half of the genetic regions associated with the risk for lupus. EBNA2 is known to work through human transcription factors, which bind to DNA and affect the expression of genes nearby. RELI showed that many human transcription factors were associated with the same genetic regions as EBNA2.</p>
<p>The team also used RELI to compare the genetic regions tied to risk of other autoimmune diseases. They found that EBNA2 bound to regions associated with the risk for multiple sclerosis, rheumatoid arthritis, inflammatory bowel disease, type 1 diabetes, juvenile idiopathic arthritis, and celiac disease. Many transcription factors were associated with these regions as well.</p>
<p>These findings suggest that EBV infection drives the activation of genes that contribute to an individuals risk of developing autoimmune disease. The scientists note, however, that EBV isnt the only factor that influences the development of these conditions.</p>
<p>“Many cases of autoimmune illness are difficult to treat and can result in debilitating symptoms. Studies like this are allowing us to untangle environmental and genetic factors that may cause the bodys immune system to attack its own tissues,” says NIAID Director Dr. Anthony S. Fauci. “A better understanding of the complex causes of autoimmunity promises to lead to better treatment and prevention options.”</p></div><h2 class="label-above">Related Links</h2><ul class="spaced print-urls"><li><a href="https://www.nih.gov/news-events/nih-research-matters/gut-microbe-drives-autoimmunity" target="_top">Gut Microbe Drives Autoimmunity</a></li><li><a href="https://www.nih.gov/news-events/nih-research-matters/virus-linked-food-sensitivity" target="_top">Virus Linked to Food Sensitivity</a></li><li><a href="https://www.nih.gov/news-events/nih-research-matters/approach-targets-autoimmunity" target="_top">Approach Targets Autoimmunity</a></li><li><a href="https://www.nih.gov/news-events/nih-research-matters/autoimmune-disease-super-regulators-uncovered" target="_top">Autoimmune Disease Super-Regulators Uncovered</a></li><li><a href="https://www.nih.gov/news-events/nih-research-matters/bach2-helps-orchestrate-immune-response" target="_top">BACH2 Helps Orchestrate the Immune Response</a></li><li><a href="https://www.niams.nih.gov/health-topics/lupus" target="_top">Systemic Lupus Erythematosus (Lupus)</a></li><li><a href="https://www.niams.nih.gov/health-topics/autoimmune-diseases" target="_top">Autoimmune Diseases</a></li><li><a href="https://www.niehs.nih.gov/health/topics/conditions/autoimmune/index.cfm" target="_top">Autoimmune Diseases (Environmental Factors)</a></li></ul><p class="footnote"><strong class="label-inline">References:&nbsp;</strong><a href="https://www.ncbi.nlm.nih.gov/pubmed/29662164">Transcription factors operate across disease loci, with EBNA2 implicated in autoimmunity.</a> Harley JB, Chen X, Pujato M, Miller D, Maddox A, Forney C, Magnusen AF, Lynch A, Chetal K, Yukawa M, Barski A, Salomonis N, Kaufman KM, Kottyan LC, Weirauch MT. <em>Nat Genet</em>. 2018 Apr 16. doi: 10.1038/s41588-018-0102-3. [Epub ahead of print]. PMID: 29662164.</p><p class="footnote"><strong class="label-inline">Funding:&nbsp;</strong>NIHs National Institute of Allergy and Infectious Diseases (NIAID), National Institute of Neurological Disorders and Stroke (NINDS), National Human Genome Research Institute (NHGRI), National Institute of Arthritis and Musculoskeletal and Skin Diseases (NIAMS), National Heart, Lung, and Blood Institute (NHLBI), National Institute of Diabetes and Digestive and Kidney Diseases (NIDDK), National Center for Advancing Translational Sciences (NCATS), and National Institute of General Medical Sciences (NIGMS); Lupus Research Alliance; Cincinnati Childrens Research Foundation; Cincinnati Childrens Hospital Medical Center; Mary Kirkland Center for Lupus; and U.S. Department of Veterans Affairs.</p>
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