Epstein Barr EBV

From: <a href="http://simmaronresearch.com/2018/04/autoimmune-virus-groundbreaking-ebv-finding-help-explain-mecfs/">The Autoimmune Virus? Groundbreaking EBV Finding Could Help Explain ME/CFS - Simmaron Research</a>

I sensed some awe in Ron Davis’s voice as he pushed for more understanding of Epstein-Barr Virus’s effects in ME/CFS during a talk at the Brain Science conference.  Davis is not to my knowledge finding much evidence of EBV reactivation in the severe ME/CFS patient study – a surprise – but he is very interested in what happened during that initial EBV infection, which appears to have triggered chronic fatigue syndrome (ME/CFS) in so many people.

<div id="attachment_2157" class="wp-caption alignright">A large, complex and very common virus, EBV is responsible for infectious mononucleosis and appears to contribute to numerous autoimmune disorders.</div>

He’s not alone in his “admiration” for the virus. Simmaron’s Advisor, Dr. Daniel Peterson, whose clinical practice and research stemmed from an outbreak in the Lake Tahoe region of Chronic Fatigue Syndrome, has tracked EBV in patients for decades, noting very high titers to EBV and other herpes viruses in subsets of patients.

It’s not surprising that these two important figures have had their eyes on EBV. EBV, after all, is kind of in a league of its own.  An invader of B and epithelial cells, the 50th anniversary of its discovery was recently celebrated with numerous reviews.  Epstein-Barr was discovered in 1966 by Anthony Epstein and Yvonne Barr. It was the first human virus <a href="http://scienceblog.cancerresearchuk.org/2014/03/26/50-years-of-epstein-barr-virus/">shown to cause cancer</a>. The sequencing of its large genome in 1995 helped launch the genomic era.

One of the more massive and complicated viruses, it’s one of the very few viruses that’s able to avoid elimination: once EBV infects your B-cells, it’s in your body to stay. It’s able to effectively hide from the immune system and reactivate just enough so that when the infected B-cells die it can move on to other cells.

We’re well equipped to ward off EBV when we’re young – it usually produces only minor symptoms – but as our immune systems alter as we age, that changes.  Encountering EBV as an adolescent or adult (infectious mononucleosis, glandular fever)  – as increasingly happens in our germ phobic age – often means months of convalescence as our immune systems struggle to ward off this powerful virus.

The problems don’t stop there. We know that infectious mononucleosis (IM) is a common trigger of ME/CFS but coming down with <a href="https://jamanetwork.com/journals/jamaneurology/fullarticle/793221">IM/glandular fever</a> in adolescence has also been shown to increase one’s risk of coming down with multiple sclerosis 2-4 fold and lupus by fifty percent.  Because of EBV’s ability to remain latent in the body, EBV reactivations are a huge problem for <a href="https://www.agenovir.com/opportunity/ebv/">transplant patients</a> with compromised immune systems.

The big question concerning EBV is how a virus which has essentially been latent for decades could contribute to serious diseases like MS and lupus. We now may have the answer. Last week, what will probably turn out to be a seminal paper in pathogen research directly showed for the first time how EBV appears to be able to trigger autoimmune diseases later in life and could conceivably play a role in ME/CFS.

The rather hum drum title of the paper “Transcription factors operate across disease loci with EBNA2 implicated in autoimmunity” in the Nature Genetics Journal hardly hinted at the possibilities the paper presents.

<a href="ttps://www.nature.com/articles/s41588-018-0102-3#Sec24">Transcription factors operate across disease loci, with EBNA2 implicated in autoimmunity </a><a href="https://www.nature.com/articles/s41588-018-0102-3#auth-1">John B. Harley</a>, <a href="https://www.nature.com/articles/s41588-018-0102-3#auth-2">Xiaoting Chen</a>, <a href="https://www.nature.com/articles/s41588-018-0102-3#auth-3">Mario Pujato</a>, <a href="https://www.nature.com/articles/s41588-018-0102-3#auth-4">Daniel Miller</a>, <a href="https://www.nature.com/articles/s41588-018-0102-3#auth-5">Avery Maddox</a>, <a href="https://www.nature.com/articles/s41588-018-0102-3#auth-6">Carmy Forney</a>, <a href="https://www.nature.com/articles/s41588-018-0102-3#auth-7">Albert F. Magnusen</a>, <a href="https://www.nature.com/articles/s41588-018-0102-3#auth-8">Arthur Lynch</a>, <a href="https://www.nature.com/articles/s41588-018-0102-3#auth-9">Kashish Chetal</a>, <a href="https://www.nature.com/articles/s41588-018-0102-3#auth-10">Masashi Yukawa</a>, <a href="https://www.nature.com/articles/s41588-018-0102-3#auth-11">Artem Barski</a>, <a href="https://www.nature.com/articles/s41588-018-0102-3#auth-12">Nathan Salomonis</a>, <a href="https://www.nature.com/articles/s41588-018-0102-3#auth-13">Kenneth M. Kaufman</a>, <a href="https://www.nature.com/articles/s41588-018-0102-3#auth-14">Leah C. Kottyan</a> & <a href="https://www.nature.com/articles/s41588-018-0102-3#auth-15">Matthew T. Weirauch</a>. Nature Genetics (2018) doi:10.1038/s41588-018-0102-3

EBV  consists of several proteins of which EBNA-2 is one. EBNA-2 is EBV’s main viral <a href="https://en.wikipedia.org/wiki/Transactivator">transactivator</a>; i.e. it’s a transcription factor that turns on genes in an infected cell that help EBV to survive. Essentially EBNA-2 allows EBV to hijack a cell’s genetics and put them to its own use.

The study – produced by researchers at Cinncinnati’s Children Hospital – demonstrated that once EBV infects B-cells, it turns on genes that have been identified as risk factors for a boatload of autoimmune diseases.

It turns out that even though the virus is, so to speak, latent; i.e. it’s not replicating – its transcription factor is still active  – altering the expression of our genes. The genes that it affects just happen to be the same genes that increase the risk of developing lupus, multiple sclerosis (MS), rheumatoid arthritis (RA), juvenile idiopathic arthritis (JIA), inflammatory bowel disease (IBD), celiac disease, and type 1 diabetes.  Apparently decades of genetic assault from EBV’s transcription factor can set the stage or at least contribute to many autoimmune diseases.

Chronic diseases are usually caused by a variety of genetic and environmental factors. Because not everyone with these transcription factors comes down with a chronic illness, other factors must play a role. The authors believe, though, that the gene expression changes induced by the virus in the B cells could account for a large number of people with lupus and MS who fall ill.

“In lupus and MS, for example, the virus could account for a large percentage of those cases. We do not have a sense of the proportion in which the virus could be important in the other EBNA2-associated diseases,” <a href="https://multiplesclerosisnewstoday.com/2018/04/23/epstein-barr-virus-may-increase-risk-ms-other-diseases/">Harley</a>

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<h3>Chronic Fatigue Syndrome and EBV/Infectious Mononucleosis – A Short History</h3>

Researchers have been trying to figure out – mostly unsuccessfully- what the heck happens to plunge people with infectious mononucleosis into ME/CFS for quite some time.

<div id="attachment_3656" class="wp-caption alignright">Infectious mononucleosis/glandular fever is believed to be a common trigger of ME/CFS</div>

In fact, infectious mononucleosis/glandular fever was probably the first disease associated with ME/CFS. Studies in the mid-1990’s, including one from the CDC, suggested ME/CFS was, at least in part,  “<a href="https://www.ncbi.nlm.nih.gov/pubmed/3033337">chronic infectious mononucleosis</a>” or “<a href="https://www.ncbi.nlm.nih.gov/pubmed/6093268">chronic mononucleosis syndrome</a>“.  Even Stephen Straus penned a paper on the “The <a href="https://www.ncbi.nlm.nih.gov/pubmed/2830340">chronic mononucleosis syndrome</a>“.

Straus’s small 1989 study reporting high rates of psychiatric diagnoses in ME/CFS patients prior to their becoming ill set a theme in motion which was disproved by two Peter White  <a href="https://www.ncbi.nlm.nih.gov/pubmed/11747919">ME/CFS IM</a> publications.  White found IM/glandular fever to be a particularly strong <a href="https://www.ncbi.nlm.nih.gov/pubmed/9926075">trigger of ME/CFS</a> which he concluded was probably responsible for about 3,000 new cases of ME/CFS a year in the U.K.

A 1992 Swedish study began a trend of examining people with ME/CFS during infectious mononucleosis and afterwards in order to try and determine what happened. That study concluded that whatever happened was not <a href="https://www.ncbi.nlm.nih.gov/pubmed/1316417">due to EBV reactivation</a>.

In 2010 Taylor found <a href="https://www.ncbi.nlm.nih.gov/pubmed/20447647">reduced peak oxygen consumption</a> during exercise in adolescents with ME/CFS after IM compared to IM patients who had recovered. Broderick’s finding of <a href="https://www.ncbi.nlm.nih.gov/pubmed/22973830">altered cytokine networks</a> associated with Th17 in ME/CFS patients following IM suggested immune dysregulation had occurred.

Glaser’s 2005 study suggested that an <a href="https://www.ncbi.nlm.nih.gov/pubmed/15664781">EBV encoded enzyme</a> produced by a non-replicating form of EBV could be producing symptoms in ME/CFS.  Lerner’s 2012 study suggested that antibodies to two EBV produced proteins were commonly present in ME/CFS – suggesting that a <a href="https://www.ncbi.nlm.nih.gov/pubmed/23155374">prolonged immune reaction to EBV</a> might be occurring in ME/CFS as well.

In 2014 Loebel/Scheibenbogen suggested that ME/CFS patients may be having difficulty controlling <a href="https://www.ncbi.nlm.nih.gov/pubmed/24454857">the early stages of EBV reactivation</a>.   Loebel’s 2017 follow up study suggested that ME/CFS patients’ immune system might be over-reacting to an EBV produced protein and that <a href="https://www.ncbi.nlm.nih.gov/pubmed/28604802">autoimmunity</a>might be involved.

Leonard Jason’s large IM college student study will hopefully provide clues why some people never recover from it. He’s completing data analysis of a study examining college students who came down with infectious mononucleosis and then ME/CFS. So far Jason has found that at least 4-5% of college students come down with IM while at school.

<h3>Treatment Implications</h3>

Interestingly, several drugs that are available can block some of the transcription factors EBV has inserted into B-cells.  (I was unable to determine <a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3851581/">what they are</a>.) The authors also hope the study will help spur more efforts to produce an EBV vaccine.

Now that we have evidence that EBV/IM contributes to many autoimmune diseases, it’s hard to think that ME/CFS is not somehow involved. Chronic fatigue syndrome is different in that infectious mononucleosis (and other infections) immediately triggers ME/CFS in many people. What we don’t know is if bouts of IM also trigger ME/CFS 5, 10, 15 or more years later as occurs in these other disorders.

<h3>Opportunities for Collaboration Open Up</h3>

The big question awaiting ME/CFS now is if the abnormal transcription factors associated with the autoimmune diseases in the recent paper are present. The good news is that a study determining that appears to be within reach of an ME/CFS researcher with the technical ability and funds. In an unusual move, the Cincinnati researchers are making the computer code they used available to other researchers.

“We are going to great lengths to not only make the computer code available, but all of the data and all of the results. We think it’s an interesting approach that could have implications for many diseases, so we’re contacting experts on the various diseases and sharing the results and seeing if they want to collaborate to follow-up on them.” <a href="https://multiplesclerosisnewstoday.com/2018/04/23/epstein-barr-virus-may-increase-risk-ms-other-diseases/">Weinrauch</a>

“This discovery is probably fundamental enough that it will spur many other scientists around the world to reconsider this virus in these disorders” Harley

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The Cinncinnati team is providing its computer code free to other researchers

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They believe EBV will be implicated in many more diseases, and there is already some evidence that it is.  Using the same analytical techniques, they’ve already identified 94 other diseases including many non-autoimmune diseases in which EBV may play a role.

This is one of the few studies in which the researchers are so jazzed by their results that they’ve dropped all pretenses to modesty. The study results need to be validated, but because EBV is so common and is potentially linked to so many autoimmune (and other diseases), it has the potential to rewrite our understanding of how autoimmune diseases arise. The authors fully recognize the potential importance of their finding. The lead author of the study, John Harley, said:

“I’ve been a co-author in almost 500 papers. This one is more important than all of the rest put together. It is a capstone to a career in medical research,” <a href="https://www.cincinnatichildrens.org/news/release/2018/mono-virus">Harley</a>

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One of the senior authors of the study stated:

“This same cast of characters is a villain in multiple immune-related diseases. They’re playing that role through different ways, and doing it at different places in your genome, but it’s the same sinister characters. So if we could develop therapies to stop them from doing this, then it would help multiple diseases.” Matthew Weirauch

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From: 'Chronic Fatigue Syndrome, A Roadmap for Testing and Treatment' <a href="https://sites.google.com/site/cfstestingandtreatmentroadmap/home">https://sites.google.com/site/cfstestingandtreatmentroadmap/home</a>
There is a high 95% prevalence of Epstein-Barr virus in the adult population, so most people will have this virus in their system, but usually in a latent inactive state. However, if you have an active EBV infection, it is possible this may be contributing to or causing your ME/CFS symptoms. 

After mononucleosis (glandular fever), which is mostly caused by EBV, ME/CFS was found as a sequelae in 9% of cases.<a href="http://www.ncbi.nlm.nih.gov/pubmed/9926075" target="blank" rel="nofollow">1</a> Another study found that at 6, 12 and 24 months after mononucleosis, 13%, 7% and 4% of patients respectively met the criteria for CFS, indicating that post-mononucleosis CFS can clear up over time, to an extent.<a href="http://www.ncbi.nlm.nih.gov/pubmed/19564299" target="blank" rel="nofollow">1</a>

Evidence indicates that some subtypes of ME/CFS may be due to partial reactivation of Epstein-Barr virus.<a href="http://www.prohealth.com/library/showarticle.cfm?libid=17704" target="blank" rel="nofollow">1</a> <a href="http://www.ncbi.nlm.nih.gov/pubmed/23155374" target="blank" rel="nofollow">2</a>

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The Epstein Barr Virus (EBV), which causes mononucleosis (also called glandular fever), has been continually linked with Chronic Fatigue and Fibromyalgia (FM). Many people with these conditions initially had EBV and never recovered. Recent studies continue to associate the two together. Other viruses are also commonly found in the blood of many people with CFS and FM.
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People with these conditions, regularly test positive for elevated levels of RNase L, which is an enzyme found in the cells of the body. It is activated when the body is under attack from viruses. However it appears that the RNase L system of those with CFS is compromised, and is therefore unable to effectively fight the viruses.
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From: 'Epstein-Barr Virus Evidence for Role in Chronic Fatigue Syndrome' <a href="https://www.verywell.com/ebv-reaction-chronic-fatigue-3972945">https://www.verywell.com/ebv-reaction-chronic-fatigue-3972945</a>

The Epstein-Barr virus (EBV) is a member of the herpesvirus family and one of the most common human viruses. The Epstein-Barr virus (EBV) has long been tentatively connected to chronic fatigue syndrome (ME/CFS.) Some researchers say it's an important causal factor while others say it's not involved with this disease.

Those who believe it is connected often talk about reactivation. EBV is in the herpesvirus family.

All herpesviruses stay in your system forever, but generally remain dormant most of the time. When they do become active, specialized cells in the immune system, including B-cells and T-cells, typically don't have a problem knocking them back down again.

Most people aren't even aware that this process is going on. That's because B- and T-cells, in a healthy immune system, remember the virus and can rapidly assemble an army of antibodies to keep it in check.

If the immune system isn't working correctly, though, it could theoretically allow the virus to gain a foothold at levels that once again make you sick. That's called reactivation.

Evidence of Reactivation

Research published in 2014 shores up the hypothesis of EBV reactivation as a possible cause of some cases of ME/CFS.

In this study, scientists found evidence that the B- and T-cells of many people with this disease were unable to remember EBV, meaning a reactivated virus would be better able to thrive, reproduce, and cause symptoms.

Researchers found this impaired cellular memory in the immune systems of 76 percent of the more than 400 study participants. That's an impressive percentage.

Along with showing what may cause and sustain some cases of ME/CFS, researchers say this work could lead to a long-sought diagnostic marker.

More About the Epstein-Barr Virus

EBV is a nasty bug.

It's best known for causing infectious mononucleosis, called mono or the "kissing disease." Symptoms of mono include:

severe fatigue

sore throat

headache

fever

muscle aches

swollen lymph nodes

sensitivity to light

shortness of breath

Recovery from mono is known to take a long time, and recurrences are marked by extreme fatigue.

Some researchers have long believed it's no coincidence that those are also symptoms of ME/CFS. However, a large portion of the population carries EBV and only a small number of those people develop ME/CFS. That has confounded attempts to explain how EBV could contribute to the illness.

This study appears to overcome that problem, though, providing an answer to that question. It doesn't answer questions about why some people's immune systems seem to be blind to this particular virus, though. That's a topic for future research.

Previous Studies

Other studies have shown that a significant number of juvenile ME/CFS cases followed mono, and many adolescents whom doctors deem unrecovered from mono fit the ME/CFS diagnostic criteria. It seems that the harder EBV hits, the more likely it is to cause prolonged illness. (Read more about these findings from Cort Johnson at Health Rising.)

In addition to mono, EBV is linked to certain types of cancer, which could explain the higher incidence of cancer-related illness and death some ME/CFS experts have observed. EBV may also play a role in multiple sclerosis. Some research also suggests it can mimic acute leukemia.

With this new discovery of impaired cellular memory, we may have filled a significant gap in knowledge about how EBV could be triggering ME/CFS and contributing to on-going symptoms.

While more work is needed to verify this study, it could prompt more doctors to prescribe anti-viral medications (such as valacyclovir or valganciclovir) for ME/CFS patients with high EBV levels.

Sources:

Chhabra P, Law AD, Sharma U, et al. Epstein-barr virus infection masquerading as acute leukemia: a report of two cases and review of literature. Indian journal of hematology & blood transfusion. 2014 Mar;30(1):26-8.

Loebel M, Strohschein K, Giannini C, et al. Deficient EBV-specific B- and T-cell response in patients with chronic fatigue syndrome. PLoS One. 2014 Jan 15;9(1):e85387. eCollection 2014.

Epstein Barr EBV

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