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Epstein-Barr Virus dUTPase Induces Neuroinflammatory Mediators: Implications for ME/cfs (2019) WIlliams et al.

Discussion in 'BioMedical ME/CFS Research' started by Milo, May 3, 2019.

  1. Milo

    Milo Senior Member (Voting Rights)

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    Epstein-Barr Virus dUTPase Induces Neuroinflammatory Mediators: Implications for Myalgic Encephalomyelitis/Chronic Fatigue Syndrome.

    https://www.ncbi.nlm.nih.gov/pubmed/?term=Williams PhD MV[Author]&cauthor=true&cauthor_uid=31040055

    Neuroinflammation is a common feature in myalgic encephalomyelitis/chronic fatigue syndrome (ME/CFS), affecting 85%-90% of all patients, yet the underlying mechanism or mechanisms responsible for the initiation and/or promotion of this process is largely unknown.

    Multiple reports, however, have suggested a role for Epstein-Barr virus (EBV), in particular, in ME/CFS, but its potential role, if any, in the neuroinflammatory process has not been addressed.

    In support of this premise, studies by our group have found that the EBV protein deoxyuridine triphosphate nucleotidohydrolase (dUTPase) induces anxiety and sickness behaviors in female mice.

    We also found that a small subset of patients with ME/CFS exhibited prolonged and significantly elevated neutralizing antibodies against EBV dUTPase protein in serum, which inversely correlated with ME/CFS symptoms.

    A larger ME/CFS case-control cohort study further confirmed that a significant percentage of patients with ME/CFS (30.91%-52.7%) were simultaneously producing antibodies against multiple human herpesviruses-encoded dUTPases and/or human dUTPase.

    Altogether, these findings suggest that EBV dUTPase protein may be involved in the neuroinflammatory process observed in ME/CFS.

    Thus, the aim of the present study was to determine whether the EBV dUTPase protein could contribute to neuroinflammation by altering the expression of genes involved with maintaining blood-brain barrier (BBB) integrity and/or modulating synaptic plasticity.

    With the use of human immortalized astrocytes, microglia, and cerebral microvascular endothelial cells, we conducted time-course (0-24 h) experiments with EBV dUTPase protein (10 μg/mL) to determine what effect(s) it may have on the expression of genes involved with BBB permeability, astrocytes and microglia cell function, tryptophan metabolism, and synaptic plasticity by quantitative reverse transcription polymerase chain reaction (qRT-PCR).

    In parallel, in vivo studies were conducted in female C57Bl/6 mice.

    Mice were injected by the intraperitoneal route with EBV dUTPase protein (10 μg) or vehicle daily for 5 days, and the brains were collected and processed for further qRT-PCR analysis of the in vivo effect of the dUTPase on the dopamine/serotonin and γ-aminobutyric acid/glutamate pathways, which are important for brain function, using RT2 Profiler PCR Arrays.

    EBV dUTPase protein altered the expression in vitro (12 of 15 genes and 32 of 1000 proteins examined) and in vivo (34 of 84 genes examined) of targets with central roles in BBB integrity/function, fatigue, pain synapse structure, and function, as well as tryptophan, dopamine, and serotonin metabolism.

    The data suggest that in a subset of patients with ME/CFS, the EBV dUTPase could initiate a neuroinflammatory reaction, which contributes to the fatigue, excessive pain, and cognitive impairments observed in these patients
  2. Peter Trewhitt

    Peter Trewhitt Senior Member (Voting Rights)

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    I am just getting an error message with the link. Am using an old iPad, but tried several browsers.

    I was puzzled by the emphaticness of the statement in the abstract that 85 to 90% of people with ME have neuroinflamation. I had understood this was still a debated issue.
    Andy likes this.
  3. Andy

    Andy Committee Member & Outreach

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    Hampshire, UK
    Peter Trewhitt likes this.
  4. Jonathan Edwards

    Jonathan Edwards Senior Member (Voting Rights)

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    This is the problem with the term neuroinflammation. Nobody knows quite what they mean by it so nobody knows what statements like this mean.
  5. rvallee

    rvallee Senior Member (Voting Rights)

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    How do they measure that? Anxiety is self-reported and very often misdiagnosed. Did they create a line of sentient talking mice that have superior anxiety self-reporting ability? This kind of stuff really removes credibility, when it talks about stuff that can't actually be confirmed as if it were.
    adambeyoncelowe likes this.
  6. obeat

    obeat Senior Member (Voting Rights)

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