@Hip did you ever end up giving arbidol (umifenovir) another shot? Just came across this:
Very interesting Halcyon,
that study is a great find.
I never tried Arbidol again after trying once for around 1 week (this was back in around 2010). But now with that study you found, which says Arbidol targets coxsackievirus B4, the active enteroviral infection that I have, I will definitely try it again, for a longer period.
Very interesting that the study talks about Arbidol treating "
IL-10 induced persistent viral infection". And that they found coxsackievirus B4 actually induces IL-10. I wonder if other Coxsackie B viruses and echoviruses are also capable of inducing IL-10.
IL-10 of course is a Th2 cytokine, and in the Th1/Th2 model of ME/CFS, viral clearance is prevented by too much Th2 dominance. So I expect that coxsackievirus B4 is "deliberately" inducing IL-10, in order to shift the immune response away from the antiviral Th1 mode, and towards the antibacterial Th2 mode, for immune evasion purposes.
So this induction of IL-10 could be one of the ways that ME/CFS patients are kept locked into a persistent enterovirus infection that they cannot clear.
Interestingly enough, many herpes family viruses including Epstein-Barr virus and cytomegalovirus posses the viral genes to make a fake version (homolog) of IL-10, to fool the immune system to shifting to Th2. Ref:
1. But this is the first time I have come across enterovirus using IL-10 to fool the immune system. From your quoted study, it seems that enteroviruses may not have the genes to make their own IL-10, but CVB4 is able to induce the secretion of actual human IL-10, as an immune evasion strategy.
If you
search Google, there are some studies examining the important role of IL-10 in maintaining viral persistence, and how persistent viral infections can be cleared by blocking IL-10
Arbidol might thus be a good general immunomodulator to add to the oxymatrine protocol, as Arbidol seems to address one of the possible causes of the Th2 dominance, namely this CVB4 induced secretion of IL-10 (and perhaps other enteroviruses might also induce IL-10 secretion).
Plus Arbidol has direct antiviral effects against CVB3, CVB4 and CVB5, in addition to its immunomodulatory action on IL-10. I don't think the antiviral effects will help that much in chronic infections though, because their mechanism of action is via preventing viral entry to the cell. Ref:
1 Although
this study found that Arbidol also decreased the level of CVB5 RNA in infected cells, which perhaps may help combat chronic non-cytolytic enterovirus infections.
So in enterovirus-associated ME/CFS, Arbidol might best be used as an immunomodulator, perhaps to help augment the immunomodulatory effects of oxymatrine or inosine.
The LD50 of Arbidol is more than 4 grams per kg (ref:
1), so this drug may be safe to take in high doses.
Arbidol (umifenovir) can be bought at the following online pharmacies that specialize in Russian pharmaceuticals:
http://medicinesdelivery.com/index.php?route=product/search&search=Arbidol
http://pharmashipping.net/index.php?route=product/search&filter_name=Arbidol
https://extrapharmacy.ru/index.php?route=product/search&search=arbidol
https://medik24.net/index.php?route=product/search&filter_name=Arbidol
http://rupharma.com/arbidol/
https://pharmalad.com have Arbidol for sale, but their website is in Russian; they do however ship internationally.