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A new Class of drug to treat herpes simplex virus infection

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FireMountain

 

For patients with the herpes simplex-1 virus (HSV-1), there are just a handful of drugs available to treat the painful condition that can affect the eyes, mouth and genitals.

If patients develop resistance to these drugs, there are even fewer choices left to treat the infection, which lasts for life.

Researchers at the University of Illinois at Chicago have now identified a small drug molecule that can clear the HSV-1 infection in the cells of the cornea — the clear outer layer of the eyeball — and works completely differently than the currently-available drugs, making it a promising potential option for patients who have developed resistance.

Tejabhiram Yadavalli, Deepak Shukla and Alex Agelidis

Study authors Tejabhiram Yadavalli, Deepak Shukla and Alex Agelidis. (Photo: Jenny Fontaine)

The researchers believe the drug could be equally effective in treating HSV-1 in the mouth and HSV-2 —which primarily affects the genitals — and possibly even other viral infections like HIV. The findings are reported in the journal Science Translational Medicine.

HSV-1 is one of the most common human pathogens, affecting between 50 percent and 90 percent of people worldwide. HSV-1 primarily infects the mouth and eyes, although genital cases of HSV-1 infection are on the rise. The virus is transmitted through bodily fluids. It establishes a lifelong infection that leads to sores in affected tissues when active and hides in nerve cells during its latent phase. The infection can be temporarily eliminated in the eye using oral and topical antiviral drugs, but inflammation of the cornea can persist indefinitely, requiring ongoing treatment with steroid-based eye drops. HSV-1 infection is a leading cause of infectious blindness in the U.S.

Currently available drugs to treat HSV-1 infection work by preventing the virus from producing the proteins it needs to replicate and are known as nucleoside analogs. Resistance is a significant problem with the ongoing use of nucleoside analogs, which when applied topically to the eye can cause serious side effects including glaucoma.

“We have needed alternative drugs that work on new targets for a very long time because patients who develop resistance to nucleoside analogs have very few good options for treating their infection,” said Deepak Shukla, the Marion Schenk Professor of Ophthalmology and professor of microbiology and immunology in the UIC College of Medicine, and corresponding author on the paper. “We have found a molecule that works in a totally novel fashion. Instead of working on the virus, it works in the host cells and helps them to clear the virus.”

Shukla and colleagues discovered that a small drug molecule called BX795, which is sold to labs for use in experiments, helped clear HSV-1 infection in cultured human corneal cells, in donated human corneas, and in the corneas of mice infected with HSV-1.

The researchers were quite surprised by their finding because BX795 is known as an inhibitor of TBK1, an enzyme involved in innate immunity and neuroinflammation. When TBK1 is suppressed in cells, infection is actually promoted. But when the researchers added higher concentrations of BX795 to cultured human corneal cells infected with HSV-1, the infection was quickly cleared. They had the same result in intact human corneas, and in mice whose eyes had been infected with HSV-1.

“This isn’t what we expected,” said Tejabhiram Yadavalli, a postdoctoral fellow studying herpes viruses at UIC and a co-author of the paper. “Instead of promoting infection, at higher concentrations, BX795 actually helped cells clear the infection.”

Additionally, the concentration of BX795 needed to clear HSV-1 infection is quite low.

“We saw clearance of the virus at concentrations of BX795 that were five times lower than concentrations of antiviral compounds in available nucleoside analogs,” Shukla said.

The researchers also found that BX795 only worked in cells infected with the HSV-1 virus.

“There was no discernable toxicity or negative side effects at therapeutic concentrations in cells that are not infected with the virus,” Shukla said.

“Because BX795 targets a common pathway that many viruses use to replicate inside the cell, it could be a new kind of broad-spectrum antiviral that might be used to treat other viral infections, including HSV-2, which primarily affects the genitals, and HIV, although we have not yet tested it on viruses other than HSV-1.”

“It will be very exciting to see if the study can move to a clinical trial soon,” said Alex Agelidis, a graduate student at UIC and co-author on the paper. “Because of BX795’s low toxicity, it has a great potential for systemic use as well as topical application.”

Dinesh Jaishankar, Abraam Yakoub, Alex Agelidis, Neel Thakkar, Satvik Hadigal and Joshua Ames, from the University of Illinois at Chicago, are co-authors on the paper.

This work was supported by grant R01 EY024710 from the National Eye Institute.

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Herpeguy562

Can someone ban this guy obviously this is a scam 

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floydmonk

I have read about BX795 before. There has been significant research into it. Thank you for posting this Fire Mountain. I was interested in purchasing the molecule when I first read about it a few months ago, some some chemlab or something. But it looks like they are making good progress on clinical trials, stating 2-3 years and they already have preclinical data.

Perhaps with something like this, plus traditional acyclovir, gHSV1 sufferers could attain a functional cure? I'd like to see some real clinical trial results on it.

 

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StayingUpbeat

This was discussed back in February...

 

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floydmonk
12 minutes ago, StayingUpbeat said:

This was discussed back in February...

 

Thank you for sharing that. Very resourceful.

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Shandawgs

If this has the potential to clear HSV-1 completely, I’m more than willing to take this in a pill form perhaps a vaccine whenever I have any contact towards my future partner, fingers crossed something happens soon. 

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Mountain Man
On 9/25/2018 at 2:36 PM, Herpeguy562 said:

Can someone ban this guy obviously this is a scam 

Not a scam.  You should read a bit before you call for a ban.

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StayingUpbeat

Correct, the article on this research compound (not really possible to call it a drug yet) is not a scam however two things should be kept in mind.

  1. There is an (at least) 10 year gauntlet of animal and human testing prior to BX795 being available as a drug.
  2. BX795 would be another chronic antiviral (i.e. it doesn't propose to clear the virus from latently infected neurons)

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Hopefullyhopeless

Not convincing anyone to believe blindly. But alot of people on here sound like they dont want a cure.

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StayingUpbeat
On 9/25/2018 at 10:45 PM, floydmonk said:

I have read about BX795 before. There has been significant research into it. Thank you for posting this Fire Mountain. I was interested in purchasing the molecule when I first read about it a few months ago, some some chemlab or something. But it looks like they are making good progress on clinical trials, stating 2-3 years and they already have preclinical data.

Perhaps with something like this, plus traditional acyclovir, gHSV1 sufferers could attain a functional cure? I'd like to see some real clinical trial results on it.

 

Given the experience of users on this site taking a combination of Valtrex and Amenamevir I'm not exactly sure what another compound would bring to the picture for what you're describing unless your expectation is that (falsely) BX795 + valtrex would somehow clear the latent infection.

 

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byornk
On 11/10/2018 at 8:41 PM, StayingUpbeat said:

Correct, the article on this research compound (not really possible to call it a drug yet) is not a scam however two things should be kept in mind.

  1. There is an (at least) 10 year gauntlet of animal and human testing prior to BX795 being available as a drug.
  2. BX795 would be another chronic antiviral (i.e. it doesn't propose to clear the virus from latently infected neurons)

For comparison, it's worth pointing out that Pritelivir has been researched as early as 2002 (perhaps even as early as 1998):

https://www.nature.com/articles/nm0402-392

It's only very recently been fast-tracked by the FDA.

So on the downside, this is a long time--but on the upside, the drug hasn't changed at all since then, so daring individuals could have been making personal use of it for years.

Edited by byornk

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