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New Ebola Drug 100% Effective In Monkeys

TrisexualPuppy writes "A team of scientists at Boston University has created a cure for the Ebola virus, first discovered in 1976. After setting the correct dosages, all monkeys tested with the vaccine survived with only mild effects. No tests have been performed on humans yet, as outbreaks happen infrequently and are difficult to track. Quoting NPR: '[The drug] contains snippets of RNA derived from three of the virus's seven genes. That "payload" is packaged in protective packets of nucleic acid and fat molecules. These little stealth missiles attach to the Ebola virus's replication machinery, "silencing" the genes from which they were derived. That prevents the virus from making more viruses.'"

22 of 129 comments (clear)

  1. Remember by Anonymous Coward · · Score: 5, Funny

    This does not mean you can eschew the use of a condom when fucking monkeys.

  2. Re:first post? by TrisexualPuppy · · Score: 5, Insightful

    I don't think it was 30 years ago.

    Exactly. I talked with one of my contacts at the Atlanta CDC about this. She said that little was said at that point about exactly how they procured this method, but it is something possible only with new technologies that have evolved in the past decade. That, and the limited amount of manpower dedicated to such a project mean that unless you're really lucky, it's going to take the full 30 years.

    I wonder how many lives will eventually be saved and what awards will be gotten because of this.

  3. This brings to mind... by eexaa · · Score: 4, Interesting

    ...wouldn't this be a great generic treatment for all infections by viruses?

    If not, I'd like to know the reason.

    1. Re:This brings to mind... by drinkypoo · · Score: 2, Interesting

      It sounds similar to Phage Therapy, long story short you have to identify and isolate the virus in question before you can treat it, because there are so many variants of most viruses you need tons of phages to treat what we the masses think of as a single virus. If Ebola doesn't change too much, or if they found critical parts of Ebola that never change between variants, it might be possible to attack those, but targeted approaches don't work against disparate viruses.

      --
      "You're right," Fisheye says. "I should have set it on 'whip' or 'chop.'"
    2. Re:This brings to mind... by nashv · · Score: 5, Informative
      The method with which the "drug" works is called RNA intereference. RNAi is more or less a standard method in molecular laboratories. Unfortunately, the efficacy of RNAi in different cells and for different proteins varies a lot, for reasons that are poorly understood. Further, RNA is rather unstable in water, and delivering substantial doses of RNA to cells in an organism has remainded challenging.

      Morever, all viruses do not start with an RNA-based genome. Some DNA based viruses use promoters for their genes that cause very strong expression of the genes, like the CMV promoter [PDF alert], which is used in isolation to create "over expression" in molecular biology. RNAi is typically very poor against such strong promoters.

      Ebola is a virus that is relatively slow replicating in the initial stages. It is not a particularly ingenious design as compared to say the flu virus. This gives the RNAi a chance to work against it.

      In short, I don't want to say _never_ (that'll just be ignorant), but as yet, RNAi needs a lot of research and is perhaps not the best strategy for all viruses.

      --
      Entia non sunt multiplicanda praeter necessitatem.
    3. Re:This brings to mind... by K.+S.+Kyosuke · · Score: 2, Interesting

      It sounds similar to Phage Therapy, long story short you have to identify and isolate the virus in question before you can treat it, because there are so many variants of most viruses you need tons of phages to treat what we the masses think of as a single virus. If Ebola doesn't change too much, or if they found critical parts of Ebola that never change between variants, it might be possible to attack those, but targeted approaches don't work against disparate viruses.

      What if one day we'll be able to synthesize a therapy while the patient is waiting in the waiting room? Just consider the leaps in DNA sequencing. Once a tedious manual process where we were lucky to decipher a few dozen nucleotides in a row, now a technology with the prospect of sequencing a person's whole DNA for a few dozen bucks. (I admit that I'm not aware of the precise state of the art today.) A century from now - if our civilization won't collapse in the meantime - we might be able to synthesize a viral disease killer for a virus we've never seen before in a few hours. Don't underestimate clever people with fast supercomputers and vast databases. Well, it this is a pipe dream, certainly much less so than, say, manned interstellar travel.

      --
      Ezekiel 23:20
  4. Re:Time for the SuperEbola? by Low+Ranked+Craig · · Score: 3, Informative

    This is not the same as antibiotics.

    --
    I still cannot find the droids I am looking for...
  5. 100% effective in FIVE monkeys by Tsu+Dho+Nimh · · Score: 3, Insightful
    Before you start declaring a CURE!!! look at the number of test subjects. Preventing death in five monkeys is not exactly a cure. It's a very promising start, but they need to test it in non-infected humans to make sure it's not going to cause some odd problems and to get max dosages worked out.

    Ebola's death rate is so high that this treatment would have to be extremely dangerous to keep it form being used. Death rates are in the 80-90% range now, so if it dropped them to even just 50% it's worth a large risk.

    1. Re:100% effective in FIVE monkeys by Anonymous Coward · · Score: 2, Insightful

      Five monkey more than you've cured.

    2. Re:100% effective in FIVE monkeys by phoenix321 · · Score: 4, Insightful

      A mortality rate of 80% of out 5 monkeys, 4 would have died. If 0 died in the vaccine group, it is a pretty significant finding.

      Maybe someone here can be bothered to draw up the exact significance, but I'm pretty sure it will be a percentage surprisingly high for a sample of 5 individuals, since the mortality is so high to begin with.

      For example with rabies, the mortality rate is a solid 100%. Managing to save even 1 infected individual is nothing short of a monumental achievement, as in all recorded history, we only have 3 survivors total, with Jeanna Giese being the first and the 2 others with the course derived from her treatment. - http://en.wikipedia.org/wiki/Milwaukee_protocol - so these 3 survivor make up a pretty high significance when compared to 0 before.

    3. Re:100% effective in FIVE monkeys by izomiac · · Score: 3, Informative

      At 85% mortality, the chance of all five monkeys surviving due to random chance would only be 15% ^ 5 = 0.0076%, which is well below the traditional alpha level of 5%. It'd take a mortality rate of 45% before you could say that, so for deadly diseases you don't need huge sample sizes to show effectiveness, though you would need a larger sample size to measure the size of the effect. The researchers have a very good claim that the treatment lowers the mortality rate of the tested strain of Ebola in monkeys. Of course, adapting this treatment to humans probably isn't going to be trivial. (You do have a point about "cure", though I think we all realize the overall quality level of science news reports in the popular media.)

    4. Re:100% effective in FIVE monkeys by Daniel+Dvorkin · · Score: 5, Informative

      The p-value is 0.00032 by my off-the-cuff calculation (pbinom(0, 5, 0.8) in R.) So yeah, it's pretty significant. That being said, sample sizes this small still do tend to make people nervous -- the p-value is calculated assuming that the monkeys in question represent a good sample of the population, and doesn't account for lab-specific or family-specific effects. (Where were the monkeys bred? How closely are they related? What sub-population do they belong to? Etc.) So we can certainly accept the finding for what it is, but regulatory bodies will, with good reason, want to see larger animal trials before approving even limited human use.

      --
      The correlation between ignorance of statistics and using "correlation is not causation" as an argument is close to 1.
  6. News, for Monkeys . . . by PolygamousRanchKid+ · · Score: 2, Funny

    . . . and now, on BBC, "News for Parrots"

    "No parrots were injured in Ebola tests . . ."

    --
    Schroedinger's Brexit: The UK is both in and out of the EU at the same time!
  7. Re:first post? by FatdogHaiku · · Score: 2, Interesting

    Also, the people that will need the drug have little or no ability to pay for it. It takes A LOT of money to get a drug approved, if the market for the drug itself is not there then the work just does not get done. The technique used will be applied to other, more profitable issues, so some good comes of it in the end.
    It might be worthwhile to give drug companies a tax break for donating information that leads to effective cures for less profitable conditions... I'm sure there are many substances that have shown potential to help conditions that only have a few tens of thousands of sufferers or have many very poor sufferers and are thus a net loss if developed via normal channels.

    --
    You have the right to remain sentient. If you give up the right to remain sentient, you will be elected to public office
  8. Re:first post? by Anonymous Coward · · Score: 2, Insightful

    Except that 2 weeks is not long to spread. AIDS kills so many because it takes so long to get to work.

  9. Re:Human testing by K.+S.+Kyosuke · · Score: 2, Funny

    Outside Africa, that's the generally accepted point of view.

    --
    Ezekiel 23:20
  10. Re:first post? by burnin1965 · · Score: 2, Informative

    the people that will need the drug have little or no ability to pay for it. It takes A LOT of money to get a drug approved, if the market for the drug itself is not there then the work just does not get done

    This is also an issue for people who can pay for a drug, even United States citizens who have health insurance. There have been recent news articles highlighting the fact that the United States is facing a shortage of various anti-venoms because corporations are either stopping production or never bothered to develop a manufacturing process because there is no significant profit potential.

    It might be worthwhile to give drug companies a tax break for donating information that leads to effective cures for less profitable conditions

    This is an excellent idea but I would even go so far as to suggest taking out the "leads to effective cures" requirement as it can take a long time to reap the benefits and corporations would be more likely to utilize the offer if it provided an immediate tax benefit.

    The recent move by GlaxoSmithKline that we all read about is a good example of a case where a corporation should be given a tax break.

    However, tax breaks are far from enough. The only reason GSK was even researching a malaria vaccine was because of the huge profit potential from millions of infections globally. There are numerous ailments that will never receive corporate financing because there is no profit motive. Note the scorpion anti-venom case in the previously mentioned article where all the anti-venom is produced non-profit by a university professor and no corporation is willing to step up to create and sell a product.

    Ultimately there are a vast number of medical and non-medical ventures that should be funded by the public because they do not present any significant profit potential to entice corporations but society would gain both tangible and intangible benefits.

    Sadly the direction the United States appears to be headed is to a purist position of worship and submission to the almighty corporation, gross margins and a "greed is good" mentality. This can be seen in reading some of the articles on the anti-venom issue that suggest a solution is tort reform and easing of FDA regulations. Of course these arguments are a misnomer as these proponents admit themselves that the issue is a lack of profit potential and the suggested tort reform and easing of regulations are likely a one time benefit on the Internal Rate of Return calculation used to determine if a project is financially viable. The end result would still be no cures or research for low or no profit situations with the addition of federal protection for corporations against law suits from the public and elimination of regulations that are in place to help prevent the conditions that result in law suits in the first place.

  11. how many monkeys by Reed+Solomon · · Score: 2, Funny

    how many monkeys did they test? 12?

  12. Re:first post? by RDW · · Score: 4, Informative

    'She said that little was said at that point about exactly how they procured this method, but it is something possible only with new technologies that have evolved in the past decade.'

    Yes, their method clearly depends on RNAi (RNA interference), for which the key paper only came out in 1998, and the Nobel Committee obviously didn't regard the discovery as 'simple enough'!:

    http://nobelprize.org/nobel_prizes/medicine/laureates/2006/adv.html

    It wasn't until 2001 that RNAi was demonstrated in mammalian cells, so its use as a standard tool in molecular biology only dates back to the last decade. To apply this sort of strategy to Ebola also requires knowledge of its genome sequence, which also wasn't complete until the 90s, as well as an effective method of getting the active molecules into infected cells (like the lipid-based packaging approach used here). There is indeed active research aimed at applying RNAi to other viruses, including HIV, but it's far from straightforward.

  13. Re:Time for the SuperEbola? by Artifakt · · Score: 2, Insightful

    OK, you've just said something that is nearly 100% true, but has almost no meaning outside of the context you've left out. RNA mutates just as DNA does, and is subject to selection in theory. So, an RNA based virus can evolve. But, there are important differences.
          1. Just about every gene in a virus is vital, as that same evolutionary pressure selects to weed out all the junk code at a much higher rate. The penalties a virus pays for hauling any gene not vitally needed are so big, it has to hijack something else's reproductive code to duplicate itself. So just about every mutation in the remaining code is seriously negative - positive mutations in 'advanced' organisms are rare, but for viruses they are literally millions of times rarer.
          2. RNA based organisms are all non-sexual reproducers, so there is no second copy of anything from chromosome pairing, to take up slack for any gene that gets damaged either. That probably further amplifies the effects of point 1.
          So, you get lots of mutation in viruses, but very little evolution because there are almost no positive selection events associated with that mutation. Scientists have even come up with the term Stochastic mutation to describe what some viruses do (HIV for one). In such cases, you get regular mutation at certain key points, but no essentially NO selection. HIV may eventually mutate in a fashion that is subject to selection pressure in the wild, but the four common stochastic mutations it displays won't be the path to any such changes.
            Overall, viruses have very fast reproductive cycles, i.e. an HIV virus will typically reproduce between 100 and 200 copies in 1 1/2 to 2 days. If it weren't that there's so little selection pressure, they would likely overwhelm us "higher" life-forms totally.

    --
    Who is John Cabal?
  14. Re:Human testing by Anonymous Coward · · Score: 2, Funny

    That is stupid. No animal is worth more than another animal, humans included.

    You want to solve a human problem? Use humans.

    Wow... Someone needs to be taken for a walk

  15. Pool's closed. by ciderVisor · · Score: 2, Funny

    they die very, very quickly if exposed to many common environmental stressors other germs resist, for example, pool Chlorine

    Then explain why, at the hotel near me, the pool was closed due to AIDS.

    --
    Squirrel!