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HIV Transmission Captured On Video

Technology Review has promising news on the AIDS front: researchers have captured HIV T cell transmission on video. The upshot could be new avenues of treatment. "The resulting images and videos show that, once an infected cell adheres to a healthy cell, the HIV proteins... migrate within minutes to the contact site. At that point, large packets of virus are simultaneously released by the infected cell and internalized by the recipient cell. This efficient mode of transfer is a distinct pathway from the cell-free infection that has been the focus of most prior HIV studies, and reveals another mechanism by which the virus evades immune responses that can neutralize free virus particles within the body."

27 of 136 comments (clear)

  1. There is a way to beat the HIV virus by Anonymous Coward · · Score: 5, Funny

    I have an idea how to stop HIV and it involves the same technology found in terminator seeds.

    In a nutshell, the government sanctions the agricultural giant Monsanto to engineer a new strain of HIV virus with a limited lifespan beyond a certain generation with ability to recode the DNA as it progresses. This virus could be hostile to all the known HIV strains out in the wild and force them out. People voluntarily get infected with this new virus as means of guarding against incurable HIV infections. Since this new virus can be regulated upon demand, Monsanto can then minimize the damage for a low monthly fee by supplying you with various off switches to reduce the infection. They could set up various plans depending on your budget. Silver and Gold plans would have limited side effects to encourage you to upgrade to the Platinum plan and get better viral sterilization methods.

    I think this could work.

    1. Re:There is a way to beat the HIV virus by Anonymous Coward · · Score: 2, Funny

      Welcome to Monsanto-land, where nothing can possibl-y go wrong.

    2. Re:There is a way to beat the HIV virus by interkin3tic · · Score: 2, Informative

      the government sanctions the agricultural giant Monsanto to engineer a new strain of HIV virus with a limited lifespan beyond a certain generation with ability to recode the DNA as it progresses

      Is that even feasible? I'm not a virologist, but adding a feature like this seems pretty complicated. Is there an easy way to do that, like adding one gene from another virus, or are you proposing we invent a whole new mechanism from scratch? Because we're really no good at that yet. Pretty much all the artificial genes that I'm familiar with are either genes we've copied from natural ones, or ones that are extremely rudimentary compared to natural ones.

      And though I have no experience in either virology or terminator seeds, I'd guess that terminator seed technology in no way can be applied to HIV. Plants and viruses don't reproduce the same obviously. Notably, the plants you're talking about seem to be sterile hybrids, the first generation is all you get. You're talking about some delayed fuse thing that would have a dominant negative effect after several replications. And of course, viruses don't mate to make the next generation. So the technology to my knowledge doesn't exist at all.

      Not saying it's impossible, just that I think we'd have better luck with other approaches. And of course, if you know of something specific to retroviruses that does what you're talking about, that's a different story. I'm not quite clear what "a limited lifespan beyond a certain generation with ability to recode the DNA as it progresses" but it seems like there would be simpler ways to create a dominant-negative acting virus than that. Expressing a truncated form of some viral coat protein might interfere with virus production for example.

      But the biggest problem is definitely the "People voluntarily get infected with this new virus" part. They won't wear a condom but they'll be willing to get infected with HIV before they get it?

      If you were trolling, good job, I really couldn't tell and wasted a lot of time.

    3. Re:There is a way to beat the HIV virus by justinlee37 · · Score: 2, Funny

      I think you got trolled. 10/10

    4. Re:There is a way to beat the HIV virus by FusionFox · · Score: 4, Informative

      The Simpsons:
      At Itchy And Scratchy Land (pre-death-robot-rampage)

      Helicopter Pilot: "Welcome to Itchy And Scratchy Land, where nothing can possibl-y go wrong"
      *Family looks at each other*
      Helicopter Pilot: "POSSIBLY go wrong... sorry, that's the first thing that's ever gone wrong..."

      Supposed to be a hint as to what will happen later in the episode.

    5. Re:There is a way to beat the HIV virus by Hurricane78 · · Score: 2, Funny

      And if your partner infects you, you will get sued for copyright violation.

      Just as with their (eg wheat) grains. 10 years prison. Minimum.

      --
      Any sufficiently advanced intelligence is indistinguishable from stupidity.
    6. Re:There is a way to beat the HIV virus by mauthbaux · · Score: 2, Informative

      I'm not a virologist either, but I have taken classes in the subject (some time ago, so don't take what I say as doctrine or anything). The idea of a competing virus does have some merit. IIRC, research was done on the topic with ex vivo models, but I don't think it ever made its way to animal subject or human trials.

      For this to work, you'd ideally want a virus which used the same antigen for cellular entry (gp120, CD40 ligand); this keeps your virus to the same cells that are susceptible to HIV, limiting your spread within the organism. As for an anti-HIV payload, you'd probably want to try siRNA transcripts targeted against HIV's Reverse Transcriptase or coat proteins. It would be fairly trivial to engineer your own virus to avoid the siRNAs. Select your upstream promoters very carefully and you can control the spread of your engineered virus to some extent.

      What you end up getting is a way to regulate how much HIV spreads within the organism. This *would not* prevent infection with HIV, but it theoretically *could* prevent AIDS. Making it work really depends on the specificity of the siRNAs and the choice of promoters/regulatory elements in your virus' design (antibody-activated promoters are a good idea).

      But like I said, it's been a while since my virology and recombinant DNA tech classes, so I'm sure there's plenty of necessary details that I'm leaving out.

      --
      "Operating systems suck: you're better off using only the BIOS" --trainsaw.com
  2. Re:Fascinating by srussia · · Score: 4, Funny

    I always found biology quite fascinating. All those little buggers that can kill a human just by sheer numbers.

    You should hang around statisticians then. They're a hoot!

    --
    Set your phasers on "funky"!
  3. Re:Fascinating by Anonymous Coward · · Score: 5, Funny

    Ok I'll bite ... "HIV Transmission Captured On Video" ... I can't be the first to think, its probably been caught on videos before now!

  4. Re:Fascinating by phoenix321 · · Score: 5, Insightful

    It's been caught on video many times before - and sold.

    Scary stuff, really.

    http://en.wikipedia.org/wiki/Lara_Roxx
    http://www.adultfilmdatabase.com/video.cfm?videoid=61710

  5. Re:Is it me or.. by interkin3tic · · Score: 3, Insightful

    The blurb does kind of make it sound that way, the third sentence in the actual science article cites a 1993 paper: "In vitro, infection with cell-associated HIV can be thousands fold more efficient than infection with cell-free virus."

  6. Here's a statistic for you by w1cked5mile · · Score: 2, Informative

    You'll just love this then. Humans have ten times more bacteria that human cells.

    1. Re:Here's a statistic for you by w1cked5mile · · Score: 5, Informative

      American Society for Microbiology (2008, June 5). Humans Have Ten Times More Bacteria Than Human Cells: How Do Microbial Communities Affect Human Health?. ScienceDaily. Retrieved March 29, 2009, from http://www.sciencedaily.com­ /releases/2008/06/080603085914.htm

  7. Re:Fascinating by palegray.net · · Score: 2, Interesting

    You're currently modded at -1, but upon reading your reply I wondered if you were actually infected and demonstrating a remarkable sense of humor about it. I say that as someone who knows a really remarkable human being (a linguistics guy who speaks and tutors in seven languages) who has been infected for 16 years, and by some miracle is still alive. If you're not infected, that was a pretty bad joke. If you are actually infected, you've earned some respect for being strong enough to be witty about it.

  8. Re:Fascinating by Anonymous Coward · · Score: 3, Insightful

    I disagree. This assumption of everyone being racist/homofobic/etc. until they "prove" that they aren't by belonging to the group in question is offensive to me as a nonracist, etc..

    The joke was the same regardless of who said it because the end result for us readers is the same. If it is something that can make us laugh, it is good. If not, it isn't.

    And for the record, I think it was a pretty sucky joke regardless of the poster's health. -1 is appropriate

  9. Re:Why... by Chlorine+Trifluoride · · Score: 2, Informative

    No, because of the title. "HIV Transmission Captured On Video"

  10. Re:Fascinating by Jeian · · Score: 5, Informative

    > Roxx, on learning about James being HIV-positive, said, "It totally made me realize how I trusted this system that wasn't to be trusted at all, because it obviously doesn't work," and "I thought porn people were the cleanest people in the world."

    "The system" in this case is inherently flawed.

    After initial HIV infection, it can take up to six months for someone to start producing HIV antibodies (seroconvert). And unfortunately, most HIV tests don't check for viral load, but check for the presence of antibodies.

    So basically, you have a window period of up to six months where you are contagious but will come up negative on tests.

  11. Re:If only HIV killed instantly.. by Anonymous Coward · · Score: 2, Interesting

    Google the term "bugchasing."

    There's a subset of the gay community whose philosophy is basically that since we're all going to die anyway, they might as well get HIV so they can stop worrying about getting HIV.

    Then if you really want your mind fucked with, Google "giftgiving."

  12. Re:Fascinating by Forge · · Score: 4, Funny

    Patients on the chemotherepy ward were discussing how Cervical Cancer is more prevalent in women who start having sex early, have sex often and/or with multiple partners.

    The conclusion they came to is that excess stimulation of a sexual nature actually causes the cancer to develop. The guy with testicular cancer nodded approval, the woman with Brest cancer started to cry, The woman with throat cancer managed to cough out "not true".

    The guy with Prostate Cancer ran away screaming "I am not gay. I am not gay"

    There. See, people can joke about Cancer patients.

    --
    --= Isn't it surprising how badly I spell ?
  13. Re:If only HIV killed instantly.. by pjt33 · · Score: 4, Insightful

    No, if it killed instantly then people wouldn't need to be careful not to get it because it would be extremely rare (unless it had a very common transmission vector which it didn't kill).

  14. AIDS pulling a revolutionary new trick by v1 · · Score: 4, Interesting

    I think the interesting part about this discovery is that aids is traveling from cell to cell without the need to release virons to float around hoping to find a cell. I don't recall hearing about any other virus that spreads by cell-to-cell contact. It appears as though the infected cell press up against an uninfected cell, form a pocket between them (that is not connected to "outside" and then release some virons into this pocket. The virons contain the necessary "key" to get into a cell, but normally their odds are not good simply because they have to float around and hope to bump into a T cell, one at a time, in just the right way.

    This process has several advantages. First, it's not wasting virons by simply multiplying them inside the cell until the cell bursts, leaving the virons to float around hoping for a chance contact. Second, since the body isn't being flooded with virons, it severely delays and slows the auto immune response of the body which isn't going to react anywhere near as fast to such a low-volume threat of a handful of virons leaking out now and then vs thousands popping onto the scene continually. Third, in addition to being hand-delivered to a target cell, there's a ton of them at the contact site concentrated right on the target cell's doorstep, not just one, so infection is pretty much guaranteed.

    It's sort of the difference between a country sending an "army" to their enemy, by stirring up a villagefull of people to go attack on their own individually, vs assembling a strike force and attacking at one spot on the wall all at once. Clearly the latter is more effective.

    Scarry stuff. AIDS looks to have evolved a very potent new method of infection. It's too bad we don't know more about how this process works. AIDS is probably throttling its viron production so the infected cell survives to infect other cells, rather than multiplying virons as fast as possible to get the most of them released into the body as fast as possible. Interferfon iirc slows the replication of AIDS virons inside the cell, so it makes sense that throttling an already throttled process should be an effective treatment.

    If a cell has been taken over and is personally going to another cell and staging an attack, this may be a very difficult problem to overcome. Small, relatively inert virons can only hope for a chance contact in just the right way with a target cell. An entire cell coming to get you is a bit more like a bacteria problem, they have a heck of a lot more resources at their disposal. It's like the enemy taking over one of your tanks, vs coming at you as a walking soldier. Difference is, when the enemy "gets you", he doesn't destroy your tank... he dumps some men INTO your tank and now he has TWO tanks.

    What this all boils down to is AIDS has found a new way to use the cells it hijacks. Most other viruses use them as self-destructing viron factories, and a few as places to hide and lay dormant for later relapse. But using cells as lingering attack platforms is just plain scarry.

    --
    I work for the Department of Redundancy Department.
    1. Re:AIDS pulling a revolutionary new trick by Matt+Perry · · Score: 2, Insightful

      You first.

      Ah, the old "you first" defense; The shield of the coward. That's okay. I'll play along.

      The person that I replied to was mixing up the usage of HIV and AIDS. Every time he said AIDS, he should have said HIV for his sentences to make sense. People often use the terms interchangeably but they are different things. HIV is a virus and it's that virus that infects people. AIDS is a syndrome that HIV infected people can, and usually do, develop sometime after infection. AIDS isn't transmissible any more than depression, dementia, or mental illness is.

      When the poster made statements such as "What this all boils down to is AIDS has found a new way to use the cells it hijacks", what he meant to say was "What this all boils down to is HIV has found a new way to use the cells it hijacks."

      People who deny that HIV causes AIDS are making an extraordinary claim, and they need to supply extraordinary proof.

      I agree. No one has made any such claim in this thread that I am aware of.

      --
      Slashdot: Failed Car Analogies. Amateur Lawyering. Anecdote Battles.
  15. Re:Is HIV dangerous? It's a "consensus" anyway... by shrimppesto · · Score: 5, Informative
    HIV causing AIDS? It's a consensus that has an overwhelming amount of evidence to back it up. I won't even begin to try to summarize it all, but I will describe the gist of it.

    Causality between a microorganism and disease is commonly established through the demonstration of Koch's Postulates. These are not hard-fast rules; some of Koch's Postulates are difficult to prove through ethical experiments. However, in the case of HIV, all of Koch's Postulates have been fulfilled:
    1. The microorganism must be found in abundance in all organisms suffering from the disease. The virus has been isolated from every patient with AIDS. On top of that, people have sequenced its genome, elucidated its structure, and taken a picture of it.
    2. The microorganism must be isolated from a diseased organism and grown in pure culture. The virus has been isolated from patients with AIDS, and grown in culture. Critics cite the fact that this is very difficult to do, and requires special conditions. Most scientists believe that such special conditions are necessary when you are trying to culture something like a retrovirus. Special requirements for growth are not unique to HIV; for example, no one has ever successfully cultured a pathogenic strain of Treponema pallidum (syphilis) in vitro, but anyone who has ever had syphilis will tell you it is a VERY real disease.
    3. The cultured microorganism should cause disease when introduced into a healthy organism. When introduced into a healthy individual, the HIV virus has been found to cause disease. It should be noted that this has only happened a few times in monitored environments, through needle-stick exposures; however, it would not be ethical to experimentally inoculate a healthy person with HIV. There is an overwhelming body of non-experimental evidence to support bloodborne and sexual transmission of the HIV virus, and the evidence shows that everyone who contracts HIV eventually gets AIDS - with OR without therapy.
    4. The microorganism must be reisolated from the inoculated, diseased experimental host and identified as being identical to the original specific causative agent. This has been demonstrated in the cases of needle-stick exposures.

    Anti-retroviral therapy - while itself is quite dangerous and filled with side effects - has nevertheless been shown in numerous studies to reduce morbidity and mortality in HIV+ patients. Anti-retroviral therapy has also been compared to placebo, and its effects have been found to be beneficial over placebo. Other studies, mostly performed in Africa, have examined the "natural history" (i.e. the untreated progression) of HIV infection; such studies have shown that the natural history of HIV infection leads to the severe immunocompromise characteristic of the AIDS syndrome, followed by death.

    Yes, there is plenty of money flowing into AIDS research and drugs. However, that fact fails to prove anything related to this discussion, one way or another. There was a point in time when the HIV-AIDS connection was, indeed, a hypothesis; many people cite evidence from that period of time in making the claim that HIV->AIDS is still a widely disputed theory. However, a careful examination of the current scientific evidence will reveal an overwhelming body of evidence supporting a causal relationship between HIV and AIDS.

  16. Re:If only HIV killed instantly.. by Anonymous Coward · · Score: 2, Funny

    Or unless necrophilia is a lot more common than we currently suppose...

  17. consesus consmenshus by city · · Score: 3, Funny

    I'm still not sold. Can anyone from Kansas grab a science book and find me the section about the weaknesses of this "theory"?

    --
    I am a v1ral sig. Plse c0py me and h3lp me spread. Thank y0u?
  18. Re:Is HIV dangerous? It's a "consensus" anyway... by Matt+Perry · · Score: 2, Insightful

    James Hogan has written several blog posts on this topic.

    Blog postings from an anonymous nobody with no medical or biological education and training whatsoever. Yeah. That sounds credible.

    --
    Slashdot: Failed Car Analogies. Amateur Lawyering. Anecdote Battles.
  19. Re:Is HIV dangerous? It's a "consensus" anyway... by thesandtiger · · Score: 2, Insightful

    Then put your money where your mouth is - infect yourself willingly with HIV and don't take any treatments for it.

    Surely if it's harmless as cretins like Hogan say, then there's no reason for you not to do it and thus prove to the world that the HIV/AIDS connection is completely false. You would certainly win fame, prestige, riches beyond your wildest dreams for exposing it, right?

    --
    Since I can't tell them apart, I treat all ACs as the same person.