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- From: weemba@sagi.wistar.upenn.edu (Matthew P Wiener)
- Newsgroups: sci.skeptic
- Subject: Re: AIDS and the CIA (was Question)
- Message-ID: <97794@netnews.upenn.edu>
- Date: 16 Nov 92 14:30:57 GMT
- References: <1992Nov13.052956.22100@seanews.akita.com> <92318.150807SCW112@psuvm.psu.edu> <97736@netnews.upenn.edu> <92320.194233SCW112@psuvm.psu.edu>
- Sender: news@netnews.upenn.edu
- Reply-To: weemba@sagi.wistar.upenn.edu (Matthew P Wiener)
- Organization: The Wistar Institute of Anatomy and Biology
- Lines: 83
- Nntp-Posting-Host: sagi.wistar.upenn.edu
- In-reply-to: SCW112@psuvm.psu.edu
-
- In article <92320.194233SCW112@psuvm.psu.edu>, SCW112@psuvm writes:
- >>>That's why HIV remains dormant -- It's sitting inside your DNA until
- >>>something (some environmental factor) turns it on and you get AIDS.
-
- >>This is unknown. As a retrovirus, HIV forms DNA instructions for itself
- >>in host cells, and they join in with the rest of the chromosomes. The
- >>cell at some point uses the viral DNA as if it were its own, repeatedly.
- >>It will do this without any special environmental factor. Retroviral
- >>infection is, in fact, a common technique in the recombinant DNA world.
-
- >True, the cell will replicate&all progeny cells will contain the viral genes,
- >but just because you have lots of these cells doesn't mean you have AIDS,
- >Something has to make the cell go from the lysogenic to the lytic phase to
- >create more copies of virus. What? An environmental factor, maybe. We don't
- >actually know. It could just be a matter of time.
-
- You don't quite understand. Retroviruses don't need a lytic phase to
- spread. A retrovirally infected cell's life cycle now includes budding
- off new retroviruses now and then, slowly. The cell can do this without
- bursting. Which is part of the reason retroviral infection is a common
- technique, as mentioned above.
-
- In particular, I do not believe the HIV-kills-T-cells-causing-AIDS theory.
- I favor the network theories, which state that the immune response to HIV
- is the wrong response and actually causes the disease. And this response
- happens regardless of environment or ongoing cell lysis.
-
- >>>As to the reason why we don't have an HIV vaccine, it's easy to make
- >>>a vaccine. All a vaccine is is like a part of a virus that provokes
- >>>the immune system to create antibodies against that virus. We could
- >>>make an AIDS vaccine right now, I'm sure.
-
- >>No, we can't. A vaccine has to induce the correct immune response.
- >>We do have trial AIDS vaccines though.
-
- >What's a vaccine? It's something that makes your body produce
- >antibodies.
-
- Good grief. Everything induces antibodies. At this rate, the word
- "vaccine" won't mean anything.
-
- > Hell, _I_ could make an AIDS vaccine. Just take a bunch
- >of HIV viruses and kill 'em. That, if injected into a human, would
- >provoke an immune response.
-
- Yes. And you have no a priori knowledge of whether this will produce
- antibodies against HIV. Your method of killing could break the relevant
- proteins that end up expressed on cell surfaces.
-
- >As to whether that would make you immune to HIV, I'm not sure.
-
- That is the point. If you don't know, don't call it a vaccine.
-
- >>It is unknown why our body's response to HIV is a failure. This unknown
- >>is a major stumbling block in theorizing, let alone designing, an AIDS
- >>vaccine. The models that make the most sense to me say HIV uses judo.
- >>The immune system is thrown against the virus, and it misses, badly.
- >>If so, tinkering with this will not be easy.
-
- >That's why I don't think a vaccine is the way to go. Finding a cure would be
- >better, I think.
-
- But finding a cure is probably impossible. Read what I wrote. We don't
- know what's going on, and we only know how portions of the immune system
- work anyway, so fixing this after the fact is beyond current expectations.
-
- At the moment, prevention is the only way to go. That's it, and people
- don't want to hear it.
-
- >>That is only part of the problem, although a minor one according to
- >>most researchers. The other difficulty is HIV's high mutation rate.
- >>It's hard to hit a moving target.
-
- >True, but it's not mutation _that_ quickly, so it's a problem, but
- >not a huge, huge problem as long as a new mutation doesn't screw up
- >the part of the virus that you base your vaccine on.
-
- Welcome to the world of AIDS research. That *is* the problem. It mutates
- _that_ quickly. There are numerous candidate vaccines out there. They work
- beautifully in vitro. They fail in applications, because HIV mutates too
- fast.
- --
- -Matthew P Wiener (weemba@sagi.wistar.upenn.edu)
-