I have a couple of questions about T lymphocytes and HIV. I would greatly
appreciate if anyone could answer my questions, give hints, or anything!
So, here goes:
1- It is known that the HIV virus infects helper T cells, and that its
"entry" is done by attaching to the CD4 on the T cell surface. If T
cells expressed class I MHCs, then cytotoxic T cells could recognize
and destroy helper T cells infected with a strange virus. Now, my
questions on this point are:
a) Does the infected helper T cell produce virus peptides after
its entry?
b) Why the helper T cells do not express class I MHCs on their
surface like so many other body cells? By the way, do cytotoxic
T cells express them?
2- I understand there are two classes of HIV virus identified, namely
HIV-1 and HIV-2. What are the differences between them?
That's it. I would like to thank in advance to anyone replying to my
questions. If possible, I prefer that you mail me your opinions/answers.
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|"Old astronomers never die, |
| they just stargaze closer to the sky." |
| Joao Batista <df20728 at einstein.cc.fc.ul.pt> |
| http://einstein.cc.fc.ul.pt/~df20728/ |
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