Monday, October 30, 2017

ICP and Herpies

   In Bob Siegel's Humans and Viruses course last week a guest by the name of Erin came in to teach about how the role a protein known as ICP plays in a herpes infection.
  She described it made is seem like herpies was able to give off a certain signal that kept all antiviral cells away allowing to live in the body's cells for seemingly forever.  With a little digging it turns out that researcher have been wondering how the herpies virus evades the immune system for decades.
  Impressively the virus has developed a few ways to hajack a host's immune family.   It has several different ways of confusing CD8+ lymphocytes and to become a very infective virus. 
  Herpes simplex virus, when it enters the cell encodes for the cell to produce fewer MHC class 1 molecules. With less MHC I then the lymphatic cells cannot tell that the host cell is infected at all, and the herpes virus can lay low, in latency. The really interesting part though is that when herpes wants to end its latency, it does not just knock out the MHC receptors, but it also reduces the amounts of ICP 47 that the cell has.  ICP 47 then attacks the transporter that allows antigens within the MHC Class 1: Without this transporter herpes do not have to worry about being attacked by immune cells that normally would spot viral proteins being produced and then mark the cell for destruction.

2 comments:

johnson judith said...

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Ryan Archer said...

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