[Immunology] Re: Model for determination of APC funtion in vivo
Ian A. York
iayork at panix.com
Thu May 25 08:22:13 EST 2006
In article <mailman.1091.1148553772.16885.immuno at net.bio.net>,
Shankar, Vijay <Vijay.Shankar at med.uni-heidelberg.de> wrote:
>Briefly there exists a BM1 mice which is deficient for the binding of
>SINFEHKL peptide. This mice can be used for the transplantation of APC
>from the same strain of mice to present the ovalbumin(SINFEHKL) via
>MHCII. CD8 T cell proliferation of the transplanted cell type can be
>determined using the T cells from OT1 mice. Does BM2 mice exist at all,
>bcos OT2 mice do exist.......
I'm a little puzzled here. "SINFEHKL" is not an ovalbumin epitope and the
sequence doesn't exist in chicken ovalbumin. The commonly-used ovalbumin
epitope is "SIINFEKL", but that doesn't bind to MHC class II, it binds to
MHC class I. ("SINFEHKL" might bind to MHC class I but is very unlikely
to bind to class II, since it's much shorter than any MHC class I-binding
peptide I've heard of.) So I'm not at all sure what it is you're hoping
OTII mice do exist, but they recognize "ISQAVHAAHAEINAGR".
Measuring capacity of APC to present antigen is fairly straightforward, in
general -- you can load APC in vitro with peptide, or infect them with
virus or whatever, and then transfer them into mice and measure expansion
of the specific T cell set you're after.
As I say I'm not quite sure what it is you want to do.
Ian York (iayork at panix.com) <http://www.panix.com/~iayork/>
"-but as he was a York, I am rather inclined to suppose him a
very respectable Man." -Jane Austen, The History of England
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