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More MS news articles for September 2003

Epicutaneous Immunization with Autoantigenic Peptides Induces T Suppressor Cells that Prevent Experimental Allergic Encephalomyelitis

http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=14499108&dopt=Abstract

Immunity. 2003 Sep;19(3):317-28
Bynoe MS, Evans JT, Viret C, Janeway CA.
Section of Immunobiology, Yale University School of Medicine and Howard Hughes Medical Institute, 06520, New Haven, CT, USA

Information on how suppressor/regulatory T cells can be generated directly in vivo and prevent autoimmunity remains fragmentary.

We show here that epicutaneous immunization (ECi) with the immunodominant peptide of myelin basic protein (MBP), Ac1-11, protects mice that are transgenic for an Ac1-11-specific T cell receptor against both the induced and spontaneous forms of experimental allergic encephalomyelitis (EAE).

This protection was antigen specific and antigen dose dependent, and was mediated by CD4(+)/CD25(-) T cells whose suppressive activity required cell-cell contact and could transfer protection to naive recipients.

These ECi-induced suppressor T cells controlled naive MBP-specific CD4 T cells by inhibiting both their activation and their capacity to secrete IFN-gamma.

There was no CD4 T cell infiltration in the brain of protected mice.

Finally, ECi with autoantigenic peptides protected two nontransgenic models from relapsing-remitting EAE in an antigen-specific and antigen dose-dependent manner.