More MS news articles for Mar 2002

Experimental autoimmune encephalomyelitis induction in naive mice by dendritic cells presenting a self-peptide

http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=11869358&dopt=Abstract

Immunol Cell Biol 2002 Feb;80(1):14-20
Weir CR, Nicolson K, Backstrom BT.
Malaghan Institute of Medical Research,Wellington School of Medicine, Wellington, New Zealand.

Self-reactive T cells escape deletion in the thymus and are found in the peripheral repertoire.

Because bone-marrow-derived dendritic cells (BM-DC) are potent activators of antigen-specific T cells, these cells could theoretically activate self-reactive T cells leading to autoimmunity.

We investigated whether BM-DC could induce the autoimmune disease experimental autoimmune encephalomyelitis (EAE).

Our results show that transfer of BM-DC presenting a self-peptide from the myelin oligodendrocyte glycoprotein (MOG35-55) into naive mice induced EAE 7--14 days later.

MOG35-55-specific T cells of the Th1 phenotype were present in the lymph nodes and spleens of mice that received live peptide-pulsed BM-DC.

Heat-killed or formaldehyde-fixed BM-DC presenting MOG35-55 could induce neither clinical signs of EAE nor a measurable T-cell response in vitro.

These data show that live BM-DC presenting a self-antigen can induce the organ-specific autoimmune disorder EAE in a non-transgenic system.

Therefore, this new EAE model could be used as a more clinically relevant model for the human disease multiple sclerosis.

These findings could also have implications for the use of DC immunotherapy in a clinical setting.