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For the treatment of rheumatoid arthritis, efficient drug delivery methods to the inflamed joints need to be developed. Since T cells expressing an appropriate autoantigen-specific receptor can migrate to inflamed lesions, it has been reasoned that they can be employed to deliver therapeutic agents. In order to examine the ability and efficiency of such T cells as a vehicle, we employed an experimentally induced model of arthritis. Splenic T cells from DO 11.10 T cell receptor transgenic mice specific for OVA were transduced with murine IL-10. Adoptive transfer of the IL-10-transduced DO 11.10 splenocytes ameliorated OVA-induced arthritis, in spite of the presence of around 95% non-transduced cells. Using GFP as a marker for selection, the number of transferred cells needed to ameliorate the disease was able to be reduced to 10(4). Preferential accumulation of the transferred T cells was observed in the inflamed joint, and the improvement in the disease was not accompanied by impairment of the systemic immune response to the antigen, suggesting that the transferred T cells exert their antiinflammatory task locally, mainly in the joints where the antigen exists. In addition, IL-10-transduced DO 11.10 T cells ameriolated mBSA-induced arthritis when the arthritic joint was co-injected with OVA in addition to mBSA. These results suggest that T cells specific for a joint specific antigen would be useful as a therapeutic vehicle in rheumatoid arthritis for which the arthritic autoantigen is still unknown.

nihon rinshō men'eki gakkai kaishi/nihon rinshou men'eki gakkai kaishi

Antigen-specific T cells transduced with interleukin-10 ameliorate experimentally induced arthritis without impairing the systemic immune response to the antigen.