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    Mod Rheumatol. 2006;16(4):226-8.

    Altered peptide ligands control type II collagen-reactive T cells from rheumatoid arthritis patients.

    Source

    Division of Rheumatology, Department of Internal Medicine, Institute of Clinical Medicine, University of Tsukuba, 1-1-1 Tenodai, Tsukuba, 305-8575, Japan.

    Abstract

    We previously reported that peripheral blood mononuclear cells from HLA-DRB1*0101 Japanese patients with rheumatoid arthritis (RA) were highly reactive to 256-271 peptide of type II collagen (CII). In this report, we tried to regulate the CII reactivity of T cells from RA patients with HLA-DRB1*0101 by altered peptide ligand (APL), which is a single amino acid substitution of the T-cell epitope on CII 256-271 peptide. Antagonistic activity of 21 APLs was assessed using three different T-cell lines. Results showed that 262 (G-->A) APL of CII 256-271 exhibited antagonistic activity in all T-cell lines and it was suggested that the application of CII APL might be a new therapeutic strategy in the regulation of RA.

    PMID:
    16906372
    [PubMed - indexed for MEDLINE]

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