JOURNAL ARTICLE
RESEARCH SUPPORT, U.S. GOV'T, NON-P.H.S.
RESEARCH SUPPORT, U.S. GOV'T, P.H.S.
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Accumulation of T cells reactive to type II collagen in synovial fluid of patients with rheumatoid arthritis.

OBJECTIVE: To determine if type II collagen (CII) reactive T lymphocytes selectively accumulate in the inflamed joint of patients with rheumatoid arthritis (RA) and to study the specificity of the CII reactive cells.

METHODS: Synovial fluid (SF) cells or peripheral blood lymphocytes were cultured with interleukin 2 (IL-2) for 24 h and then cultured at limiting dilution concentrations in the presence of filler cells and IL-2. The outgrowing cell lines were screened for their responses to CII. The percentages of the CII reactive T cells from SF were compared with those from peripheral blood of patients with RA. The CII reactive T cell lines were tested for their responses to different types of collagen.

RESULTS: CII reactive T cell lines were identified in the SF of 3 RA patients; the frequencies were 5.0% (11/219), 3.7% (5/134), and 3.5% (3/86), respectively. In contrast, none of CII-specific T cell lines were identified in peripheral blood of the patients. The T cell lines recognized both human and bovine CII and, to a lesser extent, type I collagen.

CONCLUSION: CII reactive T cells are present in high frequency in the inflamed joint of patients with RA, where they may play an important role in the pathogenesis of RA.

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