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- W2000363224 abstract "Objective. To investigate the expressions of costimulatory molecules CD86 (B7-2, B70) and CD28 by cells obtained from the synovial tissues (ST) and synovial fluids (SF) of patients with rheumatoid arthritis (RA). Methods. Monoclonal antibodies (MAb) against CD86 and CD28 were used for immunochemical study of synovia from 18 RA patients, 4 osteoarthritis (OA) patients, and 4 normal subjects. These MAb were also used for flow cytometry of isolated ST cells from 8 RA and 5 OA patients and of SF mononuclear cells from 5 RA and 5 OA patients. Results. Immunohistochemical examination revealed that CD86+ cells occurred in 11 of the 18 RA synovia, but in none of the 4 OA or 4 normal synovia. Most of the positive cells had macrophage-like morphology, and surrounded lymphoid aggregates. Most cells within lymphoid aggregates were stained positively for CD28. Flow cytometry showed that CD86+ cells comprised 2.9–33.4% (average 14.3%) of the total ST cells and 2.1–14.9% (average 6.1%) of the total SF mononuclear cells from RA patients. Approximately 40% of the CD86+ cells expressed CD14. A majority (mean 72%, range 57–89%) of the T cells in ST and SF expressed CD28. RA synovia expressed more CD86 molecules than did OA synovia (mean frequency of positive cells 14.3% versus 2.8%; mean fluorescence intensity 104.6 versus 40.9). Conclusion. This study has shown that the expression of the CD86 molecule was up-regulated in RA synovia. The CD86+ cells appeared macrophage-like and surrounded CD28+ cells in lymphoid aggregates. The simultaneous presence and close localization of CD86+ and CD28+ cells in the RA synovial compartment suggests that their interaction potentially contributes to the sustained immune activation of RA." @default.
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- W2000363224 date "1996-01-01" @default.
- W2000363224 modified "2023-10-08" @default.
- W2000363224 title "The presence of costimulatory molecules CD86 and CD28 in rheumatoid arthritis synovium" @default.
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- W2000363224 doi "https://doi.org/10.1002/art.1780390115" @default.
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