Gene/Protein Disease Symptom Drug Enzyme Compound
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Query: UMLS:C0003873 (rheumatoid arthritis)
 53,068 document(s) hit in 31,850,051 MEDLINE articles (0.00 seconds)

Cell surface expression of HLA-DR, DQ and DP antigens on synovial fluid (SF) T cells was analyzed in 43 patients with rheumatoid arthritis. Marked increase in the positive expression of all 3 Ia antigens was observed in the SF T cells compared to the counterpart, peripheral blood T cells. Both the DNA and RNA content of HLA-DP+ T cells were analyzed using acridine orange stain. RNA content in the HLA-DP+ SF T cells increased in comparison to that in the HLA-DP- SF T cells or normal peripheral blood T cells. Our findings suggest that majority of the SF T cells are activated and express HLA-DP antigen, while not proliferating.
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PMID:HLA-DR, DQ and DP antigen expression in synovial fluid T lymphocytes in rheumatoid arthritis: cell cycle analysis of HLA-DP positive T cells. 169 Mar 1

HLA-DR, HLA-DQ, and HLA-DP antigen expression was assessed by immunofluorescent flow cytometry on monocytes from 19 patients with active multiple sclerosis (MS), 19 with inactive MS, 7 patients with early active rheumatoid arthritis (RA), and 19 normal controls. Percentage positivity and median channel fluorescence (MCF) were determined after separation of the monocytes (TO) and following 48 h culture with (T48 + IFN) and without (T48) recombinant gamma interferon (rIFN-gamma). The percentage positivity of the cells was normal at TO for all groups of patients for each of the HLA types but statistically significantly increased above normal, on monocytes from patients with inactive MS, after culture with rIFN-gamma. At TO, the MCF values for HLA-DQ, and HLA-DP were statistically significantly increased above normal on monocytes from patients with active MS indicating some pre-programming of the cells in vivo. After culture, when the carry-over from baseline TO values was eliminated, the increment in MCF for HLA-DR, on monocytes from patients with inactive MS, was statistically significantly lower than normal in the non-gamma-IFN cultures but was normal in the presence of rIFN-gamma. Conversely, the increment in MCF for HLA-DP on monocytes from patients with active MS was significantly lower than normal after culture with rIFN-gamma. Therefore, the stimulation required to increase antigen density on cells already expressing antigen may be different to that required to stimulate de novo expression on negative cells. Both systems appear to be abnormal in MS, possibly reflecting differences in disease activity, while only one system appears abnormal in RA.
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PMID:Class II major histocompatibility complex antigen expression on unstimulated and gamma-interferon stimulated monocytes from patients with multiple sclerosis, rheumatoid arthritis and normal controls. 177 59