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  • Prostaglandin E2  (1)
  • TCR γδ + T-cells  (1)
Materialart
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  • 1
    Digitale Medien
    Digitale Medien
    Springer
    Rheumatology international 10 (1991), S. 235-239 
    ISSN: 1437-160X
    Schlagwort(e): Indomethacin ; Prostaglandin E2 ; IgM ; IgM-rheumatoid factor
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Medizin
    Notizen: Summary Indomethacin, which is thought to exert its therapeutic effect by inhibiting the synthesis of PGE2, is a commonly used first-line agent in the treatment of rheumatoid arthritis (RA). However, the effect of this drug on the humoral immune response in RA remains unclear. In this study, modulation of the in vitro synthesis of IgM and IgM-rheumatoid factor (RF) by indomethacin and prostaglandin E2 was examined in 11 patients with active RA and 10 normal controls. Indomethacin at a final concentration of 1 μg/ml significantly enhanced IgM production (P〈0.01) and RF production (P〈0.02) inStaphylococcus aureus Cowan I (SAC) stimulated RA cultures when compared to controls in whom no net enhancement effect was observed. In the patients, this increase in IgM production was more pronounced than the corresponding increase in RF synthesis (P=0.078), suggesting that IgM and IgM-RF-secreting RA plasma cells have different susceptibilities to PGE2 mediated suppression. Nonetheless, addition of PGE2 (10−8 M final concentration) to the cultures inhibited IgM and RF production to a similar degree in the patient and control cultures. These findings demonstrate that PGE2 causes suppression of IgM and IgM auto-antibody production in vitro and that inhibition of endogenous PGE2 synthesis in RA patients treated with indomethacin results in a marked increase in the production of these antibodies.
    Materialart: Digitale Medien
    Bibliothek Standort Signatur Band/Heft/Jahr Verfügbarkeit
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  • 2
    Digitale Medien
    Digitale Medien
    Springer
    Rheumatology international 11 (1991), S. 175-178 
    ISSN: 1437-160X
    Schlagwort(e): CD5+ B-cells ; TCR γδ + T-cells ; Gold sodium thiomalate
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Medizin
    Notizen: Summary Circulating CD5+ B-cell levels in 15 patients with rheumatoid arthritis (RA) not receiving remittive therapy was significantly increased when compared to 17 normal controls (mean±SE: RA, 19.7±2.85%; controls, 11.6±1.67%; P〈0.02). In contrast, 24 patients with RA receiving gold sodium thiomalate therapy (GST) had similar CD5+ B-cell levels (11.88±1.65) when compared to controls and significantly reduced levels when compared to the RA group not receiving remittive agents (P〈0.01). Furthermore, TCR γδ + T-cell levels were also assessed in these patients groups. These values were not significantly different between any of the groups (controls, 4.46±1.36%; GST, 6.88±1.73%; RA, 2.73±0.55%), although 42% of the GST treated group had γδ + T-cell levels higher than the entire untreated RA group. No correlation was observed between the levels of TCR γδ + T-cells and CD5+ B-cells in any of these groups. These results suggested that therapy does influence the level of CD5+ B-cells and γδ + T-cells in these patients.
    Materialart: Digitale Medien
    Bibliothek Standort Signatur Band/Heft/Jahr Verfügbarkeit
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