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  • 1
    Electronic Resource
    Electronic Resource
    Iron stores and serum transferrin receptor levels during recombinant human erythropoietin treatment of anemia in rheumatoid arthritis (1992)
    Springer
    Annals of hematology 65 (1992), S. 265-268 
    Details
    ISSN: 1432-0584
    Keywords: Erythropoietin ; Recombinant human ery thropoietin ; Anemia ; Rheumatoid arthritis ; Iron stores ; Transferrin receptor
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary Ten rheumatoid arthritis (RA) patients with anemia of chronic disorders (ACD) were treated with recombinant human erythropoietin (r-Hu-Epo) using a dose of 250 U/kg s.c. 3 times a week for 6 weeks, in order to evaluate its effects on the anemia, iron stores, and serum-soluble transferrin receptor (sTfR) levels. All patients showed a rise in hemoglobin (Hb). Median Hb increased from 5.9 (5.5–7.0) at baseline to 6.7 (5.8–7.8) at 3 weeks and to 7.2 (5.9–8.5) mmol/l at 6 weeks during treatment. Ferritin levels decreased significantly during the 6 weeks, and five patients were iron deficient after 6 weeks of treatment. TfR levels increased significantly at 3 and 6 weeks during treatment. These preliminary findings may indicate that r-Hu-Epo is effective in improving ACD in RA. The sTfR rise may be explained by an increase in erythroid precursor cell mass or increased TfR expression and a decrease in tissue iron stores, although direct effects of Epo on TfR regulation cannot be excluded. Large double-blind studies with r-Hu-Epo in patients with RA and ACD are warranted.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01836071
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  • 2
    Electronic Resource
    Electronic Resource
    NMR monitoring of rheumatoid arthritis patients receiving anti-TNF-α monoclonal antibody therapy (1997)
    Springer
    Rheumatology international 16 (1997), S. 249-255 
    Details
    ISSN: 1437-160X
    Keywords: Dynamic MRI ; Rheumatoid arthritis ; Biological response modifiers
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract The aim of this study was to investigate if dynamic gadolinium-DTPA-supported magnetic resonance (MR) imaging can monitor the therapeutic effect of a fast-acting immuno-modulating drug like anti-tumour necrosis factor alpha (anti-TNF-α) monoclonal antibody (moab) in patients with rheumatoid arthritis (RA). Dynamic MR imaging was performed on 64 joints in a total of 18 patients before and after infusion with either a placebo or 1 or 10 mg/kg of anti-TNF-α moab. Additionally, treating the placebo group and reinfusing the verum group with either 3 or 10 mg/kg was monitored by quantitative nuclear magnetic resonance (NMR). Time-dependent signal intensity changes were then correlated with a total of five Paulus criteria and with ESR and C-reactive protein (CRP). No changes in either the gadolinium uptake or clinical parameters were seen after the infusion of a placebo. Therapy with 1 mg/kg anti-TNF-α moab resulted in a significant decrease in clinical disease activity, as well as in gadolinium-DTPA uptake in dynamic NMR studies. However, correlations between signal intensity changes and Paulus criteria were only demonstrated for the variable “doctor's evaluation of disease activity”. Patients given 10 mg/kg moab demonstrated a very significant improvement in all clinical manifestations of their disease, as well as a high significant reduction in gadolinium uptake (P=0.004). In addition, the latter group showed significant correlations between time-dependent signal intensity changes and five Paulus criteria: “number of swollen joints”, “number of painful joints”, “duration of morning stiffness”, “doctor's evaluation of disease activity” and “patient's evaluation of disease activity”. No differences and correlations were seen for ESR and CRP. We concluded that dynamic NMR studies are suitable to monitor inflammatory activity in RA patients under therapy with biological response modifiers such as anti-TNF-α moab.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01375657
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    Evaluation of plasma C3d and immune complex determinations in the assessment of disease activity of patients with rheumatoid arthritis, systemic lupus erythematosus, and spondylitis ancylopoetica (1985)
    Springer
    Rheumatology international 5 (1985), S. 97-101 
    Details
    ISSN: 1437-160X
    Keywords: C3d ; Serum immune complexes ; Rheumatoid arthritis ; Systemic lupus erythematosus ; Spondylitis ancylopoetica ; Disease activity
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary Patients with rheumatoid arthritis, systemic lupus erythematosus, and spondylitis ancylopoetica were examined, along with healthy controls, for C3d plasma levels, circulating immune complexes, C3 serum levels, and CRP. Immune complexes were determined using a C1q binding assay, a 2.75% PEG precipitation technique, including the analysis of IgG and C3, and a new laser nephelometric latex test. C3d plasma levels were significantly (P〈1%) elevated in all groups of patients as compared to controls. With regard to the demonstration of circulating immune complexes, the PEG precipitation method discriminated best between patients and the control population. It was not possible to differentiate between the different disease entities with neither C3d serum levels or immune complexes. Concerning the assessment of disease activity, none of the evaluated parameters alone appears to be of clinical relevance. The individual application of more than one immune complex assay in combination with the measurement of C3d serum levels must be recommended if disease activity is to be assessed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00541327
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    Paper (German National Licenses)
    Fulltext
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