Library

feed icon rss

Your email was sent successfully. Check your inbox.

An error occurred while sending the email. Please try again.

Proceed reservation?

Export
  • 1
    Electronic Resource
    Electronic Resource
    Oxford, UK : Blackwell Publishing Ltd
    Scandinavian journal of immunology 26 (1987), S. 0 
    ISSN: 1365-3083
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: Chronic inflammatory synovitis is characterized by both lymphocytic infiltrates and persistent polymorph exudates. Activated polymorphs release reactive oxygen species (ROS) during inflammation, but the contribution that these make to the lymphocyte abnormalities associated with RA has been little studied. We therefore investigated the cytotoxic effects of the reactive oxygen speices on human peripheral blood mononuclear cells (PBMC). PBMC were exposed to RPMI 1640 medium previously irradiated for up lo 60 min. Consistent dose-dependent killing was observed at 24 h. Antioxidant studies indicated that H2O2 was the effective species. Catalase, which specifically degrades H2O2, gave almost total protection against cell death, while superoxide dismutase (SOD), thiourea, and mannitol were largely ineffective. Addition of exogenous H2O2 caused an identical pattern of cell death to that observed with irradiated medium. PBMC cultures supplemented with desferrioxamine (a ferric iron chelator) also gave significant protection, suggesting that H2O2 mediated its effects via OH* radicals, Analysis of lymphocyte subpopulalions showed that ROS caused a selective depletion, depending on the level of H2O2 present. Low levels induced a speciftc loss of CD8+ cells, while higher concentrations caused significant loss of CD4+ T cells as well. slg+ B cells were unaffected at either concentration. This selective lymphotoxic effect of ROS may be of considerable importance in the pathogenesis of autoimmune inflammatory disease.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 2
    Electronic Resource
    Electronic Resource
    Springer
    Rheumatology international 10 (1990), S. 3-7 
    ISSN: 1437-160X
    Keywords: Etodolac ; Osteoarthritis ; Chondrocytes ; Collagen ; Proteoglycan
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary Some nonsteroidal anti-inflammatory drugs (NSAIDs) used in the treatment of osteoarthritis (OA) may damage articular cartilage. This damage may be caused by suppression of proteoglycan synthesis or by altered collagen synthesis in the presence of prostaglandin E2 (PGE2) induced by interleukin-1 (IL-1). The clinical and biochemical effects of etodolac, a new NSAID, on the symptoms of OA and on cartilage metabolism are reviewed. Clinically, etodolac (200–600 mg/day) was more effective than placebo, and as effective as aspirin (3200–4800 mg/day), piroxicam (20 mg/day), naproxen (1000 mg/day), and diclofenac (150 mg/day) in relieving the symptoms of OA. In in vitro studies, proteoglycan synthesis was not affected by the presence of etodolac when human chondrocytes were grown in a three-dimensional culture. Etodolac preserved collagen phenotype in human chondrocytes cultured in a monolayer in the presence of IL-1. In contrast, the collagen phenotype of cells cultured in the presence of indomethacin and IL-1 changed. Under those conditions, less type II and type IX collagen were synthesized and more type I and type III collagen were synthesized. These findings suggest that etodolac, an effective agent in the treatment of OA, has the potential advantage of not damaging articular cartilage in vivo.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 3
    Electronic Resource
    Electronic Resource
    Springer
    Rheumatology international 4 (1984), S. 13-17 
    ISSN: 1437-160X
    Keywords: Platelets ; Synovial fluid ; Inflammation
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary In a study of synovial fluid from 110 patients with various forms of arthritis, platelets were identified in the synovial fluid of all the 50 rheumatoids, in 18 out of the 25 (72%) with osteoarthritis and in all 35 of those with other forms of inflammatory osteoarthrosis. Identification of platelets by light microscopy was confirmed by electron microscopy. Platelet counts were significantly higher in rheumatoid fluid (mean 14 988/mm3; range 1000–65 000/mm3) compared with fluid from patients with osteoarthrosis (mean 1592/mm3; 0–10 000/mm3). In addition, significantly higher platelet counts were found in the synovial fluid (SF) of inflamed joints. There was a positive correlation between the SF platelet count and the total white cell count, polymorph count, hydrogen ion concentration, knee score, acid phosphatase and 5-nucleotidase activity and a negative correlation with the glucose level. All these factors indicate joint activity. Finally, platelet numbers correlated with SF levels of immunoglobulin M, and seropositive patients had significantly higher platelet counts in the SF compared with seronegative patients. Rheumatoid patients with thrombocytosis also had higher SF platelet counts. The close relationship of the SF platelet count to other indices of inflammation supports the concept that platelets may directly contribute to synovial inflammation by a variety of pathways.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 4
    Electronic Resource
    Electronic Resource
    Springer
    Rheumatology international 1 (1981), S. 39-41 
    ISSN: 1437-160X
    Keywords: Rheumatoid arthritis ; D-penicillamine ; Absorption ; Iron
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary A simple biochemical technique is described, which reflects the levels of D-penicillamine in the serum of patients with rheumatoid arthritis treated with this drug. The assay is based on the ability of D-penicillamine to stimulate the rate of reaction between serum sulphydryl groups and Ellman's reagent (DTNB). Using this technique, co-administration of oral ferrous sulphate has been shown to block D-penicillamine absorption. The assay provides useful information for the evaluation of a patient's clinical response to D-penicillamine treatment.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 5
    ISSN: 1437-160X
    Keywords: IgG rheumatoid factor ; IgG isotypes ; Rheumatoid arthritis
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary A new assay for IgGRF activity is described which employs human IgGFc as the antigen and a radiolabelled monoclonal antibody directed against human IgG (CHI domain) as the developing antibody. Using this assay IgGRF activity against human IgG isotypes was measured and most sera from RA patients were shown to react predominantly with IgG1 and IgG2 but few reacted with IgG3 and IgG4. The same sera were tested for IgMRF to the IgG isotypes. IgG2 was the best antigen, IgG1 and IgG4 were less so and reactivity with IgG3 was the lowest. IgGRF without associated IgMRF was obtained, its specificity compared to that of IgMRF, and found to be broadly similar. With the new assay high levels of serum IgGRF were found in those RA patients with extraarticular disease but not in RA patients with synovitis alone.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 6
    Electronic Resource
    Electronic Resource
    Springer
    Rheumatology international 3 (1983), S. 139-142 
    ISSN: 1437-160X
    Keywords: Rheumatoid arthritis ; Neutrophil ; Exocytosis ; Monocyte ; Oxidative metabolism ; Fc receptor
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary Polymorphonuclear leucocytes and monocytes have been isolated from the peripheral blood of patients with rheumatoid arthritis and healthy controls using Percoll gradient centrifugation. These cells have been tested for their ability to release superoxide anion and to undergo exocytosis following stimulation with heat-aggregated IgG. Monocytes from patients and controls react similarly in these assays but neutrophils from the patients release less β-glucuronidase than do normal cells. This could not be related either to the expression of cell surface Fc receptors or to oxidative metabolism and does not appear to be an effect of the administration of non-steroidal anti-inflammatory drug therapy. It is suggested that rheumatoid neutrophils are not inherently defective but are less responsive to activation in vitro because of prior exposure to immune complexes in vivo.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 7
    Electronic Resource
    Electronic Resource
    Springer
    Rheumatology international 5 (1985), S. 193-199 
    ISSN: 1437-160X
    Keywords: Rheumatoid arthritis ; Radiological assessments ; Anti-rheumatic drugs
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary Joint damage is a major problem in the long-term course of rheumatoid arthritis. It is usually assessed radiologically. In this review the methods of measuring the radiological changes are outlined, and the effects of anti-rheumatic drugs on radiological progression summarised. Two methods of scoring radiographs have become standard techniques; these are the Sharp index and the Larsen index. They both concentrate on cartilage loss and erosive damage in the hands and wrists. Investigations of the effects of drugs upon the radiological progression of rheumatoid arthritis include: indirect studies evaluating the inter-relationships between clinical, laboratory and radiological variables; placebo-controlled studies of slow-acting drugs and similarly controlled studies without a placebo group; open studies evaluating the long-term effects of treatment of slow-acting drugs. Only slow-acting drugs such as gold have been persistently considered to have a possible effect on reducing radiological progression. Unfortunately the therapeutic studies use a wide range of different radiological assessment techniques, and the incomparability is therefore difficult. None of the studies give a good indication that there is a marked reduction in joint damage by slow-acting drugs. On balance studies do suggest minor effects on the process of progression. Instead of debating how strong the evidence of such minor effect really is, it is concluded that rheumatologists should look towards novel therapeutic approaches to induce a major reduction in the rate of damage.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 8
    ISSN: 1437-160X
    Keywords: Rheumatoid arthritis ; Antinuclear antibodies
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary An investigation of the incidence of IgG and IgM antinuclear antibodies (ANA) in patients with connective tissue diseases showed that IgM ANA predominated in rheumatoid arthritis, whilst in systemic lupus erythematosus IgG antibodies were more common. Patients with other connective tissue diseases less frequently had antinuclear antibodies and there was little difference in the incidence of IgG and IgM antibodies. Cross reacting rheumatoid factors contributed to the IgM antinuclear activity of rheumatoid sera. IgM ANA was not related to disease activity in patients with rheumatoid arthritis. Immunoglobulin class differences of ANA in rheumatoid arthritis and systemic lupus erythematosus may reflect the differing pathological processes of these two diseases and may be of value in their differential diagnosis.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 9
    Electronic Resource
    Electronic Resource
    Springer
    Rheumatology international 5 (1985), S. 247-251 
    ISSN: 1437-160X
    Keywords: Sulphasalazine ; Synovial fluid ; Rheumatoid arthritis
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary A study was made of plasma and synovial fluid levels of sulphasalazine, one of its dissociation products — sulphapyridine and a metabolite of the latter — acetyl sulphapyridine in patients with rheumatoid arthritis (RA) who were in a steady state on sulphasalazine therapy. Combined sulphapyridine levels were significantly higher than those of sulphasalazine both in plasma and synovial fluid. Synovial fluid levels of both drugs correlated with their plasma levels and were generally slightly lower. Some patients accumulated sulphasalazine and sulphapyridine in the synovial fluid and the mean concentration of sulphasalazine was higher in the fluid than in the plasma. The explanation for this is uncertain. The concentration of combined sulphapyridine in synovial fluid was related to local joint inflammation and more active systemic disease. No consistent association was found between sulphasalazine levels and local or systemic activity. The higher sulphapyridine levels in synovial fluid found in this study suggest the possibility that this moiety could play a more active role in RA than it does in inflammatory bowel disease.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 10
    ISSN: 1432-2307
    Keywords: CD4+ T cells ; Primed helper T cells ; Naive helper T cells ; Salivary glands ; Sjogren's syndrome
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary This study has investigated the presence and distribution of B cells, T cells and T-cell subsets within labial glands of patients with primary Sjogren's syndrome (n=9) and secondary Sjogren's syndrome associated with rheumatoid arthritis (n=8) using a sequential double immunoperoxidase technique and true colour image analysis. The composition of the inflammatory infiltrates was similar in glands from both patient groups. B cells were normally present within large foci with few detected in diffuse infiltrates such that the ratio of T∶B cells in foci (2.4∶1) was significantly lower than in diffuse infiltrates (7.3∶1; P〈0.001). In all infiltrates helper T cells (CD8−, CD3+) predominated over suppressor/cytotoxic cells (CD8+, CD3+; 2.7∶1). Analysis of primed (CD45RA−, CD45RO+) and naive (CD45RA+, CD45RO−) CD8− T cells showed that the ratio of the primed to naive subset was significantly higher in focal (4.2∶1) compared to diffuse (1.5∶1;P〈 0.001) areas of lymphoid infiltration. These results indicate that the focal lymphocytic infiltrates characteristic of Sjogren's syndrome contain B cells associated with a T-cell population consisting predominantly of primed CD8− helper T cells. This latter population may be responsible for upregulating glandular B-cell activity in Sjogren's syndrome.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
Close ⊗
This website uses cookies and the analysis tool Matomo. More information can be found here...