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  • 1
    Electronic Resource
    Electronic Resource
    Oxford, UK : Blackwell Publishing Ltd
    Scandinavian journal of immunology 21 (1985), S. 0 
    ISSN: 1365-3083
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: We have extended our previous siudy of induction of T-lymphocyte immunocompetence in athymic nude rats by cultured epithelium (CTE) of syngencic urigin to that by CTE of allogeneic origin. Immune responsiveness (IgG-class antibody und delayed-type hypersensi-liviiy) after ovalbumin immunization is detectable by -1–6 weeks after transplantation. However, the antibody appears at a slower rate when compared with heterozygous immunocompeient littermates. Seven weeks after transplantation phytohaemagglutinm responsiveness of spleen cells is detectable, and in‘Independent areas of lymphoid organs lymphocytes with helper and non-helper T-cell phcnotype are presenl, bul at lower levels than those in heterozygous immunocompetenl littermates. Levels comparable to that of immunocompeient rals are reached about 20 weeks after transplantation. Since CTE contains thymocytes. control experiments consisted of transplantation with high numbers of allogeneic freshly isolated thymocytes in alhymic nude ratv These animals showed IgG-class antibody formation after ovalbumin immunization, but at lower levels than CTE-treated rats, and were almost negative in T-cell immunocompetence assessed in the other assays. We conclude that CTE of allogeneic origin induces T-eell immunocompetence in athymic nude rats to the level of heterozygous immunocompeteni littermates. This study adds to the rationale of CTE transplantation applied in treatment of thymic dysfunction.
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Oxford, UK : Blackwell Publishing Ltd
    Scandinavian journal of immunology 18 (1983), S. 0 
    ISSN: 1365-3083
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: The combination of centrifugal elutriation as an efficient and reproducible method to separate thymocytes by size, micromethods to assess purine interconversion enzymes, and assessment of purine (deoxy) nucleoside inhibition of mitogen responses enabled us to study purine metabolism at the intrathymic level. Out of six fractions, four (nos. 3–6), containing medium-and large-sized lymphocytes, showed a proliferative response after stimulation with phytohaemagglutinin (PHA). In fractions 1–6 the number of cells with an immature immunological phenotype gradually decreased, and cells with the phenotype of mature cells gradually increased. The enzyme activity ratio of adenosine deaminase to purine nucleoside phosphorylase gradually decreased from 21 in fraction 1 to 7 in the last fraction (blood T-cell value, 0.7). We conclude that this enzyme activity ratio is a useful marker for intrathymic T-cell maturation stages. In PHA-responsive cell fractions (3–6), the sensitivity to inhibition of the PHA response by (deoxy) adenosine and deoxyguanosine was inversely related to the enzyme activity ratio of ecto-5′-nucleotidase to deoxycytidine kinase. These findings are compatible with the hypothesis that intracellular concentrations of phosphorylated (deoxy) nucleosides are related to this inhibition. We conclude that the differences in purine metabolism among the various (mitogen-responsive) human thymocyte fractions are related to lymphoid cell function. Since the number of cells contributing to the enzyme activities and the number of cells contributing to the proliferative response (about 15% of unseparated cells) differ considerably, it is not possible to evaluate enzyme activities in unseparated thymocytes in terms of relationships between purine metabolism and lymphocyte function.
    Type of Medium: Electronic Resource
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  • 3
    Electronic Resource
    Electronic Resource
    Oxford, UK : Blackwell Publishing Ltd
    British journal of dermatology 124 (1991), S. 0 
    ISSN: 1365-2133
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Type of Medium: Electronic Resource
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  • 4
    Electronic Resource
    Electronic Resource
    Oxford, UK : Blackwell Publishing Ltd
    Scandinavian journal of immunology 25 (1987), S. 0 
    ISSN: 1365-3083
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: Changes in the concentration and composition of serum immunoglobulin A (IgA) and deposits of IgA in tissues are well-known characteristics of alcoholic liver disease. We invesitigate whether these changes also accompany IgA synthesis by peripheral bloos mononuclear cells, (MNC), by counting immunoglobuliln-producing cells using a solid-phase enzymatic ‘spot’ test, and by analysis of immunoglobulin content in lysed cells with culture supernatant using conventional enzymatic methods. Patients with alcoholic liver disease exhibited a significantly higher number of spontaneously IgA-producing cells than did normal healthy controls (1.7 × 106 cells/1 blood and 0.5 × 106 cells/1 blood, respectivly, P〈0.01). The IgA content of MNC directly after isolation was also higher (38 and 13 ng/106 MNC, respectively, P〈0.01), as was the IgA production during an unstimulated 6-day culture period (520 and 95 ng/106 MNC put into culture, respectively, P〈0.001).The spontaneously IgA-producing cells assessed directly after isolation of mononuclear cells correlated with the IgA production during an unstimulated culture (P〈0.01). We conclude that in alcoholic liver disease, B Iymphocytes circulate which may have been activated in vivio.
    Type of Medium: Electronic Resource
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  • 5
    ISSN: 1437-160X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Type of Medium: Electronic Resource
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  • 6
    Electronic Resource
    Electronic Resource
    Springer
    Rheumatology international 11 (1991), S. 89-89 
    ISSN: 1437-160X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Type of Medium: Electronic Resource
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  • 7
    Electronic Resource
    Electronic Resource
    Springer
    Rheumatology international 11 (1991), S. 137-140 
    ISSN: 1437-160X
    Keywords: Lupus ; SLE ; Therapy ; Nephritis
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary The prognosis of systemic lupus erythematosus has improved markedly. This has been due to various factors: improved serological testing leading to better diagnosis, better understanding of secondary complications, and the possibility of treating these. How much has improved treatment of the primary disease process contributed to the improvement in prognosis? We have evaluated the clinical outcome of 56 patients with lupus nephritis proven by biopsy, followed at out hospital over the past 16 years. During this period various therapies were used during active periods of the disease, based on literature data or participation in trials. Prognostic risk factors for the development of end stage renal disease (ESRD) appeared to be: WHO-class IV histopathology of the renal biopsies, male sex and raised serum creatinine. Development of ESRD at 5 years was 13% and at 10 years was 30%. Overall survival was 95%. Based on data from well controlled trials performed at the National Institute of Health (US) and our observations the need for well conducted long-term prospective randomized trials is stressed again.
    Type of Medium: Electronic Resource
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  • 8
    Electronic Resource
    Electronic Resource
    Springer
    Virchows Archiv 403 (1984), S. 247-256 
    ISSN: 1432-2307
    Keywords: Multinucleate giant cells ; Sjögren's syndromee ; Epimyoepithelial islands ; Sarcoidosis ; Immunoperoxidase technique ; Muramidase
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary The presence of multinucleate giant cells in the sublabial salivary gland tissue in Sjögren's syndrome is an unusual phenomenon which can give rise to differential diagnostic problems. We found in 4 cases of 55 patients with Sjögren's syndrome multinucleate giant cells. In 2 of these 4 patients epimyoepithelial islands were also present. The combination of both multinucleate giant cells as epimyoepithelial islands can mimic the histological picture of a non-caseating granulomatous disease. To discriminate between an epimyoepithelial island and an epithelioid granuloma the immunoperoxidase technique with antibodies directed against muramidase appeared an useful tool. The epithelioid cells contain muramidase whereas the cells in the epimyoepithelial island do not contain this enzyme. Thus, multinucleate giant cells are a rare phenomenon in Sjögren's syndrome, therefore restricting its diagnostic significance. When they occur in Sjögren's syndrome staining for muramidase can be of help to avoid a false positive diagnosis of diseases in which non-caseating granulomatous inflammation occur, such as in sarcoidosis.
    Type of Medium: Electronic Resource
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  • 9
    ISSN: 1432-069X
    Keywords: Lupus erythematosus ; Photosensitivity ; Antinuclear antibodies ; dsDNA ; Nonhistone nucleoproteins
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary Antibody binding on the cell surface of epidermal cells, recently established on cultured neonatal foreskin cells, is supposed to play a role in the pathogenesis of in vivo antinuclear antibodies (ANA) of the skin. To study this phenomenon in suspensions of adult human keratinocytes, a cell system more closely related to the in vivo situation, we investigated the binding capacity of nine sera with various antibody profiles against nuclear components, as well as a murine monoclonal Sm-antibody. It was found that sera containing antibodies against nonhistone nucleoproteins bound to the cell surface of keratinocytes, whereas monospecific anti-dsDNA sera and the murine anti-Sm serum did not. This binding was found in both basal and suprabasal keratinocytes. The percentage of cells showing antibody binding was not significantly enhanced by preirradiation with ultraviolet light, as was found in a previously study. The cell surface binding is probably an antigen-antibody binding and not the result of cross-reactivity. Such cell surface binding may be important for the formation of in vivo ANA in the skin.
    Type of Medium: Electronic Resource
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  • 10
    ISSN: 1432-0851
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary An indirect immunofluorescence assay is described which specifically detects antibodies against cervical carcinoma-associated membrane antigens. Cells from the ME-180 cervical carcinoma cell line were used as target cells. Sera had to be absorbed with pooled tonsillar lymphocytes prior to use, to remove nonspecific antibodies. The antibody was detected in 61 of 74 patients (82%) with invasive squamous cell carcinoma of the uterine cervix and in 5 of 65 controls (8%). A group of 49 patients with early or preneoplastic stages of this tumor (microinvasive carcinoma, carcinome-in-situ, and dysplasia) did not differ from the control group in the incidence of the antibody (5 of 49 patients, 10%). It is concluded that the occurrence of this antibody is specific for cervical carcinoma (P〈0.001). However, the assay cannot be used as a diagnostic marker for preneoplastic stages of this tumor.
    Type of Medium: Electronic Resource
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