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  • 1
    ISSN: 1365-3083
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: Adherence of human lymphocytes to allogeneic tumour cell monolayers was found to depend on the presence of monocytes. Adherent lymphocytes could lie separated from tumour cells by treatment with lidocaine followed by nylon wool passage. Tumour-adherent cells (70% E-RFC, 45% Fcγ-R, 23% Fcμ-R, 5% monocytes) exhibited enriched natural killer (NK) activity not only against the tumour cell line used for isolation but also against seven other targets. When T cells were isolated subsequently as E-rosettes by density gradient centrifugation through Percoll, the enrichment in cytotoxicity was even more pronounced. Tumour-adherent T cells were severalfold enriched in both N K and antibody-dependent cell-mediated cytotoxicity (ADCC) activity. However, this enrichment was not paralleled by a concomitant increase in the number of Tγ cells (tumour-adherent T cells: 17% Tγ, 40% Tμ: tumour-nonadherent T cells: 12% Tγ, 60% Tμ). Marked differences could be observed by staining with a monoclonal antibody that was raised against human leukaemic Tγ cells of high NK and ADCC activity. This antibody (T8–11) stained 60% of tumour-adherent T cells. 20% of nonadherent T cells and 29% of T-cell controls. These results indicate that the spontaneous cyloloxic activity of human T cells resides within a small population, most of which are characterized by a specific surface antigen but not by conventional Fcγ receptors.
    Type of Medium: Electronic Resource
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  • 2
    ISSN: 1432-1440
    Keywords: Tγ lymphocytes ; Monocytic antigens ; Natural cytotoxicity ; Antibody-dependent cellular cytotoxicity ; Tγ-Lymphozyten ; monozytäre Antigene ; spontane Zytotoxizität ; antikörper-abhängige zellvermittelte Zytotoxizität
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Zusammenfassung Zwei Patienten, bei denen wir eine Proliferation von Tγ Lymphozyten nachweisen konnten, boten ein ungewöhnliches klinisches Bild (disseminierte intravasale Gerinnung im Anschluß an eine niedrigdosierte Milzbestrahlung, isolierte absolute Neutropenie). Während bei einem Patienten ohne Zweifel eine maligne Erkrankung vorlag, ist bei dem anderen Patienten eher eine reaktive Zellproliferation anzunehmen. Neben T-Zell-Oberflächeneigenschaften wiesen die proliferierenden Zellen ein monozytäres Antigen auf. Sie zeigten keine Suppression der Differenzierung von B-Lymphozyten in Plasmazellen. Im Gegensatz dazu entwickelten die proliferierenden Zellen, besonders bei einem Patienten, deutlich spontane und antikörpervermittelte Zytotoxizität mit Melanom-und MOLT 4-Zielzellen. Bei dem zweiten Patienten konnten wir phagozytäre Eigenschaften der Tγ-Zellen nachweisen. Die Ergebnisse lassen vermuten, daß Untereinheiten der Tγ-Zellen Beziehungen zu monozytären Zellen aufweisen und daß diese Zellen sowohl spontane als auch antikörpervermittelte Zytotoxizität und teilweise phagozytäre Eigenschaften entwickeln können.
    Notes: Summary Two patients suffering from proliferation of Tγ cells exhibited uncommon clinical features, such as activation of intravascular coagulation after low dose irradiation of the enlarged spleen in one patient and isolated neutropenia in the other patient. While the malignant nature of the disease was doubtless in one patient, cell proliferation in the other patient was more likely reactive. In addition to T cell determinants the proliferating cells expressed a monocytic antigen. They did not suppress B-lymphocyte differentiation into plasma cells. In contrast the proliferating cells, especially in one patient, acted as potent effectors in NK and ADCC using melanoma and MOLT 4 target cells. Erythrophagocytosis by Tγ cells was seen in one patient. The data suggest that subsets of Tγ cells are related to the monocytic lineage and that these cells can mediate both NKA and ADCC and partly can develop phagocytic activity.
    Type of Medium: Electronic Resource
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  • 3
    ISSN: 1432-069X
    Keywords: T-lymphocyte subsets ; Monoclonal antibodies ; Psoriasis vulgaris
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary Cryostat tissue sections from skin lesions of 16 patients suffering from chronic stationary psoriasis vulgaris were assayed for the presence of distinct T-cell subpopulations with monoclonal antibodies. Using two pan-T surface markers (M-T 4–11 and Lyt 3) the total number of infiltrating T-cells was measured. This cell population was further dissected into Leu 3a (helper/inducer) and M-T 8–11 (cytotoxic/suppressor) positive subsets. Percentages of T-cell subpopulations were within the ranges found in healthy peripheral blood and were thus regarded as normal.
    Type of Medium: Electronic Resource
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  • 4
    Electronic Resource
    Electronic Resource
    Springer
    Annals of hematology 48 (1984), S. 254-254 
    ISSN: 1432-0584
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Type of Medium: Electronic Resource
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  • 5
    Electronic Resource
    Electronic Resource
    Springer
    Annals of hematology 15 (1967), S. 198-201 
    ISSN: 1432-0584
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Summary Lysosomes were prepared according toCohn andHirsch from peritoneal exudate cells of rabbits. In the isolated subcellular fraction, lysosomes were characterized biochemically, histochemically, and by polarisation microscopy. They show positive polarisation crosses in unstained air-fixed preparations and appear in a reddish-yellow colour of birefringence after supravital staining with toluidine-blue. From the presented data it is concluded, that these lysosomes consist of superimposed spherical glycolipoprotein membranes or respectively of glycoprotein membranes with orderly interposed lipidmolecules.
    Notes: Zusammenfassung Lysosomen aus peritonealen Leukozyten von Kaninchen wurden nachCobn undHirsch isoliert und biochemisch, histochemisch und im Polarisationsmikroskop untersucht. Die Partikel zeigen in ungefärbten, luftgetrockneten Präparaten ein positives Polarisationskreuz und eine gelbrötliche Polarisationsfarbe nach Toluidinblau-Färbung. Aus diesen Beobachtungen wird geschlossen, daß diese Lysosomen aus übereinandergelagerten Glykolipoproteinmembranen aufgebaut sind, oder aber aus Glykoproteinmembranen zwischen denen Lipide eingelagert sind.
    Type of Medium: Electronic Resource
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  • 6
    ISSN: 1432-0584
    Keywords: Interferon ; Non-Hodgkin lymphoma
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary Preliminary results of a cooperative pilot study on the effect of fibroblast interferon in 10 patients with NHL of low-grade malignancy are presented. In eight patients lymphoma progression forced a discontinuation of therapy. At the end of interferon treatment one patient with CBCC showed a stable disease, one patient with CBCC a minor partial remission.
    Type of Medium: Electronic Resource
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  • 7
    Electronic Resource
    Electronic Resource
    Springer
    Annals of hematology 41 (1980), S. 399-402 
    ISSN: 1432-0584
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Type of Medium: Electronic Resource
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  • 8
    Electronic Resource
    Electronic Resource
    Springer
    Journal of molecular medicine 46 (1968), S. 44-46 
    ISSN: 1432-1440
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Summary Anti-mouse-thymus globulin (AMT-IgG) prepared from rabbit serum by fractional precipitation with (NH4)2SO4 and diaminoacridin abrogates completely second set reactions against allogeneic skin grafts when injected into A/NMRI mice. Pepsin-digestion of this active globulin yields bivalent antibody fragments (F (ab′)2), which still agglutinate thymocytes in vitro but are no longer effective in prolonging survival of primary allogeneic skin grafts. It is concluded that the immunosuppressive activity of the herologous antilymphocytic globulin is conveyed by theF c fragment. The specific mechanism by which AMT-IgG acts may be complement-dependent, e.g. cytotoxic, or may be induced by cytophilic properties of the antibodies. Injections ofF (ab′) 2 fragments do not produce peripheral lymphopenia.
    Notes: Zusammenfassung Anti-Maus-Thymus-Globulin (AMT-IgG) vom Kaninchen, präparativ durch fraktionierte Fällung mit (NH4)2SO4 und Diaminoacridin hergestellt, unterdrückt die Abstoßung von zweiten allogeneischen Hauttransplantaten (C57/B1/6 auf A/NMRI) in sensibilisierten Mäusen vollständig. Die Verdauung des aktiven IgG-Globulins mit Pepsin ergibt ein bivalentes agglutinierendes Antikörperfragment (F (ab′(2), das keine immunsuppressive Aktivität mehr in vivo besitzt. Die Überlebenszeit primärer Hauttransplantate von C57/B1/6 auf A/NMRI wird durch Injektionen vonF (ab′) 2-Fragmenten des AMT-IgG nicht verlängert. Die mitF (ab′)2 behandelten Mäuse zeigen keine Lymphopenie. Es wird daraus geschlossen, daß ein integresF c -Fragment für die immunsuppressive Wirkung der heterologen Antilymphocyten-Globuline notwendig ist. Die Frage, ob der spezifische Reaktionsmechanismus komplementabhängig ist oder durch die cytophile Aktivität desF c -Fragments bewirkt wird, bleibt offen.
    Type of Medium: Electronic Resource
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  • 9
    Electronic Resource
    Electronic Resource
    Springer
    Fresenius' Zeitschrift für analytische Chemie 311 (1982), S. 347-347 
    ISSN: 1618-2650
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
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