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  • 1
    Digitale Medien
    Digitale Medien
    Oxford, UK : Blackwell Publishing Ltd
    Scandinavian journal of immunology 11 (1980), S. 0 
    ISSN: 1365-3083
    Quelle: Blackwell Publishing Journal Backfiles 1879-2005
    Thema: Medizin
    Notizen: Acid phosphatase and esterase cytochemistry performed on purified normal human T-cell populations showed that both methods produced distinctive localized dot patterns of reactivity in 60–70% of cells. By examination of rosette preparations formed with ox erythrocytes coated with IgM (EAM), with IgG (EAG), or anti-human κ and λ light chains, it was shown that this pattern of reactivity was largely restricted to small T lymphocytes possessing receptors for the Fc of IgG (Tμ cells). In addition, both B lymphocytes and T cells with receptors for the Fc of IgG (Tλ cells) were larger lymphocytes with more abundant cytoplasm and usually displayed scattered granular acid phosphatase activity; in esterase preparations both cell types were either negative or possessed similar scattered granular positivity. As compared with Tμ cells, Tγ cells were seen to form loose spontaneous rosettes with sheep erythrocytes. Combined esterase and acid phosphatase staining showed that both enzyme activities in the Tμ. cells are localized in the same area, and ultrastructural acid phosphatase cytochemistry established that this was in distinctive lysosomal structures. Tμ staining by both esterase and acid phosphatase cytochemistry was greatly reduced after rosetting with EAG, but not after rosette formation with EAM or sheep erythrocytes.
    Materialart: Digitale Medien
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  • 2
    ISSN: 1432-1440
    Schlagwort(e): Hairy cell leukemia ; Lymphoblastoid type ; IFNα ; Surface marker
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Medizin
    Beschreibung / Inhaltsverzeichnis: Summary More than 50 patients with hairy-cell leukaemia have now been entered into the British Wellferon (IFN) study, at different centres under the coordination of the Wellcome Research Laboratories. While the treatment duration and dosage varied between patients, the initial dose was usually 3 megaunits daily by intramuscular or subcutaneous injection. Although flu-like symptoms and mild somnolence were commonly experienced side-effects, cessation of IFN treatment as a result of such effects was necessary in only three patients. All patients irrespective of previous treatment showed some response and a complete (〈 5% hairy cells, HCs) bone marrow response was observed in 17. The degree of response was related to the duration of therapy. Immunological markers showed that there was no apparent increase in natural killer (NK) cells and no return of normal B lymphocytes. Light-chain-restricted B cells became reduced in parallel with the disappearance of morphological HCs. Absolute numbers of T cells were reduced, Leu2a+ preferentially, resulting in an increase in helper/suppressor ratios. The ratios (saturation index, SI) of saturated to unsaturated 18 carbon fatty acids (C18FA) of erythrocyte or leukocyte membranes, while abnormal in untreated patients, approached normal levels during IFN therapy. It is concluded that prolonged αIFN therapy is highly effective in HCL. The mechanism of action of IFN remains unknown, but indirect surface-marker data favours a direct effect on HCs.
    Notizen: Zusammenfassung Über 50 Patienten mit gesicherter Diagnose einer Haarzelleukämie wurden in eine multizentrische Studie aufgenommen, die von den Wellcome Research Labaratories koordiniert wurde. Die Patienten erhielten initial 3 Mio i.E. IFN-α (lymphoblastoides IFN-α) subcutan oder intramuskulär. Nach Erreichen einer Remission wurden Behandlungsdauer und IFN-Dosis in verschiedenen Patienten variiert. Grippeähnliche Symptome und Apathie waren häufige Nebenwirkungen der Behandlung, die jedoch in nur 3 Fällen zum Absetzen der Therapie zwangen. Alle Patienten besserten sicher unter IFN-α. In 17 Patienten wurde eine komplette Remission, mit weniger als 3% Haarzellen im Knochenmark) beobachtet. Das Ausmaß der Remissionen (minimal, partiell, komplett) korrelierte mit der Behandlungsdauer. Analysen der Oberflächenmuster der aus den Patienten gewonnenen peripheren Blutlymphozyten zeigten während der Therapie einen Anstieg weder der NK-Zellen noch der normalen B-Lymphozyten. Die Zahl der Lichtketten-positiven B-Zellen nahm parallel mit der Reduktion der morphologisch identifizierten Haarzellen ab. Die absolute Zahl der CD-8 positiven T-Zellen sank, in geringerem Ausmaß auch die Zahl der CD-4 positiven Zellen. Dies führte zu einem Anstieg der Ratio der Helfer/Suppressor-Zellen. Das Verhältnis gesättigter gegenüber ungesättigter Fettsäuren (C18F9) in Erythrozyten- und Leukozytenmembranen — vor Therapie abnormal niedrig — normalisierte sich unter Behandlung. Die Daten zeigen, daß eine langandauernde IFN-α Behandlung bei der Haarzelleukämie hochwirksam ist. Der Wirkungsmechanismus von IFN in dieser Erkrankung ist nicht geklärt, die Ergebnisse der Oberflächenmarkeranalysen lassen jedoch einen direkten Effekt des IFNes auf die Haarzellen vermuten.
    Materialart: Digitale Medien
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  • 3
    Digitale Medien
    Digitale Medien
    [s.l.] : Nature Publishing Group
    Nature 268 (1977), S. 243-245 
    ISSN: 1476-4687
    Quelle: Nature Archives 1869 - 2009
    Thema: Biologie , Chemie und Pharmazie , Medizin , Allgemeine Naturwissenschaft , Physik
    Notizen: [Auszug] In Table 1, data are presented on the surface marker characteristics of the unusual hairy cells (HCs) from peripheral blood and spleen when -tested over a period of two months. Although the expression of these individual B and T phenotypic markers fluctuated over this time, a significant overlap ...
    Materialart: Digitale Medien
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  • 4
    ISSN: 1432-0843
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Medizin
    Notizen: Summary Seventeen patients with advanced lymphoma were treated with high-dose chemotherapy with autologous bone marrow rescue. In 11 patients with non-Hodgkin's lymphoma (NHL) there were 2 complete remissions (CRs) and 2 partial remissions (PRs), and in 6 patients with Hodgkin's disease there were 5 CRs. Three patients remain well in unmaintained remission (days 874, 446 and 351), and a further 2 are alive and still receiving treatment (days 650 and 558). This type of therapy appears useful and should now be considered earlier in the course of the disease.
    Materialart: Digitale Medien
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  • 5
    ISSN: 1573-8280
    Schlagwort(e): interleukin-2 (IL2) ; lymphatic administration ; lymphocyte cytotoxicity ; lymphoma ; melanoma
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Medizin
    Notizen: Abstract During this phase I/II study, enodolymphatic cannulae were placed in the iliac lymphatics under general anaesthesia. IL2 was then infused via this route at escalating doses until the highest tolerated dose was achieved; then, continuous infusion was maintained for 2 to 3 weeks. Seven patients with advanced cancer (3 lymphoma, 4 melanoma), resistant to all other modalities of treatment received such therapy. Most patients tolerated 4 to 5 × 106 u/day of IL2 for 2 to 3 weeks with less toxicity as compared to the equivalent dosage given intravenously. No severe perioperative morbidity was experienced. One melanoma patient had a minor clinical response. Changes in circulating lymphocyte numbers and cytotoxicity demonstrated a systemic effect of endolymphatic IL2 therapy. Conclusions: The endolymphatic administration of IL2 is associated with less toxicity than the intravenous route but still achieves a systemic effect; a lower tumour burden may prove more responsive to this therapy.
    Materialart: Digitale Medien
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