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  • 11
    ISSN: 1432-1440
    Keywords: Deoxycoformycin ; Hairy cell leukemia ; Refractory treatment
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary Three patients with advanced hairy cell leukemia received low-dose deoxycoformycin treatment after failure to respond to therapy with interferon alpha. Patients 1 and 2 had progressive disease after splenectomy and subsequent treatment with recombinant interferon alpha (for 7 and 3 months, respectively). DCF was administered at 4 mg/m2 weekly for 3 weeks, and then once every week for 6 weeks. Patient 1 was in complete remission after 9 weeks of treatment and patient 2 in partial remission with normalization of peripheral blood counts. The third patient, also splenectomized, developed hepatotoxicity after therapy trial with interferon for 24 days and no objective improvement was observed at this stage. She subsequently responded to DCF treatment with improvements in blood counts and bone marrow. This report demonstrates that DCF is highly effective in hairy cell leukemia and non-cross-resistant with interferon alpha.
    Type of Medium: Electronic Resource
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  • 12
    Electronic Resource
    Electronic Resource
    Springer
    Journal of molecular medicine 43 (1965), S. 52-53 
    ISSN: 1432-1440
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Type of Medium: Electronic Resource
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  • 13
    Electronic Resource
    Electronic Resource
    Springer
    Journal of molecular medicine 45 (1967), S. 679-681 
    ISSN: 1432-1440
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Summary 1. An anti-rabbit-bone-marrow-serum was obtained by sensitization of guinea pigs. This serum was injected into rabbits (1 ml/kg per week from 2 weeks to 5 months). A fibrosis and sclerosis of the bone marrow as well as a myeloid metaplasia of the spleen was seen already after one month. 2. The histological picture of these reactions is similar to some cases of human osteomyelofibrosis. 3. The histological pattern suggests an immunological reaction as an important factor in the origin of the experimental marrow fibrosis.
    Notes: Zusammenfassung 1. Durch die mehrmonatige Injektion von Kaninchenknochenmark-Antiserum, gewonnen durch Immunisierung von Meerschweinchen, ist es möglich, Knochenmarkfibrosen und -sklerosen zu erzeugen. 2. Dieses tierexperimentelle Modell ähnelt morphologisch manchen Myelofibrosen des Menschen. 3. Die Art der morphologischen Veränderungen weist auf immunologische Vorgänge als wesentliche ätiologische Faktoren hin.
    Type of Medium: Electronic Resource
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  • 14
    Electronic Resource
    Electronic Resource
    Springer
    Journal of molecular medicine 53 (1975), S. 397-399 
    ISSN: 1432-1440
    Keywords: Macrophage migration inhibitory factor (MIF) ; macrophage migration inhibition test ; MEM-test ; cell mediated immunity ; tumour immunity ; Makrophagenmigrations-Inhibitions-Faktor (MIF) ; Makrophagenmigrationshemm-Test ; MEM-Test ; zellvermittelte Immunität ; Tumorimmunologie
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Zusammenfassung Ein direkter Makrophagenmigrationshemm-Test mit heterologen Zellen (DMMTH) wird in einer Agarose-Tropfentechnik ausgeführt. Eine Suspension aus Peritonealmakrophagen des Meerschweinchens und Humanlymphozyten wird in 0,2%iger Agarose aufgeschwemmt, die mit einer automatischen Dosiervorrichtung tropfenförmig auf Platten für den Leukozytenwanderungstest aufgetragen wird. Die aus den erstarrten Tropfen erfolgende Auswanderung der Makrophagen kann planimetrisch gemessen werden. Die Streubreite der Zellkulturen beträgt im Mittel 8,6%. Eine signifikante Wanderungshemmung durch die Freisetzung des Migrations-Inhibitions-Faktors wird beobachtet, wenn sensibilisierte Humanlymphozyten mit dem in die Agaroselösung eingebrachten spezifischen Antigen reagieren. An Mantoux-positiven Probanden wurde die Sensitivität des Testes gezeigt.
    Notes: Summary A macrophage migration inhibition test using heterologous cells (DMMTH) is performed in an agarose-droplet technique. A suspension consisting of peritoneal exsudate cells from Guinea pig and human lymphocytes, mixed with 0,2 percent agarose is dispensed in droplets with a dispenser into culture chambers used for the leukocyte migration inhibition test. Macrophages migrate out of the gelified droplets. Migration areas can be measured by planimetry. Migration areas are exact to 8.6 percent. A significant migration inhibition, caused by migration inhibitory factors is observed after the reaction of the specific antigen with sensitized lymphocytes in the agarose droplet. The sensitivity of the test has been demonstrated in Mantoux positive persons.
    Type of Medium: Electronic Resource
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  • 15
    Electronic Resource
    Electronic Resource
    Springer
    Journal of molecular medicine 60 (1982), S. 451-455 
    ISSN: 1432-1440
    Keywords: Immunocytochemical method ; Peroxidase-antiperoxidase technique ; TdT ; Immunzytochemische Methode ; Peroxidase-Antiperoxidase Technik ; TdT
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Zusammenfassung Das Enzym „terminale Desoxynucleotidyltransferase“ (TdT) stellt einen wichtigen Marker für die Klassifizierung der Leukämien dar. Ursprünglich wurde dieses Enzym durch einen biochemischen Assay bestimmt. Durch die Entwicklung eines spezifischen Anti-TdT Antikörpers kann das Enzym durch Immunfluoreszenz-Technik nachgewiesen werden. Wir haben diese Methode weiter entwikkelt und die Peroxidase-Antiperoxidase (PAP)-Technik angewandt und optimiert. Bei Patienten mit akuten Leukämien ergab unser Vergleich der Ergebnisse der Bestimmung mit 3 Methoden (biochemisch, immunfluoreszenzoptisch und immunzytochemisch) eine ausgezeichnete Korrelation. Die PAP-Technik bietet außerdem weitere Vorteile: Die Untersuchung auf TdT kann auf Blut- oder Knochenmarkausstrichen mit dem Lichtmikroskop erfolgen. Die Präparate können für Dokumentationszwecke aufbewahrt werden. Gegenfärbungen sind auf demselben Präparat möglich. Mithin eignet sich die PAP-Methode zum TdT-Nachweis für die Routine-Diagnostik der Leukämien.
    Notes: Summary Terminal deoxynucleotidyl transferase (TdT) has become an important marker for the classification of acute leukemias. Originally detected by a biochemical assay, the presence of this enzyme in leukemia can now be detected by making use of a highly specific antibody and by applying the immunofluorescence method. In this study, an attempt was made to apply the unlabeled peroxidase-antiperoxidase (PAP) technique for the examination of TdT positive cells. We have optimized this method and have compared the different assays — biochemical, immunofluorescence, and immunocytochemical (PAP) — in ten patients with acute leukemia. The results obtained from all three methods are in accordance with one another, but the PAP method is a further simplification for the detection of TdT in the routine diagnostic of acute leukemias.
    Type of Medium: Electronic Resource
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  • 16
    ISSN: 1432-1440
    Keywords: Hyperthyroidism ; Erythrocytes ; Na-K ATPase ; Na-Li countertransport ; Intracellular sodium concentration
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary To investigate the effect of thyroid hormones on erythrocyte cation transport systems and intracellular electrolyte content we have measured the activity of Na-K ATPase, Na-Li countertransport, as well as red cell sodium and potassium contents in patients with hyperthyroidism and in euthyroid controls. Intracellular Na- and K-concentrations were determined in erythrocytes washed three times in isotonic MgCl2 solution. Ouabain-sensitive Na-transport was estimated as the increase of Na before and after addition of ouabain in an erythrocyte suspension in isotonic Na-free medium. Na-Li countertransport was measured according to the method described by Canessa et al. [2]. The patients with hyperthyroidism exhibited a significantly elevated intracellular sodium content as well as a highly increased Na-K ATPase activity. Intracellular potassium content was not altered in the hyperthyroid subjects, but Na-Li countertransport was markedly decreased as compared to the controls. The results indicate that different ion transport systems of the erythrocyte membrane are influenced by thyroid hormones. We suggest that the elevation of Na-K ATPase activity might be due to the increased intracellular sodium concentration which is caused by the diminished countertransport pathway. Furthermore, the activity of Na-K ATPase, Na-Li countertransport, and intracellular sodium content in erythrocytes might be a useful peripheral indicator of thyroid hormone excess.
    Type of Medium: Electronic Resource
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  • 17
    Electronic Resource
    Electronic Resource
    Springer
    Journal of molecular medicine 41 (1963), S. 339-339 
    ISSN: 1432-1440
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Type of Medium: Electronic Resource
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  • 18
    ISSN: 1432-1440
    Keywords: Muskeldystrophie vom Duchenne-Typ ; Membrandefekt ; Capping ; Konduktorinnen ; Duchenne muscular dystrophy ; Membrane defect ; Capping ; Carrier detection
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Summary Recent results showed that Duchenne muscular dystrophy is probably associated with a generalized membrane defect. The capping phenomenon in lymphocytes indicates normal intramembrane protein mobility and disturbances of this phenomenon are is believed to reflect membrane alterations. We have investigated capping in lymphocytes from 19 patients with Duchenne muscular dystrophy, 13 carriers, 8 patients' sisters, 14 patients' aunts and 52 normal controls. All 19 patients showed a reduction in capping both with fluorescein conjugated polyvalent goat antiserum (mean±SD=18.5±5.2%) and with fluorescein labeled Concanavalin A (mean±SD=10.8±3.2%) as compared to controls. Normal persons (n=52) have a mean of 50.2±9.9% (SD) capping with polyvalent anti-immunoglobulin (range: 32–72.5%) and 25.6±3.6% with F-Con A (range: 18.5–31.5%). 12 of the 13 mothers, as well as 5 of the 8 patients' sisters, also exhibited decreased lymphocyte capping to the same extent as the patients. Creatine kinase activity (CK) was elevated only in 4 mothers and 2 of the sisters. Our results indicate that this method might be of value in detecting carriers and can yield less false negative results as the CK-activity test.
    Notes: Zusammenfassung Es liegen Hinweise dafür vor, daß der progressiven Muskeldystrophie vom Duchenne-Typ (DMD) ein generalisierter Membrandefekt zugrunde liegt. Eine Möglichkeit zum Nachweis einer gestörten Membranfunktion stellt die Untersuchung des Capping-Phänomens von Lymphozyten dar. Es handelt sich dabei um eine fluoreszenzmikroskopisch erfaßbare Umverteilung der Oberflächen-Rezeptoren nach Antigenkontakt. Wir haben das Capping-Phänomen bei 19 Patienten und Angehörigen von 13 Familien mit DMD untersucht und dabei folgende Ergebnisse gewonnen: Lymphozyten von Kontrollpersonen zeigten mit Fluorescein markiertem Antiserum gegen Immunglobuline mit 50,2±9,9% (Mittelwert±SD) ein positives Capping-Phänomen und mit Fluorescein markiertem Concanavalin A (F-Con A) 25,6±3,6% (Mittelwert±SD). Demgegenüber war bei Patienten mit DMD, bei denen stark erhöhte Kreatin-Phosphokinase Werte (CK) gefunden wurden, das Capping-Phänomen mit Antiserum auf durchschnittlich 18,5±5,2% (Mittelwert±SD) vermindert und mit F-Con A auf 10,8±3,2% (Mittelwert±SD). Bei 12 der 13 Mütter, sowie bei 5 der 8 Schwestern der Patienten wurde ein vermindertes Capping in demselben Ausmaß wie bei den Patienten nachgewiesen. CK-Aktivität war jedoch nur bei 4 Mütter und 2 Schwestern pathologisch erhöht. Unser Ergebnis unterstützt die Hypothese, daß die Muskeldystrophie vom Duchenne-Typ mit einem generalisierten Membrandefekt einhergeht. Dieser Defekt läßt sich mittels Capping außerdem auch bei sonst “stummen” Konduktorinnen nachweisen. Diese Methode könnte sich bei der genetischen Beratung als wertvoll erweisen, da sie nach den bisherigen Ergebnissen weniger falsch negative Resultate liefert, als die alleinige Bestimmung der CK-Aktivität im Serum.
    Type of Medium: Electronic Resource
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  • 19
    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: Cord blood lymphocytes (CBL) have been shown to be functionally immature compared with normal circulating adult lymphocytes (NAL). Differentiation of T cells is associated with changes in surface antigenic markers and in the pattern of purine degradative enzymes. Previous studies have demonstrated that thymosin fraction 5 (TMS-F5) and thymosin alphal (TMS-α1 can induce in vitro differentiation of murine T-cell precursors and human thymocytes. We have investigated the effects of TMS-F5 and TMS-a, on the pattern of the purine degradative enzymes adenosine deaminase, purine nucleoside phosphorylase, and ecto-5′-nucleotidase (5′NT) of CBL and on the phenotypic markers from the OKT series 3,4,8 and 11. Other than a significantly reduced level of 5′NT activity (P〈0.001) and an elevated percentage of OKT4+cells (P〈0.01), CBL demonstrated the same immunological and biochemical patterns as NAL. Incubation of CBL with TMS-F5 (150 jug/ml) and TMS-α1 (1 μ/ml) for 40 h caused a significant rise in 5′NT level and decrease of cells positive for OKT4, resulting in a pattern characteristic of NAL. Thus TMS-F5 might induce the terminal differentiation of CBL, and TMS-α1 seemed to be the active component.
    Type of Medium: Electronic Resource
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  • 20
    Electronic Resource
    Electronic Resource
    Springer
    Journal of cancer research and clinical oncology 66 (1964), S. 379-388 
    ISSN: 1432-1335
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Summary Two groups of about 100 Wistar rats each received a total X-irradiation of 270 r. The animals of one group were bled (2 ml) two days before irradiation. A third group remained untreated. In the irradiated groups there was a significant increase of malignant tumors. Benign tumors were greatly increased in female animals in both irradiated groups because of the very frequent involvement of the uterus and breast. The benign tumors in males without blood-loss were no more numerous than in those of the control group. They were significantly increased, however, in the animals that had been bled. In respects to a two stagemechanism, this effect of the blood-loss suggests the action of self promoters of the body.
    Notes: Zusammenfassung 2 Kollektive Wistar-Ratten zu je etwa 100 Tieren erhielten eine Röntgenganzbestrahlung von 270 r, die Tiere einer Gruppe hatten 2 Tage zuvor einen Aderlaß von 2 cm2 erlitten; eine dritte Gruppe blieb unbehandelt. In den bestrahlten Kollektiven wurde eine signifikante Zunahme maligner Tumoren festgestellt. Benigne Neoplasmen waren bei Weibchen in beiden bestrahlten Serien aufgrund sehr häufigen Befalls von Uterus und Mamma stark vermehrt. Sie traten an Männchen ohne Aderlaß nicht zahlreicher, nach Blutverlust jedoch signifikant häufiger auf als im Kontrollkollektiv. Dieser Effekt des Blutverlustes ließe sich in Anwendung der “Zwei-Stufen-Theorie” als Wirkung körpereigener “Promotoren” deuten.
    Type of Medium: Electronic Resource
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