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  • 11
    ISSN: 1432-1440
    Keywords: Surface markers ; Acute lymphoblastic leukemia ; Oberflächenmarker ; Lymphoblastenleukämien
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Zusammenfassung Bei 47 Patienten mit unreifzelliger lymphatischer Leukämie wurden die mononukleären Zellen des peripheren Blutes, in einigen Fällen auch lymphatische Zellen des Knochenmarkes, hinsichtlich ihrer Membranmarker untersucht. Folgende Marker wurden verwendet: die Rosettenbildung mit Schaferythrozyten, der Nachweis von Oberflächenimmunglobulinen, des Fc-Rezeptors sowie des Komplementrezeptors. Bei 6 der 23 unbehandelten Patienten bildete der Großteil der Blasten Spontanrosetten mit Schaferythrozyten (T-ALL), bei zwei dieser 6 Patienten waren am Großteil der Lymphoblasten auch Komplementrezeptoren nachweisbar. Bei einem weiteren Patienten waren an den Lymphoblasten sowohl Fc- als auch Komplementrezeptoren vorhanden. 16 der 23 Patienten waren Marker negativ (O-ALL). Wurden die beiden Gruppen — eine mit Markern, eine ohne Marker — hinsichtlich ihres klinischen Bildes und Verlaufes verglichen, so zeigte sich, daß die Marker positiven Leukämien fast durchwegs dem männlichen Geschlecht angehörten und häufig einen Mediastinaltumor entwickelten. Ferner lag die Remissionsrate in dieser Gruppe deutlich niedriger als in der Gruppe der Marker negativen Leukämien. Bei 24 Patienten in Remission, die durchwegs unter zytostatischer Erhaltungstherapie standen, waren sowohl die Rosetten-bildenden Lymphozyten als auch die Lymphozyten mit Oberflächenimmunglobulinen und Fc-Rezeptoren vermindert. Der Anteil an Rosetten-bildenden Lymphozyten korrelierte mit dem klinischen Verlauf insoferne, als bei Patienten mit schlechtem klinischen Verlauf diese Verminderung ausgeprägter war als bei Patienten mit günstigem Verlauf.
    Notes: Summary In 47 patients with acute lymphoblastic leukemia surface markers were evaluated on mononuclear cells of the peripheral blood as well as in some cases on bone marrow lymphocytes. The lymphocytes were characterized by their binding capacity for sheep red blood cells, the demonstration of Fc-receptors, complement receptors as well as surface immunoglobulins. In 6 of 23 untreated patients the blasts bound sheep red blood cells spontaneously (T-ALL), in two of these six cases the lymphoblasts had simultaneously receptors for complement. In a further patients the lymphoblasts had complement- and Fc-receptors. The blasts of 16 of 23 patients were negative in respect to the markers tested (O-ALL). By comparing two groups of patients—one with positive cells, one unreactive—the clinical features differed: the marker positive group showed a predominance of male patients, 5 of 7 patients had a massive mediastinal mass and the remission rate was lower than in the group with positive blasts. 24 patients in remission under maintance treatment had a decreased percentage of rosette forming lymphocytes as well as lymphocytes with surface immunoglobulins and Fc-receptors. There existed some correlation between the percentage of rosette forming lymphocytes and the clinical course: patients with complications had lower percentages of rosette forming lymphocytes than patients with a favourable course.
    Type of Medium: Electronic Resource
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  • 12
    Electronic Resource
    Electronic Resource
    Springer
    Journal of molecular medicine 48 (1970), S. 634-636 
    ISSN: 1432-1440
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Summary A test system for demonstrating complement receptors on human peripheral lymphocytes is described. Red cells coated with antibody and complement formed rosettes around 20% of blood lymphocytes, whereas in controls only very few rosettes were observed. The percentage of lymphocytes with rosettes was related to the amount of complement on the red cells. In contrast to monocytes the complement receptor on lymphocytes was not inhibited by EDTA, whereas trypsin treatment showed an adverse effect on the receptor of both cell types. In 9 of 10 patients with chronic lymphocytic leukaemia a significantly lower percentage of lymphocytes exhibiting receptor activity for complement was observed.
    Notes: Zusammenfassung Ein Testsystem zum Nachweis von Komplementreceptoren an menschlichen Lymphocyten wird beschireben. Bei Zusatz von Erythrocyten-Antikörper-Komplementkomplexen kam es um 20% (10–29%) von Blutlymphocyten zur Rosettenbildung, während in den entsprechenden Kontrollen solche Rosetten höchstens vereinzelt nachweisbar waren. Der Prozentsatz rosettenbildender Lymphocyten war von der Komplementkonzentration abhängig. Im Gegensatz zum Komplementreceptor an Monocyten war der an Lymphocyten durch EDTA nicht hemmbar, während eine Trypsinbehandlung zu einer Hemmung der Reaktion an beiden Zellarten führte. Bei 9 von 10 Patienten mit chronisch lymphatischer Leukämie war der Prozentsatz rosettenbildender Lymphocyten signifikant niedriger als der bei Normalpersonen.
    Type of Medium: Electronic Resource
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  • 13
    Electronic Resource
    Electronic Resource
    Springer
    Journal of molecular medicine 50 (1972), S. 484-486 
    ISSN: 1432-1440
    Keywords: Cytotoxic antibodies ; Lymphocytes ; Lupus erythematosus ; Cytotoxische Antikörper ; Lymphocyten ; Lupus erythematodes ; Autoantikörper
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Zusammenfassung Seren von Patienten mit Lupus erythematodes, mit primär chronischer Polyarthritis, mit lymphoproliferativen Erkrankungen sowie verschiedenen Erkrankungen mit antinucleären Antikörpern wurden auf das Vorhandensein von Antikörpern gegen autologe Lymphocyten, sog. „Lymphocytotoxine“ getestet. Diese Lymphocytotoxine konnten fast ausschließlich bei Patienten mit LE nachgewiesen werden. Von 12 Patienten mit LE fehlten diese Antikörper nur in einem Fall. Ihr Auftreten war unabhängig von der Aktivität der Erkrankung. Die Virusätologie als Ursache der Entstehung des LE wird diskutiert.
    Notes: Summary Sera of patients suffering from Lupus erythematosus (LE), rheumatoid arthritis, lymphoproliferative disorders and various diseases with a high incidence of antinuclear antibodies were investigated with regard to antibodies against autologous lymphocytes, the so called “lymphocytotoxins”. These lymphocytotoxins were detected almost exclusively in patients with LE. They were present in 11 of 12 patients with LE in active as well as in successfully treated cases. The etiology of the disease is discussed in the light of these findings.
    Type of Medium: Electronic Resource
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  • 14
    Electronic Resource
    Electronic Resource
    Springer
    Journal of molecular medicine 54 (1976), S. 699-708 
    ISSN: 1432-1440
    Keywords: Lymphoproliferative Erkrankungen ; B-Lymphozyten ; T-Lymphozyten ; Lymphoproliferative disorders ; B-lymphocytes ; T-lymphocytes
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Summary The characterization of lymphocyte subpopulations by means of surface markers improved our understanding of the immunopathology of lymphoproliferative disorders. In chronic lymphocytic leukemia an accumulation of B-lymphocytes have been documented. The antibody deficiency syndrome in these patients might well reflect a maturation defect of the leukemic B-lymphocytes. In patients with Hodgkin's disease the relative number of B- and T-lymphocytes in the blood was not markedly altered in comparison to normal controls. An increased proliferation primarily of T-lymphocytes however, might suggest their accelerated turnover as an indication of the host response. In most patients with “Non-Hodgkin” lymphomas high numbers of B-lymphocytes were found in affected lymph nodes, and these appear occasionally in the peripheral blood. Differences in immunopathological manifestations of the various subgroups of the “Non-Hodgkin” lymphomas are emphasized and the rare occurrence of lymphomas of T-lymphocytes (mainly observed in lymphoblastic lymphomas and in Sézary syndrome) is discussed. Immunopathological alterations in immunocytomas and the myelomas are considered in respect to the involvement of B-lymphocytes at different stages of maturation.
    Notes: Zusammenfassung Die Charakterisierung verschiedener Lymphozytenpopulationen mittels Oberflächenmarker hat zum immunpathologischen Verständnis der verschiedenen lymphoproliferativen Erkrankungen wesentlich beigetragen. So konnte die chronische Lymphadenose als Erkrankung der B-Lymphozyten charakterisiert werden. Bei Patienten mit Morbus Hodgkin liegt der Anteil von B- und T-Lymphozyten im peripheren Blut annähernd im Normbereich. Die vermehrte Proliferation von T-Lymphozyten könnte auf einen gesteigerten Umsatz dieser Zellen im Rahmen einer Immunantwort hindeuten. Bei Patienten mit „Non-Hodgkin“-Lymphomen konnte ein vermehrter Anteil von B-Lymphozyten in befallenen Lymphknoten gefunden werden, im peripheren Blut war diese Vermehrung allerdings selten. Veränderungen der einzelnen Lymphozytenpopulationen bei den verschiedenen Formen von „Non-Hodgkin“-Lymphomen sowie die seltenen Formen von T-Zell Lymphomen (lymphoblastolische Lymphome und Sézary-Syndrom) werden besprochen. Die Ergebnisse bei Immunozytomen und Myelomen werden im Hinblick auf die verschiedenen Reifungsstufen der B-Lymphozyten diskutiert.
    Type of Medium: Electronic Resource
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  • 15
    Electronic Resource
    Electronic Resource
    Amsterdam : Elsevier
    Cryobiology 5 (1969), S. 379-384 
    ISSN: 0011-2240
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Biology , Medicine
    Type of Medium: Electronic Resource
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  • 16
    ISSN: 1432-0584
    Keywords: Galactose-oxidase technique ; Surface glycoproteins ; Human leukocytes
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary This study aimed to investigate high molecular weight surface glycoprotein (S-GP) patterns on various types of human leukocytes. S-GP were externally labelled by the Galactose-oxidase-NaB3H4 technique. Results based on the analysis of 120 samples derived from different types of normal and malignant leukocytes indicate that (i) the relative expression of high molecular weight S-GPs changes during haemopoietic cell differentiation and (ii) to some extent these changes enable the classification of human leukocytes.
    Type of Medium: Electronic Resource
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  • 17
    ISSN: 1432-0584
    Keywords: Acute promyelocytic leukemia ; Reverse transcriptase polymerase chain reaction ; Minimal residual disease ; Promyelocytic leukemia ; Retinoic acid receptorα
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract The PML/RARα fusion RNA can be detected in acute promyelocytic leukemia (APL), cytogenetically characterized by the translocation t(15; 17). Our study included ten newly diagnosed patients with APL who were investigated during the course of their diseases using reverse transcription polymerase chain reaction (RT-PCR). At diagnosis, aberrant fragments with a size heterogeneity due to alternative spliced products were detected in all patients, we observed breakpoints within bcr3 (short type) in two patients and bcr1 and 2 breakpoints (long type) in eight patients. Treatment consisted of all-trans retinoic acid (ATRA) in all patients; six patients received simultaneous cytostatic therapy during remission induction. At the time of complete hematological remission (CR), only two patients showed a negative RT-PCR result; eight of the ten patients were still PCR positive when nested primers were used. Subsequently, eight patients received consolidation chemotherapy and became PCR negative. Seven of eight patients are in continuous complete remission (median remission duration: 21 months, range: 11+−26+ months). One patient of the chemotherapy group became PCR positive after 4 months in complete remission and relapsed after 6 months. The remaining two patients who were treated only with ATRA relapsed, received induction chemotherapy, and are in second and third complete remission, respectively. In conclusion, PCR negativity can be achieved only by chemotherapeutic consolidation; patients treated with ATRA alone remain PCR positive. Relapse is always preceded by a positive PCR result. Surprisingly, also patients without measurable PML/ RARα-mRNA in sequential analyses after cytostatic treatment became PCR positive and experienced relapse.
    Type of Medium: Electronic Resource
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  • 18
    ISSN: 1432-0584
    Keywords: Key words Acute promyelocytic leukemia ; Reverse transcriptase polymerase chain reaction ; Minimal residual disease ; Promyelocytic leukemia ; Retinoic acid receptor α
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract  The PML/RARα fusion RNA can be detected in acute promyelocytic leukemia (APL), cytogenetically characterized by the translocation t(15; 17). Our study included ten newly diagnosed patients with APL who were investigated during the course of their diseases using reverse transcription polymerase chain reaction (RT-PCR). At diagnosis, aberrant fragments with a size heterogeneity due to alternative spliced products were detected in all patients, we observed breakpoints within bcr3 (short type) in two patients and bcr1 and 2 breakpoints (long type) in eight patients. Treatment consisted of all-trans retinoic acid (ATRA) in all patients; six patients received simultaneous cytostatic therapy during remission induction. At the time of complete hematological remission (CR), only two patients showed a negative RT-PCR result; eight of the ten patients were still PCR positive when nested primers were used. Subsequently, eight patients received consolidation chemotherapy and became PCR negative. Seven of eight patients are in continuous complete remission (median remission duration: 21 months, range: 11+–26+ months). One patient of the chemotherapy group became PCR positive after 4 months in complete remission and relapsed after 6 months. The remaining two patients who were treated only with ATRA relapsed, received induction chemotherapy, and are in second and third complete remission, respectively. In conclusion, PCR negativity can be achieved only by chemotherapeutic consolidation; patients treated with ATRA alone remain PCR positive. Relapse is always preceded by a positive PCR result. Surprisingly, also patients without measurable PML/RARα-mRNA in sequential analyses after cytostatic treatment became PCR positive and experienced relapse.
    Type of Medium: Electronic Resource
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