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  • 1
    ISSN: 1432-0584
    Keywords: Karyotype ; Bladder carcinoma ; Ultrastructure ; CSF ; Cell line
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary The cell line 5637 which originated from a human urinary bladder carcinoma is known to produce GM-CSF and Multi-CSF ectopically. Determination of cell surface antigens defined by monoclonal antibodies was recently reported [6]. Here we report on the ultrastructure and karyology of this CSF secreting cell line. At the ultrastructural level the monolayer in vitro culture and the solid tumors formed in nude mice showed all characteristics consistent with a well-differentiated transitional cell carcinoma (TCC). A subclone was found to grow in suspension and did not secrete any CSF activity. High resolution chromsome analysis revealed chromosomal abnormalities which agreed only in few particulars with nonrandom chromosomal aberrations usually found in TCC. Analysis of the cytogenetic results showed that nearly all structural abnormalities present are known to be associated with acute or chronic human leukemia. The possibility that the ectopic production of CSF in this cell line may be correlated to one or more of the described chromosomal aberrations is discussed.
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Springer
    Journal of molecular medicine 60 (1982), S. 667-672 
    ISSN: 1432-1440
    Keywords: Calcitonin ; Serum and tissue levels ; Leukemia ; Lymphoma ; Diagnostic value ; Calcitonin ; Serum- und Gewebespiegel ; Leukämie ; Lymphome ; diagnostischer Wert
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Zusammenfassung Das Vorkommen erhöhter Serumspiegel von immunreaktivem Calcitonin (CT) wurde bei menschlichen myeloproliferativen und lymphoproliferativen Erkrankungen untersucht. Unter Zugrundelegung des doppelten oberen Normalbereiches zeigten etwa 45% der Patienten mit akuter Leukämie und mit Blastenschub bei chronischer myeloischer Leukämie erhöhte Calcitonin-Serumspiegel. Extrem erhöhte Werte (〉 1000 pg/ml) waren nur in dieser Patientengruppe nachweisbar. Mit dem Eintritt einer Remission kam es zu einem Abfall oder einer Normalisierung der CT-Werte, während bei Eintreten eines Rezidivs ein frühzeitiger Wiederanstieg beobachtet wurde. Dies läßt annehmen, daß die Serumspiegel die Aktivität der Erkrankung wiedergeben. Bei Patienten mit chronischen Leukämien, Morbus Hodgkin und Nicht-Hodgkin-Lymphomen war die Häufigkeit und das Ausmaß der Calcitoninerhöhung im Serum deutlich geringer. Darüber hinaus wurde die Molekulargewichtsverteilung des Proteohormons in Serumproben und Zellextrakten durch Gelchromatographie untersucht. Neben dem physiologischen Hormon fanden sich unterschiedliche hochmolekulare Formen im Serum und in Milzzellextrakten. In Leukämiezellextrakten war ausschließlich hochmolekulares Calcitonin nachweisbar. Es wird angenommen, daß Calcitonin ektop durch die leukämischen Zellen produziert wird.
    Notes: Summary The incidence of elevated serum levels of immunoreactive calcitonin (CT) in human myeloproliferative and lymphoproliferative disorders was investigated. On the basis of twice the normal range, about 45% of patients with acute leukemia and blast crisis of chronic myelocytic leukemia (CML) showed elevated serum levels of CT. Markedly elevated levels (〉 1,000 pg/ml) were only found in this group. Since immunoreactive CT dropped to normal or only slightly elevated levels in remission and increased again before or during relapse, serum CT levels seem to reflect the activity of the disease. However, in patients with chronic leukemia, Hodgkin's and non-Hodgkin's lymphoma, a lower incidence and only slightly elevated serum values were found. In addition, the molecular weight of the proteohormone in serum specimen and cell extracts was investigated by gel chromatography. Besides physiological CT, different high-molecular weight forms of the hormone could be demonstrated in serum and in cell extracts. Extracts of leukemic cells revealed higher molecular forms only. It is suggested that the proteohormone is ectopically produced by leukemic cells.
    Type of Medium: Electronic Resource
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  • 3
    ISSN: 1432-0584
    Keywords: Granulocytes ; CSF ; Oxidative metabolism ; Bladder carcinoma
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary Neutrophils (PMN) are the major host defence cells protecting the body against invasion by microorganisms. Products of oxidative metabolism mediate PMN microbicidal and tumoricidal activity, but the mechanisms by which these pathways become activated are not well understood. The colony stimulating factors (CSF) are known to stimulate proliferation and differentiation of committed bone marrow stem cells. These regulators may probably play an important role in non specific resistance to infections. We studied the oxidative metabolism of neutrophils after stimulation with recombinant GM-CSF (r.GM-CSF) and the concentrated conditioned medium of the UBC-5637 cell line (UBC-CM) showing CSF activity. It could be demonstrated that the r.GM-CSF, as well as the UBC-CM, induce an activation of the neutrophil respiratory burst without any cofactors such as f-MLP, PMA, or zymosan. In addition, we observed an increase of the response to those stimulants in the presence of either r.GM-CSF or UBC-CM. These effects were not endotoxin-induced, since stimulation persisted after addition of Polymyxin B, which is known to inhibit the action of endotoxins.
    Type of Medium: Electronic Resource
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  • 4
    ISSN: 1432-0584
    Keywords: T-LGL ; Leukemia ; G-CSF
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary Severe neutropenia is a common feature in patients with T-large granular lymphocytic (LGL) leukemia. Neutropenia often causes severe infections and septicemia, thus representing a major cause of morbidity and mortality in this disease. We have treated two outpatients with T-LGL leukemia who had severe neutropenia (neutrophils 〈0.2×109/l) successfully with G-CSF (5μg/kg daily, s.c). After 10 days of treatment the neutrophil count was within the normal range and a severe oral infection healed rapidly. We conclude that G-CSF therapy is able to normalize the neutrophil count in T-LGL leukemia within a few days and that it can be used to treat severe infections in these patients even on an outpatient basis.
    Type of Medium: Electronic Resource
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