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  • 1
    Electronic Resource
    Electronic Resource
    Amsterdam : Elsevier
    Biochemical and Biophysical Research Communications 33 (1968), S. 136-139 
    ISSN: 0006-291X
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Biology , Chemistry and Pharmacology , Physics
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Springer
    Journal of molecular medicine 54 (1976), S. 235-237 
    ISSN: 1432-1440
    Keywords: DNA-dependent RNA-polymerase B ; Functional properties and regulation ; Leukemia ; DNS-abhängige RNS-Polymerase B ; Funktionelle Differenzierung und Regulation ; Leukaemie
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Zusammenfassung Es werden die spezifischen Aktivitäten von zwei funktionell unterschiedlichen Fraktionen der α-Amanitin-inhibierbaren DNS-abhängigen RNS-Polymerase in Zellkernen normaler menschlicher Lymphocyten (NL) sowie von Lymphocyten bei chronischer lymphatischer Leukämie (CLL) bestimmt. Die Aktivität der „freien“ RNS-Polymerase bei CLL beträgt 0,133 gegenüber 0,209 pMol (3H)-UMP/106 Zellen in normalen Lymphocyten. Die Aktivitäten der „gebundenen“ Enzyme liegen bei 0,139 (CLL) bzw. 0,132 pMol (3H)-UMP/106 Zellen (NL). Durch 400 ng/ml Rifamycin AF/013 wird das „freie“ Enzym in NL und CLL völlig inhibiiert, während das „gebundene“ Enzym noch 70% seiner Aktivität aufweist. Da „freie“ Enzym in CLL-Lymphocyten wird durch 1,0 ng/ml α-Amanitin zu 50% inhibitiert, während dieses Enzym in NL sowie die „gebundenen“ Enzyme in NL und CLL zu mehr als 90% inaktiviert werden.
    Notes: Summary Specific activities are determined of two functional fractions of α-amanitin sensitive DNA-dependent RNA polymerases in nuclei from human normal and chronic lymphocytic leukemia lymphocytes. Specific activity of “free” RNA polymerase in CLL corresponds to 0.133 pmoles (3H)-UMP/106 cells as compared to 0.209 in normals. Activities of the “engaged” enzymes are 0.139 in CLL and 0.132 in normals. “Free” enzymes in NL and CLL are completely inhibited by 400 ng/ml Rifamycin AF/013, while the “engaged” enzymes exhibit 70% of their original activity. 1.0 ng/ml α-amanitin suppress 50% of the activity of the “free” enzyme in CLL. The “free” enzyme in NL and the “engaged” enzymes in NL and CLL do not show any residual activity in the presence of 1.0 ng/ml α-amanitin.
    Type of Medium: Electronic Resource
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  • 3
    ISSN: 1432-1440
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Type of Medium: Electronic Resource
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  • 4
    ISSN: 1432-1440
    Keywords: Acridine dyes ; actinomycin D ; blood cells ; biosynthesis of nucleic acid ; RNA polymerases ; Acridinfarbstoffe ; Actinomycin D ; Blutzellen ; Nukleinsäurebiosynthese ; RNS-Polymerasen
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Zusammenfassung Acridinfarbstoffe hemmen in gleichem Umfang wie Actinomycin D den Einbau von3H-Thymidin und3H-Uridin in intakten Zellen, inhibieren im Gegensatz zum Actinomycin D jedoch erst bei hundertfach höheren Konzentrationen die DNS-abhängige RNS-Polymerase im zellfreien System. Ferner wird in intakten Zellen bei Farbstoffeinwirkung eine Verminderung der intrazellulären Uridin- und Thymidinpools beobachtet. Es wird u.a. eine unspezifische Interaktion der Farbstoffe mit der Zellmembran diskutiert.
    Notes: Summary Acridine dyes inhibit the incorporation of3H-thymidine and3H-uridine in intact cells to the same extent as Actinomycin D. In contrast to Actinomycin D, RNA synthesis by DNA — dependent RNA polymerase in a cell-free system is inhibited at lo2 higher concentrations of acridine dyes, only. Possible differential effects on the cell membrane resulting in decreased intracellular pools of uridine and thymidine are discussed.
    Type of Medium: Electronic Resource
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  • 5
    Electronic Resource
    Electronic Resource
    Springer
    Journal of molecular medicine 51 (1973), S. 730-734 
    ISSN: 1432-1440
    Keywords: Leukocytes ; Leukemia ; RNA-polymerase ; RNA-metabolism ; Leukocyten ; Leukämie ; RNS-Polymerase ; RNS-Stoffwechsel
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Zusammenfassung Lymphocyten und Leukocyten (Lymphocyten + Granulocyten) werden aus 10–40 ml heparinisiertem Venenblut isoliert, homogenisiert und 15 min bei 1000 g zentrifugiert. In dem aus Zellkernen und Kerntrümmern bestehenden Sediment lassen sich nach Resuspension ca. 70% der DNA-abhängigen RNS-Polymerase-Aktivität des Homogenats nachweisen. Die Reaktion ist von zugesetzter DNS und der Gegenwart aller vier Ribonucleosid-Triphosphate abhängig. Bei chronisch lymphatischer Leukämie, chronisch myeloischer Leukämie und Morbus Hodgkin findet sich unter diesen Bedingungen eine höhere spezifische Aktivität der DNS-abhängigen RNS-Polymerase als bei Normalpersonen.
    Notes: Summary Lymphocytes and leukocytes (lymphocytes + granulocytes), isolated from 10–40 ml of heparinized venous blood, are homogenized, and centrifuged for 15 min at 1000 g. The resuspended pellet, consisting of nuclei and nuclear debris, exhibits ca. 70% of the DNA-depenent RNA polymerase activity of the homogenate. The reaction depends on added DNA template and the presence of all four ribonucleoside triphosphates. In chronic lymphatic leukaemia, chronic myelocytic leukemia, and Hodgkin's disease, the activity of the DNA-dependent RNA polymerase is higher than in normal controls.
    Type of Medium: Electronic Resource
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  • 6
    Electronic Resource
    Electronic Resource
    Springer
    Journal of molecular medicine 53 (1975), S. 311-316 
    ISSN: 1432-1440
    Keywords: DNA-dependent RNA polymerases ; leukemia ; prognostic factors ; DNS-abhängige RNS-Polymerasen ; Leukämie ; prognostische Kriterien
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Zusammenfassung Die spezifischen Aktivitäten der DNS-abhängigen RNS-Polymerasen A und B wurden in von exogener Matrizen-DNS abhängiger Form bei verschiedenen Hämoblastosen bestimmt. Die Aktivitätsbestimmungen erfolgten in Kernhomogenaten isolierter mononucleärer oder segmentkerniger Leukocyten. Eine signifikante Erhöhung der Polymeraseaktivitäten A und B fand sich in den Kernhomogenaten mononucleärer Zellen bei akuter myeloischer Leukämie, während diese bei chronisch-myeloischer Leukämie (signifikant) und chronisch-lymphatischer Leukämie (nicht signifikant) erniedrigt waren. Unter cytostatischer Therapie findet sich eine Angleichung der Polymeraseaktivitäten an den Normbereich. Hiermit ergeben sich möglicherweise neue Kriterien zur Verlaufsbeurteilung von Hämoblastosen unter einer Polychemotherapie.
    Notes: Summary Specific Activities of DNA-dependent RNA polymerases A and B have been determined in nuclei from leukocytes in acute and chronic leukemia. Enzyme activities, dependent on exogenous DNA template, were determined in homogenates of nuclei from isolated mononuclear cells or from isolated granulocytes. Activities of polymerases A and B have been found significantly elevated in homogenates of nuclei from mononuclear cells in acute myelocytic leukemia, while they were found subnormal in corresponding cell fractions from chronic myelocytic leukemia and chronic lymphatic leukemia. During cytostatic treatment polymerase activities were approaching normal values. The prognostic relevance of these data for the course of human leukemia is discussed.
    Type of Medium: Electronic Resource
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  • 7
    ISSN: 1432-1335
    Keywords: TdT micromethod ; Acute leukemia
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary A micromethod for the determination of TdT in peripheral leukocytes and bone marrow cells has been developed that allows unequivocal identification and quantitation of TdT in less than 1 x 106 leukocytes from ALL patients, i.e., in 1 ml of peripheral blood and/or 0.5 ml of bone marrow obtained during routine clinical sampling. The method involves disruption of cell pellet with high salt and detergent followed by centrifugation of extracts at 12,000 x g and partial purification on phosphocellulose matrix by a batch elution technique using a standard laboratory microcentrifuge. Using this microassay, TdT activities have been determined in 500 samples of peripheral blood and bone marrow of 240 adult patients with acute leukemias (86 ALL, 108 ANLL, 44 blastic CML, two acute leukemias following P. vera). From an analysis of our data based on TdT activity, cell surface markers and growth patterns in soft agar and observations published in the literature, it can be concluded that the frequencies of TdT + phenotypes in the various clinicalmorphological diagnostic groups are approximately 95% in ALL, 10% in ANLL, 50% in AUL, and 35% in blastic CML. Since the presence of high TdT activity is clearly associated with clinical response to specific forms of chemotherapy in blastic CML and most probably, also in ANLL, the determination of TdT should be considered in all cases of acute leukemias to objectively define prognostically important subgroups which can not be diagnosed by conventional means.
    Type of Medium: Electronic Resource
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  • 8
    ISSN: 1279-8509
    Keywords: Autologous bone marrow transplantation ; Autologous peripheral blood stem cell transplantation ; High-dose chemotherapy ; Second primary neoplasms
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract We treated 500 patients with high-dose chemotherapy and autologous bone marrow or autologous peripheral blood stem cell transplantation. Treated conditions included leukemia, lymphoma, breast cancer, lung cancer, germ-cell carcinoma, and other solid tumors. 10/500 (2%) of patients were treated for a second malignancy diagnosed 12 months to 25 years after their initial neoplasm. Four of these ten patients are in complete remission (CR) of both malignancies at a median follow-up of 29+ months after high-dose chemotherapy and autotransplantation. None of these patients would have been eligible for high-dose chemotherapy and autotransplantation by conventional selection criteria which usually exclude patients with a history of prior malignancies. Conclusion. Conventional exclusion criteria for high-dose chemotherapy and autotransplantation may not adequately reflect the prognosis of patients with second or secondary malignancies treated with this therapeutic modality. High-dose chemotherapy and autologous hematopoietic stem cell transplantation may be of true benfit in selected cases of secondary malignancies.
    Type of Medium: Electronic Resource
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  • 9
    Electronic Resource
    Electronic Resource
    Springer
    Annals of hematology 58 (1989), S. 117-128 
    ISSN: 1432-0584
    Keywords: Hematopoietic growth factors ; In vitro effects ; Progenitor cells ; Mature end-cells
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary Recombinant DNA technology has been central in answering some of the most relevant questions in the research of regulation of the functional status of hematopoietic progenitor cells and their progeny. This leading article will focuse on recent results that have emerged from studies utilizing recombinant molecules that control hematopoietic blood cell development and activation. The following features will be detailed: The molecular and biological characteristics and biochemistry of hematopoietic growth factors, synergizing factors and releasing factors, their role in the regulation of hematopoiesis and activation of normal and leukemic cells, their cellular sources, and regulation of production.
    Type of Medium: Electronic Resource
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  • 10
    ISSN: 1432-0584
    Keywords: High grade Non Hodgkin's lymphoma ; Upfront therapy ; Salvage therapy ; MACOP-B
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary Between Nov. 1985 and Nov. 1988, sixty-three patients with high grade malignant (hg) and intermediate grade malignant (img) Non Hodgkin's Lymphoma (NHL) were treated with MACOP-B (methotrexate, doborubicin, cyclophosphamide, vincristine, prednison and bleomycin). Thirty-seven patients received MACOP-B as an upfront treatment modality, whereas twenty-six patients had relapsed disease and received MACOP-B as a salvage protocol. Four weeks after termination of therapy, 75% of patients with de novo NHL and 72% of the patients with relapsed NHL were in complete remission (CR). In the group of newly diagnosed NHL, 22% achieved partial remission (PR) and 3% no change (NC), whereas in the group with relapsed disease 14% had PR and 14% had progressive disease (PD). At a medium follow-up of 12 months (range 1 month to 33 months), 74% of patients with de novo NHL continued to be in CR whereas the continuous CR rate in patients with relapsed disease was 35%. Overall survival after 30 months of observation for the patient group with de novo NHL was 75% and 40% for patients with relapsed NHL. The mean duration for completion of the projected 12 chemotherapy cycles, given in weekly intervals, was 12.9 and 13.5 weeks in upfront or salvage therapy, respectively. With low incidence of major toxicities, application of drugs on an outpatient basis, and high efficacy, MACOP-B shows substantial advantges for therapy of de novo and relapsed NHL.
    Type of Medium: Electronic Resource
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