Library

feed icon rss

Your email was sent successfully. Check your inbox.

An error occurred while sending the email. Please try again.

Proceed reservation?

Export
  • 1
    Electronic Resource
    Electronic Resource
    Springer
    Journal of molecular medicine 54 (1976), S. 461-466 
    ISSN: 1432-1440
    Keywords: Präleukämie ; Leukämie ; Zellkinetik ; Stammzellen ; DNS-Synthese ; Preleukemia ; leukemia ; cell kinetics ; stem cells ; DNA synthesis
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Summary The kinetics of erythropoietic and granulocytopoietic cell proliferation have been investigated in the same patient at two distinct stages: firstly in preleukemia presenting as pancytopenia with ineffective erythropoiesis, and secondly 2 years later in acute myelogenous leukemia. The method of investigation is based on determining the DNA synthesis rate of individual cells by means of quantitative14C-autoradiography after short-term incubation with14C-thymidine and fluorodeoxyuridine. Erythropoiesis was equally ineffective in the two stages, the rate of proliferation, however, slowed down towards the leukemic state. The production rate of myeloblasts was markedly reduced in preleukemia accompanied by a very low labelling index. In leukemia on the other hand the production rate was increased to such a degree that the leukemic myeoblast compartment is to be considered as prevailingly self-reproductive. The proliferation rate of myeloblasts was reduced already in preleukemia, and there was a further decrease in leukemia. From the point of view of cell kinetics the manifestation of leukemia in this patient is explained best by a change in the mode of proliferation: the myeloblasts change from steady state growth to behaving like an exponentially expanding population.
    Notes: Zusammenfassung Die Proliferationskinetik von Erythropoese und Granulopoese wurde bei einer Patientin in zwei verschiedenen Krankheitsstadien untersucht: zuerst im präleukämischen Stadium, das sich mit Panzytopenie mit ineffektiver Erythropoese darbot, und 2 Jahre später bei manifester akuter myeloischer Leukämie (AML). Die Untersuchungstechnik basiert auf der Bestimmung der DNS-Synthesegeschwindigkeit einzelner Zellen durch quantitative14C-Autoradiographie nach Kurzinkubation mit14C-Thymidin und Fluordesoxyuridin. In beiden Krankheitsstadien ergab sich eine in gleicher Stärke ineffektive Erythropoese, doch kam bei der AML noch eine verminderte proliferative Aktivität der einzelnen Erythroblasten hinzu. In der präleukämischen Phase waren der Umfang der Neubildung von Myeloblasten stark vermindert und der Markierungsindex erniedrigt. Demgegenüber war die Neubildungsrate von Myeloblasten im leukämischen Stadium so stark erhöht, daß dieses Zellkompartiment als überwiegend selbst-reproduktiv anzusehen ist. Dabei fand sich bereits bei der Präleukämie eine verminderte Proliferationsgeschwindigkeit der einzelnen Myeloblasten, ein Verhalten, das sich zur Leukämie hin verstärkte. Aus dem Blickwinkel der Proliferationskinetik ist die klinische Manifestation der Leukämie dieser Patientin am besten durch eine Änderung des Proliferationsmodus erklärbar: Aus einem Gleichgewicht zwischen Neubildung und Differenzierung (steady state-Wachstum) gehen die Myeloblasten zu einem teilweise exponentiellen Wachstum über.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 2
    ISSN: 1432-0584
    Keywords: AML blast cells ; Eosinophilic differentiation ; Diffusion chambers
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary Auer-rod positive acute myelocytic leukemia (AML) blasts from a 33-year-old patient were cultured in diffusion chambers (DC) in order to test their differentiation potential. The cells were labeled with anti-human granulocyte antiserum known to be negative for eosinophils, and evaluated using the unlabeled peroxidase-antiperoxidase (PAP) method. Parallel to a decline in the number of leukemic blasts there was an increase of up to 86% in the number of granulocytic cells belonging to the eosinophilic series. Auer-rod bodies were found in the eosinophilic cells even after 20 days in culture. Staining with anti-granulocyte antiserum failed to demonstrate positive cells at any time during DC culture. Based on the negative reaction with the anti-granulocytic antibodies already at an early stage of development evidence is provided for the existence of a progenitor cell exclusively committed to the eosinophilic pathway.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
Close ⊗
This website uses cookies and the analysis tool Matomo. More information can be found here...