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  • 1
    Electronic Resource
    Electronic Resource
    Springer
    Journal of molecular medicine 52 (1974), S. 305-317 
    ISSN: 1432-1440
    Keywords: Alkaline leukocyte phosphatase ; Bone marrow biopsy ; Folic acid level ; Histamin level ; Immunoglobulins ; Myeloid metaplasia ; Myelofibrosis — clinical findings ; — course ; — experimental reproduction ; Myelosclerosis ; Alkalische Leukocyten-Phosphatase ; Bekkenkamm-Biopsie bei OMF ; Folsäure-Spiegel bei OMF ; Histamin-Spiegel bei OMF ; Immunglobuline bei OMF ; Myeloide Metaplasie ; Osteomyelofibrose — klinischer Befund ; — Verlauf ; — tierexperimentelle Erzeugung ; Osteomyelosklerose
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Zusammenfassung Bei der Osteomyelofibrose handelt es sich z.T. um autonom-proliferative Erkrankungen, z.T. um zu Nekrosen und terminaler Fibrosierung führende, durch unbekannte Stimuli ausgelöste Knochenmarks-Prozesse. Diese zweite Entstehungsmöglichkeit wird u.a. durch tierexperimentelle Untersuchungen gestützt, die die Entwicklung von generalisierten Markfibrosen bei rezidivierenden Antigen-Antikörper-Reaktionen zeigen. Díese durch die Trias „Markfibrose (evtl. mit Knochenumbau), extramedulläre Blutbildung und erythroleukämisches Blutbild“ charakterisierte Krankheitsgruppe zeigt im Einzelfall weite Unterschiede hinsichtlich der klinischen Befunde, der Labor-Untersuchungen und des Verlaufs. So ist eine sichere Diagnose nur durch die histologische Knochenmarks-Untersuchung möglich, die gelegentlich die Abgrenzung proliferativer Krankheitsformen gegenüber reaktiv-nekrotisierenden Markprozessen gestattet. Bemerkenswerterweise sind in über der Hälfte der Fälle die Immunglobuline (in der Regel γ-G-Globuline) vermehrt. Bei der Therapie werden die Indikationen zur Splenektomie hervorgehoben, während Cytostatika oder Corticoide nur ausnahmsweise Verwendung firden.
    Notes: Summary A survey is presented on the theories concerning the nosology as well as the clinical and laboratory findings in myelofibrosis. In some cases the disease is a proliferative process, while in others necrosis of myeloid tissue is provoked by unknown stimuli and terminates in fibrosis of the marrow. This concept is underscored by experimental studies which show generalized marrow fibrosis in rabbits during repeated antigen-antibody reactions. Clinical and laboratory findings as well as the course vary widely from one case to the other. Histological examination of a marrow biopsy is essential for the diagnosis; the histological pattern sometimes allow to distinguish between proliferative and reactive-necrotizing forms. The immunoglobulins (mostly γ-G-globulins) are elevated in more than 50% of the cases, which together with sometimes positive findings of antibodies against collagen point in the direction of an inflammatory process. In therapy the indications of splenectomy are stressed, whereas cytostatic drugs or corticoids are used only in selected cases.
    Type of Medium: Electronic Resource
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  • 2
    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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