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  • 1
    ISSN: 1432-1440
    Keywords: Haarzelleukämie ; IFN-Therapie ; Zellmarker ; Thymidineinbau
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Zusammenfassung In einer multizentrischen „open label“ Studie mit IFN-α2b wurden 85 Patienten mit Haarzell-Leukämie behandelt und ausgewertet. Die Induktionsbehandlung bestand in 2 × 106 E IFN-α2b/m2, 3 × wöchentlich, s.c. Die Ergebnisse zeigen die hohe Effektivität der Substanz, wobei unter den verwendeten Dosierungen geringe, gut tolerierbare und passagere Nebenwirkungen im Sinne eines grippeähnlichen Syndroms auftraten. Die Prozentzahl der Remissionen (CR + PR + MR) nach sechsmonatiger Behandlungszeit lag bei 89%, der Anteil von CR betrug 4%, von PR 69%. An einer kleinen Gruppe (4 Patienten) wurde nach Erzielen einer CR oder PR der Effekt unterschiedlicher Formen der Erhaltungstherapie getestet. Die bisherigen, statistisch noch nicht auswertbaren Resultate sprechen dafür, daß bei Auftreten eines Rückfalles nach Aussetzen oder Verringerung der IFN-Dosis (3 × 106 I.E., s.c., 1 × wöchentlich) durch Wiedereinsetzen oder Erhöhung von IFN-α2 neuerlich Remissionen erzielt werden können. Zur Erhaltung der Remissionen dürfte eine IFN-Dauertherapie notwendig sein. Mittels eines Kurzzeit in vitro Tests werde der Effekt von Interferon α2 auf die Inkorporation von H3-Thymidin und H3-Uridin in Haarzellen bestimmt. Für beide Präkursoren ergab sich keine Hemmung des Einbaues. Allerdings zeigte eine Langzeitinkubation (48 h) einen signifikant vermehrten H3-Uridin Einbau, während der H3-Thymidin Einbau unbeeinflußt blieb. Diese Resultate sprechen gegen einen unmittelbaren antiproliferativen Effekt von IFN-α2 auf Haarzellen, sie weisen aber auf eine Induktion der RNS-Synthese hin. Eine Zellmarker-Analyse der Haarzellen mit monoklonalen Antikörpern vor und während einer 7tägigen in vitro Behandlung mit IFN-α2 ergab keine Änderung des Phänotyps, so daß eine differenzierende Wirkung des IFN auf Haarzellen nicht beobachtet werden konnte.
    Notes: Summary Eighty-five patients with hairy-cell leukemia were treated in a multicentric “open label” study with IFN-α2b and evaluated. Induction therapy was 2 × 106 U IFN-α2b/m2, 3 times a week, s.c. The results show this regimen to be highly effective with only a few tolerable and transient side effects consisting mainly of flu-like symptoms. After 6 months of therapy 4% CR, 69% PR, and 16% MR, were noted. In a small group of four patients who had achieved CR or PR, we tested the effect of varying doses for maintenance therapy. Our preliminary results indicate that a relapse caused by interruption of IFN therapy or dose reduction to 3 × 106 U given once a week, o.c. could be successfully treated by readministration, or escalating the dosage of IFN. It seems that remission maintenance requires long-term treatment with IFN. In a short-term in vitro test we studied the effect of IFN-α2 on the incorporation of3H-thymidine and3H-uridine into hairy cells of five patients. Fort both precursors no appreciable effect was detected. However, after prolonged incubation for 48 h, a significant enhancement of3H-uridine incorporation was observed, while3H-thymidine incorporation remained unaffected. Cell marker analysis performed with monoclonal antibodies before and after incubation of hairy cells with IFN-α2 for up to 7 days did not reveal any change of the phenotype of hairy cells.
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Amsterdam : Elsevier
    Physica C: Superconductivity and its applications 235-240 (1994), S. 2695-2696 
    ISSN: 0921-4534
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Physics
    Type of Medium: Electronic Resource
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  • 3
    Electronic Resource
    Electronic Resource
    Amsterdam : Elsevier
    Physica B: Physics of Condensed Matter 194-196 (1994), S. 377-378 
    ISSN: 0921-4526
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Physics
    Type of Medium: Electronic Resource
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  • 4
    Electronic Resource
    Electronic Resource
    Amsterdam : Elsevier
    Physica B: Physics of Condensed Matter 194-196 (1994), S. 377-378 
    ISSN: 0921-4526
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Physics
    Type of Medium: Electronic Resource
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  • 5
    Electronic Resource
    Electronic Resource
    [s.l.] : Nature Publishing Group
    Nature 218 (1968), S. 1051-1053 
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] These results indicate that the state of the intracellular water is characteristic of the physiological state of the nerve trunk. It was therefore felt that the characteristics of the intracellular water should be affected by the application of various local anaesthetics in a way indicative of the ...
    Type of Medium: Electronic Resource
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  • 6
    Electronic Resource
    Electronic Resource
    [S.l.] : American Institute of Physics (AIP)
    Review of Scientific Instruments 64 (1993), S. 2920-2925 
    ISSN: 1089-7623
    Source: AIP Digital Archive
    Topics: Physics , Electrical Engineering, Measurement and Control Technology
    Notes: We have built a low temperature scanning force microscope which is able to measure contact and noncontact forces using the dc modes of force microscopy. We demonstrate the capabilities of our instrument on a magneto-optical disk at room temperature and at 77 K. Using a ferromagnetic thin film tip, the topography and the micromagnetic stray field of the sample is measured using the dc modes of force microscopy. The topographic and magnetic data are precisely correlated. The circular bit structure and the natural domain structure between the homogeneously magnetized bits is clearly visible. A lateral resolution below 100 nm and a force resolution of 10−12 N is reproducibly achieved.
    Type of Medium: Electronic Resource
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  • 7
    Electronic Resource
    Electronic Resource
    Springer
    The European physical journal 88 (1992), S. 317-320 
    ISSN: 1434-6036
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract We have examined a single flux line in the semi-infinite type-II superconductor. The stray magnetic field of the flux line has been calculated. We have found that the vertical force exerted on a magnetic force microscopy (MFM) tip from the flux line is measurable by currently existing MFM. Two types of magnetic tips were taken into consideration, solid and thin film tips. For example, with a Cobalt film of the thickness of 100 nm and 30 nm on a tip, we found a vertical force of 4*10−10 N and 1.5*10−10 N, respectively. The lateral force exerted on a tip by the flux line was also calculated. The lateral force must be small enough to prevent the flux line from becoming depinned.
    Type of Medium: Electronic Resource
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  • 8
    Electronic Resource
    Electronic Resource
    Springer
    Archives of gynecology and obstetrics 117 (1922), S. 239-239 
    ISSN: 1432-0711
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Type of Medium: Electronic Resource
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  • 9
    Electronic Resource
    Electronic Resource
    Springer
    Journal of biological physics 3 (1975), S. 142-154 
    ISSN: 1573-0689
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Physics
    Notes: Abstract Laser light is scattered off the surface of nerve from the walking legs ofHomarus Americanus and the spectral power density of the Rayleigh line is obtained. The data is interpreted in terms of a relaxation time of a scattering unit. The experimental results are consistent with a scattering unit having a molecular weight of the order of 30,000 in a medium of several poise viscosity. The relaxation time for scattering is calculated to be 16±2μsec in the resting state and 10±2μsec in the depolarized state.
    Type of Medium: Electronic Resource
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  • 10
    Electronic Resource
    Electronic Resource
    Springer
    Journal of biological physics 4 (1976), S. 109-114 
    ISSN: 1573-0689
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Physics
    Notes: Abstract It is shown by a thermodynamic argument that under isobaric and adiabatic conditions a change in the electric field applied to a non-polar dielectric will result in a temperature change. An increase in the field produces a lowering of the temperatures while a decrease of the field causes the opposite effect. It is suggested that this may be the origin of the initial positive heat observed in nerves during excitation. A numerical estimate of the size of the effect agrees well with the observed initial positive heat in rabbit vagus nerves.
    Type of Medium: Electronic Resource
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