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  • 1
    Electronic Resource
    Electronic Resource
    Springer
    Archives of dermatological research 270 (1981), S. 255-261 
    ISSN: 1432-069X
    Keywords: PUVA ; Suppressor cells ; Contact sensitivity ; Photosensitivity ; PUVA ; Suppressor-Zellen ; Kontaktüberempfindlichkeit ; Photosensibilisierung
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Zusammenfassung Zwei Patienten mit lang bestehender Kontaktempfindlichkeit auf Chrom wurden mit PUVA behandelt. Ein Patient, der gleichzeitig eine Photosensibilisierung aufweist, reagierte sehr günstig. Seine Haut besserte sich und die Lichttoleranz erhöhte sich. Dies war von einer Abnahme der Phototestreaktivität begleitet, die auf der PUVA-exponierten Haut (pigmentiert) graduiert werden konnte. Der Läppchentest und der Phototest auf der für PUVA geschützten Haut zeigte keine Verminderung der Hauttestreaktivität. PUVA-Behandlung verursachte eine Abnahme der Zahl der Rosettenbildenden T-Zellen und eine Intensivierung der Lymphocytenstimulation in beiden Patienten. Bei dem einen Patienten, der eine außergewöhnlich hohe PHA-induzierte Suppressor-Zellaktivität vor der Behandlung zeigte, wurden durch die Behandlung die Werte zur Norm zurückgebildet. Bei beiden Patienten wurde die PPD-induzierte Suppressor-Zellaktivität auf PWM deutlich durch PUVA-Therapie vermehrt. Andere Suppressor-Zellfunktionen waren nicht beeinträchtigt. Es wurde der Schluß gezogen, daß während der PUVA-Therapie wohl einige systemische immunologische Effekte auftreten können, der abschwächende Effekt auf die Kontaktsensibilisierung und Photosensibilisierung aber vornehmlich durch lokale Vorgänge in der Haut hervorgerufen werden.
    Notes: Summary Two male patients with longstanding contact sensitivity to chromium were treated with PUVA. One patient, suffering from concomitant photosensitivity, reacted very favorably; his skin lesions cleared and light tolerance increased. This was paralleled by a decrease in the photopatch test reactivity and by the extinction of the patch-test reactivity on PUVA-exposed (pigmented) skin. Patch and photopatch tests on PUVA-shielded skin showed no decrease in skin test reactivity. PUVA-treatment caused a decrease in the number of rosette-forming T cells and an increase in lymphocyte stimulation in both patients. In one patient, abnormally high PHA-induced suppressor cell activities were recorded prior to treatment; after PUVA therapy the values were back to normal. In both patients, the PPD-induced suppressor cell activity of PWM response was clearly increased by PUVA-therapy. Other suppressor cell functions were not much affected. It is concluded that while PUVA-therapy may produce some systemic immunological effects, its abating effect on contact sensitivity and photosensitivity is mainly mediated through local mechanisms in the skin.
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Springer
    Archives of dermatological research 272 (1981), S. 135-137 
    ISSN: 1432-069X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Type of Medium: Electronic Resource
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  • 3
    Electronic Resource
    Electronic Resource
    Springer
    Archives of dermatological research 275 (1983), S. 374-378 
    ISSN: 1432-069X
    Keywords: Contact allergy UVB ; PUVA ; Langerhans cells ; Skin test
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary A single UVB or PUVA exposure given 4 days prior to skin testing affected skin responses both to contact allergens and to histamine and the histamine liberator, compound 48/80. The delayed contact hypersensitivity reactions were attenuated by UVB in 75% and by PUVA in 79% of the tests. The immediate skin reactions to histamine and compound 48/80 were diminished by UVB in 81% and by PUVA in 46% of the cases. While the epidermal Langerhans cell (LC) density was distinctly affected by irradiation, the attenuation of skin hypersensitivity reactions seemed to be independent of the degree of LC depletion. A significant correlation was, however, found between the strength of the erythemal reaction induced by the irradiation and the attenuation of the skin hypersensitivity test reactions; this was true for both delayed and immediate skin reactions in the case of UVB and for immediate skin reactions in the case of PUVA. The mechanism behind the attenuating effect of UV radiation on skin hypersensitivity reactions remains unknown, but it probably does not result from a stabilization of the mast cell membrane, as histamine and compound 48/80 induced reactions were suppressed to a similar extent.
    Type of Medium: Electronic Resource
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  • 4
    Electronic Resource
    Electronic Resource
    Springer
    Archives of dermatological research 275 (1983), S. 315-317 
    ISSN: 1432-069X
    Keywords: 8-Methoxypsoralen ; Serum levels ; Phototoxicity ; Repeated medication
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary Nine adult volunteer dermatological patients were subjected to five repeated oral exposures of 0.6 mg/kg of 8-methoxypsoralen at near-fasting conditions. In the individual volunteer, the plasma 2-h drug level varied by a factor of 1.3 to 7.1, mean 3.5. The simultaneously measured skin minimal UVA sensitivity varied in the individual subjects by a factor of 1.3 to 3.8, mean 2.2. When all serum level and skin photosensitivity data of the study were tabulated, a negative correlation factor of 0.5758 was obtained, which is statistically highly significant (P〈0.001). It is concluded that both serum drug levels and degree of skin photosensitivity may fluctuate considerably in a single subject during repeated exposures to a standard oral 8-methoxsalen dose. Attempts should be made to minimize such undesirable variation by improvements of drug formulations and better consideration of the influence of dietary factors on drug absorption.
    Type of Medium: Electronic Resource
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  • 5
    Electronic Resource
    Electronic Resource
    Springer
    European archives of oto-rhino-laryngology and head & neck 231 (1981), S. 568-568 
    ISSN: 1434-4726
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary Epi-, meso-, and hypotympanotomy are the three most important characteristics of “Posterior Tympanotomy”. In special regard to the difficulties which have been mentioned by some authors recently, the technical details of epitympanotomy are demonstrated. A new way for microsurgery of the Eustachian tube is shown.
    Type of Medium: Electronic Resource
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