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  • 1
    Electronic Resource
    Electronic Resource
    Springer
    Archives of dermatological research 271 (1981), S. 29-40 
    ISSN: 1432-069X
    Keywords: Psoriasis ; Ro-109359 ; ConA ; PWM ; MTX ; Cultivated lymphocytes ; Psoriasis ; Ro-109359 ; ConA ; PWM ; MTX ; Lymphozytenkulturen
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Zusammenfassung Die hier durchgeführten Untersuchungen erfolgten an mononucleären Zellen von Patienten, die an einem frischen Schub einer Psoriasis vulgaris bzw. einer psoriatischen Erythrodermie litten. Die peripheren mononucleären Zellen wurden mit Hilfe einer Dichtegradientenzentrifugation isoliert und anschließend einer 6-Tage-Kultur mit Pokeweed-Mitogen (PWM), Concanavalin A (ConA), Methotrexat (MTX) und dem Retinoidabkömmling Ro-109359 inkubiert. Mit Hilfe des Plague-forming Assay nach Cunningham und Szenberg wurden die IgG-produzierenden Zellen quantifiziert. Als Zielantigene wurden Schafserythrocyten (SRBC) und Rindererythrocyten (BRBC) verwendet. Die Plaque-bildenden Zellen (PFC) von Psoriatikern konnten in der mit Mitogen stimulierten Kultur durch ConA, das normalerweise die Suppressorzellen stimuliert, nur um etwa 50% supprimiert werden, während die Zellen von gesunden Kontrollpersonen annähernd zu 100% supprimiert wurden. Ro-109359 wirkte stark reduzierend auf die IgG-PFC, während MTX sowohl IgG-wie IgM-produzierende Zellen verringerte. Diese hier mitgeteilten Ergebnisse legen es nahe, daß eine polyklonale Aktivierung von antikörperproduzierenden Zellen bei der Psoriasis vulgaris während der aktiven Phase besteht. Diese Antikörpersekretion wird durch Ro-109359 gehemmt. Mögliche Störungen der Immunantwort bei Psoriasiskranken, die wahrscheinlich auf einer verminderten Funktion der T-Suppressor-Zellen beruht, werden diskutiert.
    Notes: Summary Isolated peripheral mononuclear cells of psoriasis patients with different disease characteristics, e. g. head-localised, quiescent guttata, confluent active widespread and erythrodermic, were cultured in a modified Mishell-Dutton system. Using the plaque-forming cell (PFC) assay, single cell antibody formation was studied, and class distribution monitored, adding pokeweed mitogen (PWM), concanavalin A (ConA), methotrexate (MTX) or Ro-109359/31, as well as autologous sera to the culture. PFC-estimation vs. sheep red blood cells (SRBC) and burro red blood cells (BRBC) revealed a distinct suppression of primarily IgG-PFC in some of the PWM-treated patients' cultures; ConA maximally reduced PFC by only 50%, compared to 100% for normal immune cells. Ro-109359/31 reduced mainly IgG-PFC in the co-cultures with PWM or autologous sera. MTX resulted in a reduction of IgG-PFC and IgM-PFC equally. The results were compared with cultured immune cells from normal individuals. The two antigenically different indicators, the partial abolition of ConA induced suppression, broad-based immunoglobulin elevation in the sera, and the mainly IgG-formation hint at the role of polyclonal B-cell activation in the perpetuation of psoriasis, which can be specifically reduced by Ro-109359/31. Suppressor cell dysfunctions remain to be discussed.
    Type of Medium: Electronic Resource
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  • 2
    ISSN: 1573-7284
    Keywords: Tetracycline resistance ; Plasmid ; N. gonorrhoeae ; U. urealyticum
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract A young man who acquired gonococcal urethritis in the Far East was not cured by repeated i.v. treatment with a broad-spectrum penicillin. Cultures of pre- and post-treatment urethral specimens grew tetracycline-resistant penicillinase-producing Neisseria gonorrhoeae (PPNG) and tetracycline-resistant Ureaplasma urealyticum. The patient was successfully treated with erythromycin, to which both isolates were sensitive. The strain of N. gonorrhoeae carried a novel plasmid of 10.5 Md molecular mass in addition to plasmids previously observed in this organism. The strain of U. urealyticum carried two distinct plasmids, one with mass 4.9 Md and the other one with mass 8.1 Md. This report demonstrates that ureaplasmas can contain plasmids and raises the question if tetracycline resistance is controlled by plasmids or by the chromosome.
    Type of Medium: Electronic Resource
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  • 3
    Electronic Resource
    Electronic Resource
    Springer
    Graefe's archive for clinical and experimental ophthalmology 220 (1983), S. 268-272 
    ISSN: 1435-702X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract The effects of retinoid Ro 10-9359 on normal albino rabbit eyes and antigen-induced intra-ocular inflammations were investigated. The distribution pattern of intravenously applied 3H — Ro 10-9359 correlated well with the sites of pharmacological action. Whereas immunologically naive rabbits showed a uveal uptake of 0.164 ng/g wet wt. tissue when 100 μg of Ro 10-9359 was administered intravenously, accumulation may amount up to 17.46 ng/g in secondary ocular immune responses. Ro 10-9359 accumulated markedly during secondary stimulation in the uvea, preauricular lymph nodes and the spleen. The chemotactic peptide NForm-Leu-Leu-Phe used to incite a hypopyon attracted Ro 10-9359 into the anterior chamber in vivo. This study indicates that the aromatic retinoid Ro 10-9359 is able to alter certain immune responses and may be involved in intercellular communication during secondary immune responses in the albino rabbit eye.
    Type of Medium: Electronic Resource
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  • 4
    Electronic Resource
    Electronic Resource
    Springer
    Graefe's archive for clinical and experimental ophthalmology 218 (1982), S. 301-303 
    ISSN: 1435-702X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Zusammenfassung Diese Fallbeschreibung dokumentiert eine klinisch signifikante, mit Ulcera marginalia einhergehende Infektion der Cornea des linken Auges bei einem 27 Jahre alten Patienten. Das Krankheitsbild trat akut auf, begleitet von einer Beeinträchtigung des Allgemeinbefindens und Serokonversion bezüglich der Chlamydien-KBR. Das diagnostische und therapeutische Vorgehen und die Aetiologie der Infektion werden diskutiert.
    Notes: Abstract This case report describes a clinically significant infection of the left eye caused byChlamydia trachomatis, which showed corneal lesions. The acute clinical picture was combined with a general decline of health and an increase of the antibody titer against Chlamydia. The diagnostical and therapeutical procedures as well as the aetiology of this infection are discussed.
    Type of Medium: Electronic Resource
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