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  • 1
    Electronic Resource
    Electronic Resource
    Springer
    Archives of dermatological research 279 (1987), S. S63 
    ISSN: 1432-069X
    Keywords: Psoriasis ; Polymorphonuclear leukocytes ; Myeloperoxidase
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary The specific activity of myeloperoxidase (MPO), an enzyme located in the primary granules of polymorphonuclear leukocytes, was measured in patients with psoriasis vulgaris and compared with that in patients with atopic dermatitis and in healthy subjects. MPO catalyzes the oxidation of guaiacol into tetraguaiacol in the presence of H2O2. The activity was determined by photometric measurement of tetraguaiacol. The specific MPO activity showed no statistically significant difference between the healthy subjects and the patients with atopic dermatitis. In comparison to these two groups the specific MOP activity of the psoriatic patients showed a slight reduction which was, however, not statistically significant.
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Springer
    Archives of dermatological research 264 (1979), S. 169-177 
    ISSN: 1432-069X
    Keywords: Psoriasis ; Retinoid ; Epidermal cell proliferation ; Autoradiography ; Psoriasis ; Retinoid ; epidermale Proliferation ; Autoradiographie
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Zusammenfassung Bei 16 Psoriatikern mit generalisierter Psoriasis, die unter oralet Retinoid-Therapie standen (1 mg/kg Körpergewicht täglich), wurden 24h, 48h, 1 Woche und 3 Wochen nach Therapiebeginn autoradiographische Untersuchungen an der befallenen und nicht befallenen Epidermis durchgeführt. Während der ersten Behandlungswoche fanden sich keine signifikanten Veränderungen der zellkinetischen Parameter, doch nach 3wöchiger Therapie kam es zu einer Minderung des gesteigerten 3H-Markierungsindex und zu einer Verkürzung der verlängerten DNS-Synthesezeit; die mittlere Generationszeit blieb weiterhin unbeeinflußt. Diese Befunde zeigen, daß orale Retinoidgaben die veränderte Zellkinetik bie Psoriasis günstig beeinflussen, und zwar sowohl in befallener als auch in nicht befallener Epidermis. Die lange Latenzzeit spricht dafür, daß das Medikament nicht unmittelbar in den Zellcyclus eingreift. Damit wird der gute additive Effekt des Retinoids in der kombinierten klinischen Anwendung mit anderen antipsoriatischen Maßnahmen (Retinoid + Anthralin, Retinoid + PUVA, Retinoid + UVB) verständlich.
    Notes: Summary In 16 patients with generalized psoriasis treated with oral retinoid (Ro 10-9359; 1 mg/kg body weight/day) autoradiographic studies were performed before, and 24h, 48h, 1 week and 3 weeks after beginning of treatment on involved and non involved epidermis. During the first week no significant changes of all cellular parameters were found. However, after 3 weeks of continuing medication the increased 3H-thymidine labelling index was markedly lowered and the prolonged DNA synthesis time was shortened; whereas, the cell cycle time remained unaffected. The findings revealed that oral retinoid has a distinct influence on epidermal cell proliferation towards normalization in both involved and non involved epidermis in psoriasis. The time needed for this effect indicates that the drug does not directly interfere with the cell cycle. It seems reasonable, therefore, to combine oral retinoids as a basic adjuvant drug with other antipsoriatic techniques, such as retinoid + anthralin, retinoid + PUVA, retinoid + UVB.
    Type of Medium: Electronic Resource
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