Zusammenfassung
Die Psoriasis ist eine genetisch determinierte, immunologisch mediierte, chronische Erkrankung der Haut. Im Mittelpunkt des Entzündungsgeschehens stehen T-Lymphozyten, die durch Produktion und Ausschüttung verschiedener proinflammatorischer Zytokine den Entzündungsvorgang initiieren und unterhalten und dabei Keratinozyten zur überschießenden Proliferation anregen. Die stimulierten Keratinozyten treten in eine beschleunigte, aber unvollständige Differenzierung. Dabei exprimieren sie Rezeptoren, die sie für Entzündungssignale empfindlich machen und setzen zusätzlich selbst Entzündungsmediatoren frei. So wird die psoriatische Entzündung durch eine gegenseitige Stimulation zwischen Leukozyten und Keratinozyten unterhalten. Dieser komplexe Ablauf auto- und parakriner Stimulationsmechanismen kann durch Immunsuppressiva recht gut unspezifisch unterdrückt werden, insbesondere am T-Zell-Schenkel. Im Folgenden werden Wirkmechanismen, Effizienz und Nebenwirkungen wichtiger Immunsuppressiva wie Methotrexat, Ciclosporin A, Tacrolimus, Pimecrolimus dargestellt und der Stellenwert der Therapie mit Mycophenolat Mofetil und Fumarsäureester diskutiert.
Abstract
Accumulative evidence suggests that psoriasis may be a genetically determined immunologenic inflammatory disorder based on an ongoing autoreactive Th-1 response. Various cytokines (e.g. IL-2, interferon-gamma etc.) are released and exert proliferative signals on to keratinocytes, which start proliferation that finally results in an incomplete differentiation. During this pathobiological process keratinocytes themselves express receptors that make them sensitive for growth inducing stimulation and also start the production of a set of cytokines that contribute to and maintain inflammation. Immunosuppressive agents, mostly by affecting T-cells may interfere with or even disrupt by rather unspecific mechanisms, this complex process of mutual stimulation of leucocytes and keratinocytes. In this manuscript we show mode of action, efficacy and side effects of Methotrexate, Ciclosporin A, Tacrolimus and Pimecrolimus, and discuss therapeutic options with mycophenolate mofetil and fumaric acid esters.
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Ortiz-Urda, S., Rappersberger, K. Neue Immunsuppressiva in der Therapie der Psoriasis. Hautarzt 54, 230–236 (2003). https://doi.org/10.1007/s00105-003-0499-0
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DOI: https://doi.org/10.1007/s00105-003-0499-0