Summary
In one patient treated by peritoneal dialysis for psoriasis the skin lesions cleared completely. In two persons hemodialysis gave unsatisfactory results.
In treated and another three untreated patients cellular immunity was evidently suppressed. This phenomenon is similar to the immunologic changes in persons with uremia.
Solutes in middle molecular weight range (SMMWR) suppress cellular immunity. These compounds were therefore investigated in psoriatics. The level of SMMWR was lower before than after each dialysis, although their concentration increased slightly during the dialytic treatment.
This suggests that solutes in middle molecular weight are fixed in the epidermis and/or in the walls of the skin capillaries and that dialysis liberates them from these places.
Peritoneal dialysis seems to be a more effective method of treating psoriasis than hemodialysis. Solutes in middle molecular weight range might play an important role in the pathomechanisms of this multifactorial disease.
Zusammenfassung
Bei einem Patienten, der mit der peritonealen Dialyse behandelt wurde, heilten die psoriatischen Herde völlig ab. Bei zwei weiteren Patienten waren die Resultate nicht befriedigend. Bei den behandelten und den drei nicht behandelten Patienten war die celluläre Immunität augenscheinlich unterdrückt. Dieses Phänomen ist mit den immunologischen Veränderungen bei Personen mit einer Urämie zu vergleichen. Organische Verbindungen von mittlerem Molekulargewicht, wozu auch die Gruppe der urämischen Toxine gehört, unterdrücken die celluläre Immunität. Deshalb wurden diese Verbindungen bei Psoriatikern untersucht. Der Spiegel der SMMWR war vor jeder Dialyse tiefer als danach, obwohl deren Konzentration während der Dialysebehandlung leicht anstieg. Dies läßt vermuten, daß diese SMMWR-Substanzen in der Epidermis fixiert sind oder im Bereiche der Capillaren vorliegen und dementsprechend während der Dialyse von diesen Orten freigesetzt werden.
Die Peritonealdialyse scheint mehr eine wirksamere Behandlungsmethode der Psoriasis zu sein als die Hämodialyse. SMMWR-Substanzen können eine wichtige Rolle in dem Pathomechanismus der multifaktoriellen Erkrankung darstellen.
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Hanicki, Z., Cichocki, T., Klein, A. et al. Dialysis for psoriasis —Preliminary remarks concerning mode of action. Arch Dermatol Res 271, 401–405 (1981). https://doi.org/10.1007/BF00406684
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DOI: https://doi.org/10.1007/BF00406684