Synthesis of prostaglandins by psoriatic skin
- 1 January 1977
- journal article
- research article
- Published by Springer Nature in Archives of Dermatological Research
- Vol. 259 (3) , 207-212
- https://doi.org/10.1007/bf00561448
Abstract
The biosynthesis of prostaglandins (PG) in biopsies from 9 patients with psoriasis was studied. The involved as well as the uninvolved psoriatic skin showed a statistically significant decrease of the ability to synthesize PG's. In PGE1-equivalents the concentration (mean ± S.E.M.) was 4.41 ± 0.48 ng/g wet weight in the psoriatic lesion, 5.41 ± 0.64 ng/g wet weight in uninvolved psoriatic skin in the presence of exogenous arachidonic acid in the incubation medium as compared with 9.02 ± 1.59 in normal human skin. When the skin was incubated without excess of exogenous precursor acid the activity formed was similarly significantly lower in psoriatic skin as compared with normal skin. A disturbed balance between E and F PG synthesis was not demonstrated, which might have accounted for the postulated altered intracellular ratio of cyclic AMP to cyclic GMP in psoriatic skin. Die Biosynthese der Prostaglandine in Gewebeentnahmen von 9 Psoriatikern wurde untersucht. Sowohl die veränderte als auch die unveränderte psoriatische Haut zeigt eine statistisch signifikante Verminderung der Synthese von PG. Die PG-Konzentrationen in PGE-Äquivalenten war 4,41 ± 0,48 ng/g Feuchtgewicht im psoriatischen Herd, 5,41 ± 0,64 ng/g Feuchtgewicht in nichtbefallener psoriatischer Haut im Gegenwert zugeführter Arachidonsäure in Inkubationsmedien. In normaler Haut betrugen die Werte 9,02 ± 1,59. Wenn der Haut ein Überschuß der zugeführten Arachidonsäure zugesetzt wurde, war die entsprechende PG-Bildung ebenfalss entsprechend signifikant geringer in der psoriatischen Haut im Vergleich mit der normalen Haut. Ein gestörtes Gleichgewicht zwischen E + F-Prostaglandinsynthese konnte nicht nachgewiesen werden, welches einem veränderten intracellulären Verhältnis von cyklischem AMP zu cyklischem GMP in psoriatischer Haut zugeschrieben werden könnte.Keywords
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