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. 1984 Oct;18(4):523-7.
doi: 10.1111/j.1365-2125.1984.tb02499.x.

The effect of etretinate on the cyclo-oxygenase and lipoxygenase products of arachidonic acid metabolism in psoriatic skin

E Wong, R M Barr, S D Brain, M W Greaves, L A Olins, A I Mallet

The effect of etretinate on the cyclo-oxygenase and lipoxygenase products of arachidonic acid metabolism in psoriatic skin

E Wong et al. Br J Clin Pharmacol. 1984 Oct.

Abstract

Eight psoriatic patients were treated with etretinate (50 mg daily) for 6 weeks. Skin chamber exudates from involved and uninvolved skin were assayed for arachidonic acid, 12-HETE, PGE2 and for neutrophil chemokinetic activity co-chromatographing with leukotriene B4, before and at weekly intervals during therapy. Pre-treatment concentrations of arachidonic acid, 12-HETE and leukotriene B4-like chemokinetic activity but not of PGE2 were elevated in involved skin when compared to uninvolved skin. The concentrations of arachidonic acid and 12-HETE declined during therapy but changes in PGE2 were minimal. LTB4-like activity was detectable in involved skin both before and after etretinate treatment. Clinically, scaling and infiltration improved but erythema was still evident.

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