Ultraviolet light inhibition of oriented, fibrin formation in psoriasis

Radially‐oriented fibrin crystallization was induced by incubation of blood from psoriatic patients with killed Pseudomonas aeruginosa.. The phenomenon was inhibited by irradiation of the buffy coat in plasma with UV‐B. It was not inhibited by UV‐A unless trioxsalen had been added. Addition of UV‐B‐irradiated plasma to non‐irradiated buffy coat also inhibits the fibrin formation.

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