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J Eur Acad Dermatol Venereol. 1998 Mar;10(2):147-51.

Plasma concentrations of IFN-gamma and TNF-alpha in psoriatic patients before and after local treatment with dithranol ointment.

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  • 1Department of Dermatology, Lublin, Poland.


IFN-gamma and TNF-alpha plasma levels were measured before and after local treatment in 27 patients. Twenty healthy subjects served as controls. Plasma concentrations of IFN-gamma and TNF-alpha were significantly higher before treatment (178.7 +/- 11.9 pg/ml and 31.9 +/- 11.6 pg/ml, respectively) compared to the control group (139.6 +/- 7.86 pg/ml and 17.1 +/- 7.7 pg/ml, respectively). After treatment IFN-gamma levels were significantly decreased (151.3 +/- 8.3 pg/ml) toward the control group values and TNF-alpha levels were observed even lower than in the controls (11.48 +/- 6.8 pg/ml). No correlations were found between age, duration of psoriasis and plasma levels of cytokines. However, IFN-gamma levels were related, although not significantly, to disease severity (evidenced by the PASI score). The data support the important proinflammatory role of IFN-gamma and TNF-alpha in the clinical manifestation of psoriasis.

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