[Latest aspects in psoriasis pathogenesis].

During recent years the understanding of psoriasis pathogenesis has changed essentially. Psoriasis is now considered as a T cell mediated inflammation of the skin. Genetic predisposition and microbial environment cooperate in the induction of an antigen-specific T cell mediated immune response which may persist lifelong. The phenotype of the psoriatic inflammation is determined by the particular functional differentiation of the pathogenic T cells. The progress in understanding the pathogenesis of psoriasis has identified T cells and T cell-derived cytokines as targets for causal treatment approaches that in the near future will change psoriasis therapy considerably.