Anti-Inflammatory Action of Keratinocyte-Derived Vaspin: Relevance for the Pathogenesis of Psoriasis

The American Journal of Pathology
Anja SaalbachJan C Simon

Abstract

Impaired cross talk between keratinocytes (KCs) and immune cells is believed to contribute to the pathogenesis of chronic inflammatory skin diseases, such as psoriasis. We have previously identified KCs as a rich source of the serpin protease inhibitor vaspin (serpinA12), originally described as an adipokine in adipose tissue. Herein, we studied whether dysregulated vaspin expression in KCs contributes to the pathogenesis of psoriasis. We found vaspin expression to be closely associated to epidermal differentiation, with low levels in proliferating KCs and high levels in differentiated cells. Consistently, in human psoriasis and in a mouse model of a psoriasis-like skin inflammation, epidermal vaspin expression was significantly down-regulated. Down-regulation of vaspin in KCs resulted in decreased expression of differentiation-associated genes and up-regulation of interferon-inducible and inflammation-associated psoriasis signature genes. Vaspin was also shown to modulate the communication between KCs and inflammatory cells under co-culture conditions. A decrease in vaspin expression in KCs stimulated the secretion of tumor necrosis factor-α, IL-1β, IL-6, IL-8, and monocyte chemoattractant protein-1 by co-cultured dendritic ce...Continue Reading

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Citations

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