Overexpression of Psoriasin (S100A7) Contributes to Dysregulated Differentiation in Psoriasis.

Abstract:

:Psoriasin, which is highly expressed in psoriasis, is encoded by a gene located within the epidermal differentiation complex. The aim of this study was to investigate the effect of endogenous psoriasin on disturbed keratinocyte differentiation in psoriasis. Immunohistochemical staining revealed a gradient of psoriasin expression in the psoriatic epidermis with highest expression in the suprabasal, differentiated layers. Induction of keratinocyte differentiation caused concurrent expression of psoriasin and the differentiation marker involucrin. The differentiation-induced psoriasin expression was found to be mediated by the protein kinase C pathway. The downregulation of psoriasin expression by small interfering RNA revealed that psoriasin mediates the expression of involucrin, desmoglein 1, transglutaminase 1 and CD24 in normal differentiation. The lentivirus-mediated overexpression of psoriasin, mimicking the psoriatic milieu, gave rise to an altered regulation of differentiation genes and an expression pattern reminiscent of that in psoriatic epidermis. These findings suggest that psoriasin contributes to the dysregulated differentiation process in the psoriasis epidermis.

journal_name

Acta Derm Venereol

authors

Ekman AK,Vegfors J,Eding CB,Enerbäck C

doi

10.2340/00015555-2596

subject

Has Abstract

pub_date

2017-04-06 00:00:00

pages

441-448

issue

4

eissn

0001-5555

issn

1651-2057

journal_volume

97

pub_type

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