Biological therapy induces expression changes in Notch pathway in psoriasis

Evangelia Skarmoutsou, Chiara Trovato, Mariagrazia Granata, Giulio A Rossi, Ambra Mosca, Valentina Longo, Pietro Gangemi, Maurizio Pettinato, Fabio D'Amico, Maria Clorinda Mazzarino
Archives of Dermatological Research 2015, 307 (10): 863-73
Psoriasis is a chronic inflammatory skin disease, characterized by hyperproliferation of keratinocytes and by skin infiltration of activated T cells. To date, the pathophysiology of psoriasis has not yet been fully elucidated. The Notch pathway plays a determinant role in cell fate determination, proliferation, differentiation, immune cell development and function. Many biological agents, used in the treatment of psoriasis, include TFN-α inhibitors, such as etanercept, adalimumab, and anti IL-12/IL-23 p40 antibody, such as ustekinumab. This study aimed to determine mRNA expression levels by real-time RT-PCR, and protein expression levels, analysed by Western blot and immunohistochemistry, of some components of the Notch pathway, such as NOTCH1, NOTCH2, JAGGED1, and HES1 after biological treatments in psoriatic patients. mRNA and protein levels of NOTCH1, NOTCH2, JAGGED1 and HES1 were upregulated in skin samples from untreated psoriatic patients compared with normal controls. Biological therapy showed to downregulate differently the protein expression levels of the molecules under study. Our study suggests that Notch pathway components might be a potential therapeutic target against psoriasis.

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