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The phosphatase regulator NIPP1 restrains chemokine-driven skin inflammation
Journal of Investigative Dermatology ( IF 6.290 ) Pub Date : 2020-01-21 , DOI: 10.1016/j.jid.2020.01.008
Iris Verbinnen; Marloes Jonkhout; Kifayathullah Liakath-Ali; Kathelijne Szekér; Mónica Ferreira; Shannah Boens; Raphael Rouget; Margareta Nikolic; Susan Schlenner; Aleyde Van Eynde; Mathieu Bollen

NIPP1 is a ubiquitously expressed nuclear protein that regulates functions of protein Ser/Thr phosphatase-1 in cell proliferation and lineage specification. The role of NIPP1 in tissue homeostasis is not fully understood. Here we show that the selective deletion of NIPP1 in mouse epidermis resulted in epidermal hyperproliferation, a reduced adherence of basal keratinocytes and a gradual decrease in the stemness of hair follicle stem cells, culminating in hair loss. This complex phenotype was associated with chronic sterile skin inflammation and could be partially rescued by dexamethasone treatment. NIPP1-deficient keratinocytes massively expressed pro-inflammatory chemokines and immunomodulatory proteins in a cell-autonomous manner. Chemokines subsequently induced the recruitment and activation of immune cells, in particular conventional dendritic cells and Langerhans cells, accounting for the chronic inflammation phenotype. Our data identify NIPP1 as a key regulator of epidermal homeostasis and as a potential target for the treatment of inflammatory skin diseases.
更新日期:2020-01-21

 

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