Abstract：
AIMS:Keratinocytes are the predominant cells in the epidermis, exerting their primary role of physical barrier through sophisticated differentiation process. In addition, keratinocytes contribute to the activation of innate immunity, providing the surveillant role against external pathogens. It has been known that chronic skin inflammatory disease such as psoriasis can be provoked by viral pathogens including double-stranded RNA. In this study, we demonstrated that rosmarinic acid (RA) has an inhibitory potential on inflammatory reaction induced by double-stranded RNA mimic poly(I:C) in epidermal keratinocytes. MAIN METHODS:We cultured human epidermal keratinocytes and induced inflammatory reaction by poly(I:C) treatment. The effect of RA on inflammatory reaction of keratinocytes was determined by RT-PCR and Western blot. KEY FINDINGS:RA significantly inhibited poly(I:C)-induced expression of inflammatory cytokines including IL-1β, IL-6, IL-8, CCL20, and TNF-α, and downregulated NF-κB signaling pathway in human keratinocytes. In addition, RA significantly inhibited poly(I:C)-induced inflammasome activation, in terms of secretion of active form of IL-1β and caspase-1. Furthermore, RA markedly inhibited poly(I:C)-induced NLRP3 and ASC expression. SIGNIFICANCE:These results indicate that RA can inhibit poly(I:C)-induced inflammatory reaction of keratinocytes, and suggest that it may be a potential candidate for the treatment of psoriasis.
journal_name
Life Scijournal_title
Life sciencesauthors
Zhou MW,Jiang RH,Kim KD,Lee JH,Kim CD,Yin WT,Lee JHdoi
10.1016/j.lfs.2016.05.023subject
Has Abstractpub_date
2016-06-15 00:00:00pages
189-94eissn
0024-3205issn
1879-0631pii
S0024-3205(16)30304-6journal_volume
155pub_type
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