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- W2022352760 abstract "Background Cathelicidin antimicrobial peptide LL-37 has the capacity to kill a wide range of microbes and to modify host immunity. Recently, our group observed that the activation of keratinocytes by LL-37 and DNA greatly increases interferon (IFN)-β through Toll-like receptor (TLR)9. However, the effect of LL-37 on the induction of IFN-β through TLR3, a sensor of double-stranded (ds) RNA, in keratinocytes is not well known. Objectives To investigate whether LL-37 could affect TLR3 signalling and antiviral activity in normal human epidermal keratinocytes (NHEKs). Methods We investigated the production of IFN-β in NHEKs stimulated with a TLR3 ligand, poly (I:C), in the presence of LL-37. To examine the effect of LL-37 and poly (I:C) on antiviral activity, a virus plaque assay using herpes simplex (HS) virus type-1 was carried out. The uptake of poly (I:C) conjugated with fluorescein isothiocyanate (FITC) into the keratinocytes was observed in the presence of LL-37. Immunostaining for TLR3 and LL-37 was performed using skin samples from HS. Results LL-37 and poly (I:C) synergistically induced the expression of IFN-β in NHEKs. Furthermore, co-stimulation with LL-37 and poly (I:C) significantly decreased the viral plaque numbers compared with poly (I:C) or LL-37 alone. LL-37 enhanced the uptake of FITC-conjugated poly (I:C) into cells. Immunohistochemical analysis demonstrated that the expression of TLR3 and LL-37 is upregulated in HS lesions. Conclusions Our findings suggest that LL-37 augments the antiviral activity induced by dsRNA in keratinocytes, which may contribute to the innate immune response to cutaneous viral infections such as HS." @default.
- W2022352760 created "2016-06-24" @default.
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- W2022352760 date "2014-08-05" @default.
- W2022352760 modified "2023-10-14" @default.
- W2022352760 title "Cathelicidin antimicrobial peptide <scp>LL</scp> ‐37 augments interferon‐β expression and antiviral activity induced by double‐stranded <scp>RNA</scp> in keratinocytes" @default.
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- W2022352760 doi "https://doi.org/10.1111/bjd.12942" @default.
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