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JOURNAL ARTICLE
RESEARCH SUPPORT, NON-U.S. GOV'T
IL-12, IL-23, and IL-27 enhance human beta-defensin-2 production in human keratinocytes.
European Journal of Immunology 2008 May
IL-12, IL-23, and IL-27, which are produced by APC, modulate innate and adaptive immunities. Human beta-defensin-2 (hBD-2) produced by epidermal keratinocytes promotes cutaneous antimicrobial defense and inflammation. We examined the in vitro effects of IL-12, IL-23, and IL-27 on hBD-2 production in human keratinocytes. IL-12, IL-23, and IL-27 enhanced IL-1beta-induced hBD-2 secretion and mRNA expression in keratinocytes. The stimulatory effects of IL-12, IL-23, and IL-27 were suppressed by antisense oligonucleotides against NF-kappaB p50 and p65. In addition, the effects of IL-12 and IL-27 were suppressed by antisense STAT3 and STAT1, respectively. All the three IL enhanced the basal and IL-1beta-induced transcriptional activities of NF-kappaB, while IL-12 and IL-27 enhanced STAT3 and STAT1 activities, respectively. Further, IL-12, IL-23, and IL-27 promoted basal and IL-1beta-induced phosphorylation of IkappaBalpha. IL-12 and IL-23 tyrosine phosphorylated STAT3 and STAT1, respectively; IL-12, IL-23, and IL-27 tyrosine phosphorylated JAK2 and tyrosine kinase-2; and IL-27 tyrosine phosphorylated JAK1. These results suggest that IL-12, IL-23, and IL-27 may enhance IL-1beta-induced hBD-2 production in keratinocytes by activating NF-kappaB. STAT3 and STAT1 are involved in the effects of IL-12 and IL-27, respectively. Thus, IL-12, IL-23, and IL-27 may promote cutaneous antimicrobial defense and inflammation via hBD-2.
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