All-trans-retinoic acid induces interleukin-8 via the nuclear factor-κB and p38 mitogen-activated protein kinase pathways in normal human keratinocytes

Xiuju Dai, Kenshi Yamasaki, Yuji Shirakata, Koji Sayama, Koji Hashimoto

研究成果: Article査読

43 被引用数 (Scopus)

抄録

Retinoic acid derivatives have been used successfully for the treatment of various dermatoses, such as psoriasis; however, topical application of these compounds often elicits skin irritation. We hypothesized that this irritation was as a result of the local production of interleukin-8 (IL-8). To test this hypothesis, we investigated whether all-trans-retinoic acid (ATRA) induced IL-8 production in normal human keratinocytes. Stimulation with 10-7 M ATRA enhanced IL-8 mRNA expression and induced IL-8 production. We also studied the intracellular signaling mechanisms of ATRA-induced IL-8 production in keratinocytes. ATRA increased the expression of RelA (p65), RelB, nuclear factor (NF)-κB2 (p52), and NF-κB1 (p50), and elevated the DNA-binding activity of p65 and phosphorylation of inhibitor κB (IκB) α. Introduction of a dominant-negative mutant of IκBα completely abolished ATRA-induced IL-8 production, which indicates that this process is NF-κB-dependent. We also studied the role of the p38 mitogen-activated protein kinase (MAPK) pathway in this phenomenon. ATRA phosphorylated the p38 MAPK, and SB202180 inhibited ATRA-induced IL-8 production, which indicates that the p38 MAPK is also involved in ATRA-induced IL-8 production. In summary, ATRA induces IL-8 production in both NF-κB- and p38 MAPK-dependent manners in normal human keratinocytes.

本文言語English
ページ(範囲)1078-1085
ページ数8
ジャーナルJournal of Investigative Dermatology
123
6
DOI
出版ステータスPublished - 2004 12
外部発表はい

ASJC Scopus subject areas

  • 生化学
  • 分子生物学
  • 皮膚病学
  • 細胞生物学

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