Suppression of skin inflammation in keratinocytes and acute/chronic disease models by caffeic acid phenethyl ester

Kyung Min Lim, Seung Jin Bae, Jung Eun Koo, Eun Sun Kim, Ok Nam Bae, Joo Young Lee

Research output: Contribution to journalArticlepeer-review

21 Scopus citations

Abstract

Skin inflammation plays a central role in the pathophysiology and symptoms of diverse chronic skin diseases including atopic dermatitis (AD). In this study, we examined if caffeic acid phenethyl ester (CAPE), a skin-permeable bioactive compound from propolis, was protective against skin inflammation using in vitro cell system and in vivo animal disease models. CAPE suppressed TNF-α-induced NF-κB activation and expression of inflammatory cytokines in human keratinocytes (HaCaT). The potency and efficacy of CAPE were superior to those of a non-phenethyl derivative, caffeic acid. Consistently, topical treatment of CAPE (0.5 %) attenuated 12-O-tetradecanoylphorbol-13-acetate(TPA)-induced skin inflammation on mouse ear as CAPE reduced ear swelling and histologic inflammation scores. CAPE suppressed increased expression of pro-inflammatory molecules such as TNF-α, cyclooxygenase-2 and inducible NO synthase in TPA-stimulated skin. TPA-induced phosphorylation of IκB and ERK was blocked by CAPE suggesting that protective effects of CAPE on skin inflammation is attributed to inhibition of NF-κB activation. Most importantly, in an oxazolone-induced chronic dermatitis model, topical application of CAPE (0.5 and 1 %) was effective in alleviating AD-like symptoms such as increases of trans-epidermal water loss, skin thickening and serum IgE as well as histologic inflammation assessment. Collectively, our results propose CAPE as a promising candidate for a novel topical drug for skin inflammatory diseases.

Original languageEnglish
Pages (from-to)219-227
Number of pages9
JournalArchives of Dermatological Research
Volume307
Issue number3
DOIs
StatePublished - 17 Mar 2015

Keywords

  • Atopic dermatitis
  • Caffeic acid phenethyl ester (CAPE)
  • Nuclear factor κB (NF-κB)
  • Skin inflammation
  • TPA-induced ear edema

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