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R. Nukuhivensis Acts by Reinforcing Skin Barrier Function, Boosting Skin Immunity and by Inhibiting IL-22 Induced Keratinocyte Hyperproliferation

Scientific reports(2019)

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摘要
Rauvolfia nukuhivensis is a well-known plant used for its wide range of beneficial effects in Marquesas islands. It is made up of diverse indole alkaloids and is used as traditional medicine for skin application. The actual mechanism behind the virtue of this plant is still unknown. Hence, in this study we aimed at deciphering the impact of R . nukuhivensis on skin immune system in context of (1) homeostasis, (2) pathogen infection and (3) inflammation. Here we show that R . nukuhivensis enhances cellular metabolic activity and wound healing without inducing cellular stress or disturbing cellular homeostasis. It reinforces the epithelial barrier by up-regulating hBD-1. Nevertheless, in pathogenic stress, R . nukuhivensis acts by preparing the immune system to be reactive and effective directly. Indeed, it enhances the innate immune response by increasing pathogens sensors such as TLR5. Finally, R . nukuhivensis blocks IL-22 induced hyperproliferation via PTEN and Filaggrin up-regulation as well as BCL-2 downregulation. In conclusion, this study provides evidence on the several cutaneous application potentials of R . nukuhivensis such as boosting the immune response or in restoring the integrity of the epithelial barrier.
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关键词
Antimicrobial responses,Cell biology,Plant sciences,Science,Humanities and Social Sciences,multidisciplinary
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