Preprint / Version 1

Anti-Psoriatic Activity of Black, Green and White Tea Extracts from Southeastern China

Authors

Keywords:

psoriasis, tea, inflammation, ethanol extract, component analysis

Abstract

Psoriasis is a common chronic inflammatory disease, but most of its current treatments come with a high risk of side effects. As one of the world’s top three beverages, tea has a traditional history of being used as a treatment for skin conditions due to its high safety profile, anti-inflammatory and other properties. In this study, we investigated the anti-psoriasis effects of ethanol extracts of black tea, green tea and white tea from southeastern China. The compositions of the tea extracts (TEs) were first determined by UPLC-Q-Exactive-Orbitrap MS and then genetic analysis, antibacterial, anti-inflammatory, and immunocompetence assays were performed. Imiquimod was used to establish a mouse model of psoriasis-like dermatitis and treating with the extracts to examine their efficacy. A total of 88 chemical components, mainly phenols and organic acids, were identified from the TEs. These TEs ameliorated skin damage and they all reduced the expression of cytokines IL-17 and TNF-α. By analyzing the genes, TEs may affect the inflammatory signaling pathway by regulating the metabolic changes. In addition, TEs can significantly scavenge ROS, NO, and inhibit cellular inflammation. In conclusion, this study examined the inhibitory effects of three TEs on psoriasis and their potential as nutritional supplements for the treatment of skin inflammation. Keywords: psoriasis, tea, inflammation, ethanol extract, component analysis

Author Biographies

Lanyue Zhang, Guangdong Provincial Key Laboratory of Plant Resources Biorefinery, School of Biomedical and Pharmaceutical Sciences, Guangdong University of Technology, Guangzhou 510006, China

Conceptualization, Methodology, Writing – original draft

Zeting Huang, Guangzhou Zhongzhuang Meiye Cosmetics Co., Ltd., Guangzhou 510006, China; [email protected] (Z.H.); [email protected] (J.X.); [email protected] (L.Y.)

Data curation, Writing – original draft

Jie Xuan, Guangzhou Zhongzhuang Meiye Cosmetics Co., Ltd., Guangzhou 510006, China; [email protected] (Z.H.); [email protected] (J.X.); [email protected] (L.Y.)

Software, Writing – original draft

Lu Yang, Guangzhou Zhongzhuang Meiye Cosmetics Co., Ltd., Guangzhou 510006, China; [email protected] (Z.H.); [email protected] (J.X.); [email protected] (L.Y.)

Investigation, Writing – review & editing

Tiantian Zhao, Sericulture and Agri-Food Research Institute, Guangdong Academy of Agricultural Sciences, Key Laboratory of Functional Foods, Ministry of Agriculture and Rural Affairs, Guangdong Key Laboratory of Agricultural Products Processing, Guangzhou 510610, China; [email protected]

Conceptualization, Writing – review & editing, Project administration

Weihua Peng, Guangzhou Zhongzhuang Meiye Cosmetics Co., Ltd., Guangzhou 510006, China; [email protected] (Z.H.); [email protected] (J.X.); [email protected] (L.Y.)

Writing – review & editing, Supervision, Project administration, Funding acquisition

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