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Updated: Feb 24, 2026

Pharmacologic Induction of Epidermal Melanin and Protection Against Sunburn in a Humanized Mouse Model
Published on: September 7, 2013
Myricetin protects keratinocyte damage induced by UV through IκB/NFκb signaling pathway
Jing Xie1,2, Yanyan Zheng2
1Shangdong Provincial Hospital for Skin Diseases, Shangdong University, Jinan, Shandong, China.
Objective:
The aim of this study was to evaluate the potential molecular mechanism of myricetin that protecting cells from photodamage.
Methods:
Myricetin had broadly chemopreventive effects and anti-inflammatory properties. The effect of myricetin was assessed on HaCaT cells. Cell viability assay was carried out. Reactive oxygen species (ROS) level was measured. The expression of pro-inflammatory factor COX2 was determined by real-time PCR and Western blot. The protein levels of p-IκBa and IκBa were determined by Western blot.
Results:
Myricetin attenuated UV-induced keratinocyte death in a dose-dependent manner as determined by cell viability assay. Pretreatment with myricetin also reduced the UV-induced ROS levels. Myricetin suppresses the upregulation of COX2 induced by UV in keratinocyte as demonstrated by real-time PCR and Western blot. Furthermore, signal transduction studies confirmed that myricetin attenuates the upregulation of COX2 induced by UV via suppression of IκB/NFκB pathways.
Conclusion:
These results showed that antioxidant property of myricetin can effectively attenuate UV-caused cell damage and suppress the expression of COX2 through the IκB/NFκB signaling pathways. Myricetin had potential protective effects on UV-induced skin cell damages, which might be used in cosmetic and pharmaceutical industries.
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