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Propolis Flavonoid Protects Against UV-Induced Skin Damage

Propolis, the power house of protection, now protects against the sun...


"Chrysin Protects Epidermal Keratinocytes from UVA- and UVB-Induced Damage
J Agric Food Chem, 2011 Jun 24


Journal of Agricultural and Food ChemistryChrysin (5,7-dihydroxyflavone), a natural flavonoid occurring in various plants and foods such as propolis and honey, reportedly opposes inflammation and carcinogenesis, but has rarely been applied in skin care.


This study, therefore, aimed to explore the roles of chrysin in protection against UV-induced damage in HaCaT keratinocytes.


Results showed that chrysin can attenuate apoptosis, reactive oxygen species (ROS) production, and cyclooxygenase 2 (COX-2) expression induced by UVB and UVA. Chrysin predominantly reversed the downregulation of aquaporin 3(AQP-3) by UVB. It predominantly reversed JNK activation and also mildly inhibited p38 activation triggered by UVA and UVB. Animal studies revealed that chrysin's topical application demonstrated efficient percutaneous absorption and no skin irritation.


Overall, results demonstrated significant benefits of chrysin on the protection of keratinocytes against UVA- and UVB-induced injuries, and suggested its potential use in skin photoprotection."
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