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KMID : 0032220220340020125
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Annals of Dermatology
2022 Volume.34 No. 2 p.125 ~ p.131
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Astaxanthin Protects Ultraviolet B-Induced Oxidative Stress and Apoptosis in Human Keratinocytes via Intrinsic Apoptotic Pathway
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Chung Bom-Yee
Park Sang-Ho
Yun So-Yeon
Yu Dong-Soo
Lee Young-Bok
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Abstract
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Background: Ultraviolet radiation causes skin damage due to increased production of reactive oxygen species (ROS) and inflammatory intermediates and direct attack of DNA of skin cells. Astaxanthin is a reddish pigment that belongs to a group of chemicals called carotenoids and has protective effects as an antioxidant.
Objective: To determine the beneficial effects of astaxanthin on damaged human skin after exposure to ultraviolet radiation.
Methods: Normal human epidermal keratinocytes (NHEKs) were pre-treated with astaxanthin for 24 hours and exposed to ultraviolet B (UVB) irradiation. After 24 hours, the Cell Counting Kit-8 (CCK-8) assay measured cell viability, ROS assay and flow cytometry analysis assessed apoptosis, and western blotting was performed to determine expression of apoptosis-related proteins.
Results: Astaxanthin significantly inhibited UVB-induced NHEKs cytotoxicity. Pretreatment of NHEKs with astaxanthin reduced UVB-induced ROS production. Astaxanthin caused significant inhibition of UVB-induced apoptosis, as evidenced by flow cytometry analysis and western blotting.
Conclusion: These results suggest that astaxanthine has a beneficial effect of reducing damage caused by UVB by effectively inhibiting cell death and reducing ROS production in keratinocytes.
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KEYWORD
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Apoptosis, Astaxanthine, Keratinocytes, Reactive oxygen species, Ultraviolet rays
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