Molecular Hydrogen Protects Human Melanocytes from Oxidative Stress by Activating Nrf2 Signaling

Wei Fang, Luyan Tang, Guizhen Wang, Jinran Lin, Wanqing Liao, Weihua Pan, Jinhua Xu

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DOI: 10.1016/j.jid.2019.03.1165 DOI is the universal ID for this study.

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Oxidative stress is proven to be critical for the initiation and progression of vitiligo. Molecular hydrogen (H2) possesses potent antioxidant activity and has been shown to protect against various oxidative stress-related diseases. In this study, we first investigated the effects and mechanisms of H2 in human melanocytes damaged by hydrogen peroxide. We initially found that H2 reduced intracellular ROS accumulation and malondialdehyde levels in both vitiligo specimens and hydrogen peroxide-treated melanocytes in vitro in a concentration- and time-dependent manner, concomitant with the enhancement of antioxidant enzyme activity. Correspondingly, H2 reversed hydrogen peroxide-induced apoptosis and dysfunction in both normal and vitiligo melanocytes. H2 protected mitochondrial morphology and function in melanocytes under stress and promoted the activation of Nrf2 signaling, whereas Nrf2 deficiency abolished the protective effect of H2 against hydrogen peroxide-induced oxidative damage. Furthermore, H2 positively modulated β-catenin in hydrogen peroxide-treated melanocytes, and the β-catenin pathway was implicated in H2-induced Nrf2 activation. Collectively, our results indicate that H2 could be a promising therapeutic agent for vitiligo treatment via attenuating oxidative damage, and its beneficial effect in human melanocytes might involve Wnt/β-catenin-mediated activation of Nrf2 signaling.

Publish Year 2020
Country China
Rank Positive
Journal Journal of Investigative Dermatology
Primary Topic Skin
Secondary Topic Vitiligo
Model Cell Culture
Tertiary Topic Oxidative Stress
Vehicle Gas
pH N/A
Application Ventilation