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Cytoprotective effects of mild plasma-activated medium against oxidative stress in human skin fibroblasts
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Cytoprotective effects of mild plasma-activated medium against oxidative stress in human skin fibroblasts
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Cytoprotective effects of mild plasma-activated medium against oxidative stress in human skin fibroblasts
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Journal Article
Cytoprotective effects of mild plasma-activated medium against oxidative stress in human skin fibroblasts
2017
Overview
Non-thermal atmospheric pressure plasma (NTAPP) has recently been applied to living cells and tissues and has emerged as a novel technology for medical applications. NTAPP affects cells not only directly, but also indirectly with previously prepared plasma-activated medium (PAM). The objective of this study was to demonstrate the preconditioning effects of “mild PAM” which was prepared under relatively mild conditions, on fibroblasts against cellular injury generated by a high dose of hydrogen peroxide (H
2
O
2
). We observed the preconditioning effects of mild PAM containing approximately 50 μM H
2
O
2
. Hydrogen peroxide needs to be the main active species in mild PAM for it to exert preconditioning effects because the addition of catalase to mild PAM eliminated these effects. The nuclear translocation and recruitment of nuclear factor erythroid 2-related factor 2 (Nrf2) to antioxidant response elements (ARE) in
heme oxygenase 1 (HO-1)
promoters and the up-regulation of HO-1 were detected in fibroblasts treated with mild PAM. The addition of ZnPP, a HO-1-specific inhibitor, or the knockdown of Nrf2 completely abrogated the preconditioning effects. Our results demonstrate that mild PAM protects fibroblasts from oxidative stress by up-regulating HO-1, and the H
2
O
2
-induced activation of the Nrf2-ARE pathway needs to be involved in this reaction.
