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KMID : 1035420230110020169
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Journal of The Korean Society of Integrative Medicine
2023 Volume.11 No. 2 p.169 ~ p.179
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Inhibition of Human Periodontal Stem Cell Death Following the Antioxidant Action of Celecoxib
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Lee Kyung-Hee
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Abstract
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Purpose : Although human periodontal ligament stem cells (hPDLSCs) are a supportive factor for tissue engineering, oxidative stress during cell culture and transplantation has been shown to affect stem cell viability and mortality, leading to failed regeneration. The aim of this study was to evaluate the antioxidant and protective effects against cell damage of celecoxib, a selective cyclooxygenase-2 (COX-2) inhibitor, and the antioxidant signal of hPDLSCs in H2O2-induced oxidative stress.
Methods : To induce oxidative stress in cultured hPDLSCs, H2O2 was used as an exogenous reactive oxygen species (ROS). Dose-dependent celecoxib (.1, 1, 10, or 100 μM) was administered after H2O2 treatment. WST-1 assay was used to assess cell damage and western blot was used to observe antioxidant activity of hPDLSCs in oxidative stress. Immunohistochemistry was performed for inverting the localization of the SOD and Nrf2 antibody.
Results : We found that progressive cell death was induced in hPDLSCs by H2O2 treatment. However, low-dose celecoxib reduced H2O2-induced cellular damage and eventually enhanced the SOD activity and Nrf2 signal of hPDLSCs. Oxidative stress-induced morphological change in hPDLSCs included lowered the survival and number of spindle-shaped cells, and shrinkage and shortening of cell fibers. Notably, celecoxib promoted cell survival function and activated antioxidants such as SOD and Nrf2 by positively regulating the cell survival signal pathway, and also reduced the number of morphological changes in hPDLS. Immunohistochemistry results showed a greater number of SOD- and Nrf2-stained cells in the celecoxib-treated group following oxidative stress.
Conclusion : By increasing SOD and Nrf2 expression at the antioxidant system, the findings suggest that celecoxib enhanced the antioxidative ability of hPDLSCs and protected cell viability against H2O2-induced oxidative stress by increasing SOD and Nrf2 expression in the antioxidant system.
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KEYWORD
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antioxidant, celecoxib, human periodontal ligament stem cells, Nrf2, SOD
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