Abstract
The ability of glutathione to affect melanocyte survival has fostered its use in a variety of applications related to epithelial cells. Our study focused on fibroblast migration and the effects of oxidative stress. We used scratch assays to measure cell migration: fibroblasts were harvested from embryonic chicks, grown to confluence in a monolayer, and the layer was scratched to initiate migration. Migration rates were measured over 8 h using photomicrographs, and vinculin expression as an indicator focal adhesion formation was measured using immunofluorescence. Addition of 200 μM glutathione to the culture media in which the cells grew resulted in a significantly increased rate of scratch closure. When the scratch assays were performed in the presence of 100 μM H2O2 (to simulate oxidative stress), the cells ceased to migrate. Addition of 200 μM glutathione to the H2O2-treated scratched layers resulted in a restoration of the scratch closure capabilities. At the subcellular level, addition of extracellular glutathione resulted in a redistribution of vinculin into fewer but larger aggregates. In cells at the edge of scratched monolayers that were treated with H2O2, vinculin particles were distributed throughout the cell in smaller aggregates; addition of glutathione resulted in vinculin aggregates that were larger and closer to the edges of the cell, indicating that these cells were more migratory. Our results suggest that glutathione promotes fibroblast migration, possibly via a mechanism that promotes the formation of focal adhesions.
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DeNunzio, M., Gomez, G. Extracellular glutathione promotes migration of hydrogen peroxide-stressed cultured chick embryonic skin cells. In Vitro Cell.Dev.Biol.-Animal 50, 350–357 (2014). https://doi.org/10.1007/s11626-013-9696-z
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DOI: https://doi.org/10.1007/s11626-013-9696-z