Hydroxyl radicals and oxidative stress: the dark side of Fe corrosion
(2020) Colloids and Surfaces B: Biointerfaces — Vol. 185, p. 110542 [1-9] (2020)
Files
Scarcello_Colloids_And_Surfaces_B_2019.pdf
Open Access - Adobe PDF
- 1.09 MB
Details
- Authors
Scarcello, Eleonora 
Turci, Franscico Lison, Dominique
- Abstract
- Fe-based materials are considered for the manufacture of temporary implants that degrade through the corrosion of Fe by oxygen. Here we document the generation of hydroxyl radicals (HO˙) during this corrosion process, and their deleterious impacts on human endothelial (ECs) and smooth muscle cells (SMCs) in vitro. The generation of HO˙ was documented by two independent acellular assays, terephtalic acid hydroxylation (fluorescence) and spin trapping technique coupled with electron paramagnetic resonance spectroscopy. All Fe-based materials tested exhibited a strong potential to generate HO˙. The addition of catalase prevented the formation of HO˙. Cellular responses were assessed in two ECs and SMCs lines using different cytotoxicity assays (WST-1 and CellTiter-Glo). Cells were exposed directly to Fe powder in the presence/absence of catalase, or to extracts obtained from the corrosion of Fe. Cell viability was dose-dependently affected by the direct contact with Fe materials, but not in the presence of catalase or after indirect exposure to cell extracts. The deleterious effect of HO˙ on ECs and SMCs was confirmed by the dose-dependent increase of the transcripts of the oxidative stress gene heme oxygenase-1 4 h or 6 h after direct exposure to the particles, but not in presence of catalase or after indirect exposure. The demonstration of HO˙production during corrosion and consequent oxidative stress on human ECs and SMCs newly reveals a deleterious consequence of Fe-corrosion that should be integrated in the assessment of the biocompatibility of Fe-based alloys.
- Affiliations
Citations
Scarcello, E., Herpain, A., Tomatis, M., Turci, F., Jacques, P., & Lison, D. (2020). Hydroxyl radicals and oxidative stress: the dark side of Fe corrosion. Colloids and Surfaces B: Biointerfaces, 185, 110542 [1-9]. https://doi.org/10.1016/j.colsurfb.2019.110542 (Original work published 2020)