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• W4319656670 endingPage "14" @default.
• W4319656670 startingPage "14" @default.
• W4319656670 abstract "Purpose: To investigate effects of magnetic microparticles on movement of magnet controlled human corneal endothelial cells (HCECs). Methods: Immortalized HCEC line (B4G12) and primary culture of HCECs were exposed to two commercially available magnetic micro- or nanoparticles, SiMAG (average size 100 nm) and fluidMAG (average size <1000 nm). Cell viability assays and reactive oxygen species production assays were performed. Cellular structural changes, intracellular distribution of microparticles, and expression levels of proteins related to cellular survival were analyzed. Ex vivo human corneas were exposed to microparticles to further evaluate their effects. Magnetic particle–laden HCECs were cultured under the influence of a neodymium magnet. Results: No significant decrease of viability was found in HCECs after exposure to both magnetic particles at concentrations up to 20 µg/mL for 48 hours. However, high concentrations (40 µg/mL and 80 µg/mL) of SiMAG and FluidMAG significantly decreased viability in immortalized HCECs, and only 80 µg/mL of SiMAG and FluidMAG decreased viability in primary HCECs after 48 hours of exposure. There was relative stability of viability at various concentrations of magnetic particles, despite a dose-dependent increase of reactive oxygen species, lactate dehydrogenase, and markers of apoptosis. Ex vivo human cornea study further revealed that exposure to 20 µg/mL of SiMAG and fluidMAG for 72 hours was tolerable. Endocytosed magnetic particles were mainly localized in the cytoplasm. The application of a magnetic field during cell culture successfully demonstrated that magnetic particle–loaded HCECs moved toward the magnet area and that the population density of HCECs was significantly increased. Conclusions: We verified short-term effects of SiMAG and fluidMAG on HCECs and their ability to control movement of HCECs by an external magnetic field. Translational Relevance: A technology of applying magnetic particles to a human corneal endothelial cell culture and controlling the movement of cells to a desired area using a magnetic field could be used to increase cell density during cell culture or improve the localization of corneal endothelial cells injected into the anterior chamber to the back of the cornea." @default.
• W4319656670 created "2023-02-10" @default.
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• W4319656670 date "2023-02-09" @default.
• W4319656670 modified "2023-09-26" @default.
• W4319656670 title "Effect of Magnetic Microparticles on Cultivated Human Corneal Endothelial Cells" @default.
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• W4319656670 doi "https://doi.org/10.1167/tvst.12.2.14" @default.
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