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Cytotoxicity evaluation of iron nitride nanoparticles for biomedical applications
Author(s) -
Shibata Misaki,
Kanetaka Hiroyasu,
Furuya Maiko,
Yokota Kotone,
Ogawa Tomoyuki,
Kawashita Masakazu
Publication year - 2021
Publication title -
journal of biomedical materials research part a
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.849
H-Index - 150
eISSN - 1552-4965
pISSN - 1549-3296
DOI - 10.1002/jbm.a.37171
Subject(s) - biocompatibility , nanoparticle , materials science , cytotoxicity , trypan blue , magnetic nanoparticles , viability assay , nanotechnology , mtt assay , biomedical engineering , chemistry , cell , medicine , in vitro , biochemistry , metallurgy
Magnetic nanoparticles are widely studied for their use in various therapeutic and diagnostic purposes. As biomaterials, their biocompatibility is as important as their magnetic properties. Iron nitride (Fe x N y ) has excellent magnetic properties, and thus Fe x N y nanoparticles could be useful as potential biomaterials. However, the biocompatibility of Fe x N y nanoparticles is yet to be investigated. In this study, we assessed the biocompatibility of Fe x N y nanoparticles by evaluating their direct‐contact cytotoxicity compared with that of magnetite nanoparticles (MNPs). Rat fibroblasts were incubated with the nanoparticle samples dispersed in culture medium at concentrations of 10, 50, and 100 μg/ml. The DNA concentration measurement, MTT assay, and trypan blue exclusion test were conducted after days 1 and 3 of incubation. After day 1, the cell viability decreased, and cell death increased with increasing sample concentration when compared with the control. However, after day 3, there were no significant differences when compared with the control, irrespective of the sample concentrations. Further, there were no significant differences between the Fe x N y nanoparticles and MNPs at the same concentrations in all the cytotoxicity evaluation tests. Therefore, it is suggested that Fe x N y nanoparticles might be as cytocompatible as the conventional MNPs.