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. 2019 Nov 20;21(1):181–190. doi: 10.3892/mmr.2019.10834

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Copyright: © Yu et al.

This is an open access article distributed under the terms of the Creative Commons Attribution-NonCommercial-NoDerivs License, which permits use and distribution in any medium, provided the original work is properly cited, the use is non-commercial and no modifications or adaptations are made.

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Figure 3. — Cytotoxicity assay. LX-2 cells were incubated with either PEI-Fe₃O₄ or PEI-Fe₃O₄/siRNA at different concentrations ranging from 10 to 80 µg/ml (Fe concentration) for 24 and 48 h, and cell viability was then measured by MTT assay. The data are displayed as the mean ± SD (n=3). *P<0.05 vs. 0 µg/ml. PEI-Fe₃O₄, polyethyleneimine-functionalized magnetic iron oxide; siRNA, small interfering RNA.