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. 2014 Feb 1;9(3):285–292. doi: 10.4103/1673-5374.128225

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Copyright: © Neural Regeneration Research

This is an open-access article distributed under the terms of the Creative Commons Attribution-Noncommercial-Share Alike 3.0 Unported, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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Photographs of PC12 cells after incubation with MWCNTs-EDA for 48 hours (× 200).

Control group (A) contains no CNTs, only cells. From the inverted microscopy images, the numbers of adhered and viable cells decreased, and the refractivity (arrows) of PC12 cells falls, after culture with 50 μg/mL MWCNTs-COOH (B) and MWCNTs-EDA (C) for 48 hours. Furthermore, the changes in the MWCNTs-COOH group are greater than those in the MWCNTs-EDA group. MWCNTs: Multi-walled carbon nanotubes; EDA: eth-ylenediamine.