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. Author manuscript; available in PMC: 2014 Aug 1.
Published in final edited form as: Nanomedicine. 2013 Feb 20;9(6):786–794. doi: 10.1016/j.nano.2013.01.007

Figure 4.

Figure 4

Midsection confocal images of MAECM exposed at 37°C apically to (A) PNP (120 nm amidine-modified, positively charged) or (B) PNP (100 nm carboxylate-modified, negatively charged) at 176 µg/mL for 24 h. Cell borders are stained for ZO-1 (red in panel A and green in panel B), nuclei are stained by DAPI (blue) and PNP appear green in panel A and red in panel B. PNP are largely intracellular (i.e., not at cell-cell junctions or in nuclei).