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| Sample | A549 | A549/MDR |
|---|---|---|
| ZA | >120 | 89.62 ± 7.81 |
| NZ | 20.22 ± 1.23 *,° | 20.78 ± 1.82 *,° |
| NB | >120 | >120 |
A549 and A549/MDR cells were incubated for 72 h with increasing concentrations of ZA, NZ or blank NPs (NB), then stained in quadruplicate with neutral red (n = 3). Versus NB, in each cell line: *p < 0.001; versus ZA, in each cell line: °p < 0.001.
