Figure 7.

The effect of AuNPs on cell viability of MDA-MB-231 human breast cancer cells. MDA-MB-231 human breast cancer cells were treated with bio-AuNPs (A) or chem-AuNPs (B) at various concentrations from 0 to 100 μM/mL for 24 h, and cell viability was determined by the MTT method. The results are expressed as the mean ± SD of three separate experiments, each of which contained three replicates. Treated groups were not statistically different from the control group based on the Student's t test.