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. 2018 Jul 5;8(7):496. doi: 10.3390/nano8070496

Figure 4.

Figure 4

Determination of AuNPs generated cytotoxicity towards primary human dermal fibroblasts (HDFs). Cells were treated with different concentrations of AuNPs for 24 and 72 h. Cell viability of 50% confluent HDFs after 24 (A) and 72 h (B) exposure; and 80% confluent cells after 24 (C) and 72 h (D). The untreated cells served as controls. The results are represented as ±standard error mean (SEM) (n = 3). * p < 0.05, ** p < 0.01, *** p < 0.001, **** p < 0.0001. Asterisks indicate statistical significance compared to the control.