Table 10.

SOD activity of A375 cells after 24 h and 72 h incubation with 20 nm and 100 nm Au NPs (pcs/mL).

Control or pcs/mL	24 h∗ SOD activity (inhibition rate percent)		72 h SOD activity (inhibition rate percent)
Control	50.65 (44.89–55.07)		49.98 (48.88–57.95)
	20 nm	100 nm	20 nm	100 nm
1.6 × 107		45.55 (22.32–50.42)		46.11 (25.86–66.36)
1.6 × 109	30.06 (21.87–46.88)	47.77 (40.24–63.26)	56.62∗ (56.18–58.39)	46.88 (46.22–51.31)
1.6 × 1011	56.84 (39.36–64.81)		54.41 (54.41–54.41)

Results are expressed as median (lower quartile–upper quartile).

∗Significance over time (between 24 h and 72 h) in cells incubated with NPs of a given size and concentration (∗P < 0.05).