Figure 7

Photographs of tube-like structures (B-L, x100). (B) Control; ( C - G ) HUVECs labeled with 5, 10, 25, 50 and 100 μg/mL 30 nm GMNPs; ( H - L ) HUVECs labeled with 5, 10, 25, 50 and 100 μg/mL 50 nm GMNPs. (A) Relative number of tube-like structures formed from HUVECs labeled with different concentrations of 30 and 50 nm GMNPs for 12 hours, ^* P < 0.05, compared with the control group.