Figure 5From: Cytotoxicity and cellular uptake of tri-block copolymer nanoparticles with different size and surface characteristics Intracellular ROS induction in NR8383 and Caco-2 cells after 24 h exposure to PNP 90 -NH 2 (▲), PNP 90 -OH (■) and PNP 90 -COOH (●). The * sign signifies p < 0.05 compared to negative control (0 μg/ml).Back to article page