Figure 8From: Cytotoxicity and cellular uptake of tri-block copolymer nanoparticles with different size and surface characteristics Comparison of TNF-α release induced by PNP 45 (Δ) and PNP 90 (▲) in NR8383 and Caco-2 cells after 24 h exposure. The * sign signifies p < 0.05 compared to negative control (0 μg/ml). The “†” sign signifies p < 0.05 when compared between the PNP45 and PNP90.Back to article page