Fig. 4From: Hollow polydopamine nanoparticles loading with peptide RL-QN15: a new pro-regenerative therapeutic agent for skin woundsThe effects of HPDAlR on the release of cytokines from macrophage. A–E Effects of HPDAlR on release of TNF-α, TGF-β1, IL-1β, IL-6, and VEGF from RAW264.7 cell respectively. Data were expressed as Mean ± SD of three independent experiments performed in triplicate. *P < 0.05 and **P < 0.01 indicated statistically significant differences between the two groups (Student t-test)Back to article page