Fig. 5

Macrophage polarization after activation by different concentrations of gold nanoparticles (AuNP), 12.5, 25 and 50 ppm, with control phosphate buffer solution (PBS) or endotoxin is shown. Relative mRNA expression in iNOS (a) and Arginase1 (b) represents M1 and M2 macrophage polarization, respectively (duplicate independent experiments were performed)