Fig. 3From: A novel delivery nanobiotechnology: engineered miR-181b exosomes improved osteointegration by regulating macrophage polarizationExo-181b increased the percentage of M2 polarization macrophages in vivo. a, b The representative images of the detection of CCR7 and CD206 positive cells of air pouch model treated by PBS, PT, PT + Exo-NC, PT + Exo-181b by flow cytometry analysis. c, d The corresponding quantification analysis of CCR7 and CD206 positive cells by flow cytometry analysis. (*p < 0.05). PBS phosphate buffer solution, PT porous titanium alloyBack to article page