Fig. 4From: Melanin-like polydopamine nanoparticles mediating anti-inflammatory and rescuing synaptic loss for inflammatory depression therapyPDA NPs successfully penetrated BBB to enter the brain. a Schematic illustration showing the experimental procedures for fluorescent images of mice. b Representative Cy5.5 fluorescence imaging showing the whole-body distribution of PDA NPs in mice after 2Â h and 24Â h of Cy5.5-PDA-SiO2 NPs injection. c Quantification of Cy5.5 intensity in brain 2Â h and 24Â h after injection. d The Cy5.5 fluorescent images and e the corresponding bar graphs showing the organ distribution of PDA NPs. PBS phosphate-buffered saline, Cy5.5-PDA-SiO2 NPs cyanine 5.5-polydopamine-silica nanoparticlesBack to article page