Fig. 5From: Hydrogel–metal-organic-framework hybrids mediated efficient oral delivery of siRNA for the treatment of ulcerative colitisColon accumulation and blood circulation of MOF-RhoB and SA@MOF-RhoB. a Biodistribution of particles in colon detected by multimode optical in vivo imaging system. b Statistic fluorescence intensity. c RhoB intensity identified in serum. d Changes of fluorescence intensity in serum over time. *means P < 0.05Back to article page