CDH17 and rheumatoid arthritis: The hyperplastic synovium of RA was mainly composed of the synovial macrophages and fibroblasts; thus, we utilized the immunofluorescence to investigate the distribution pattern of the FP/Cy5-labeled miR-23b nanoparticles in the synovial macrophages and fibroblasts of synovium, as characterized by marking F4/80 and cadherin, respectively.