FS14-NP/siRNA Accumulation in Inflammatory Joints
Arthritic mice were injected intravenously with (a) FS14-NP/Cy5.5-siRNA, (b) free Cy5.5-siRNA, and (c) PBS. (A) In vivo imaging showing accumulation of FS14-NP/Cy5.5-siRNA in arthritic joints at 24 h after injection. (B) Organs and (C) paws were imaged after 24 h injection. (D) Co-localization of FS14-NP/Cy5.5-siRNA (red) with synovial macrophages (F4/80, green). Nuclei were stained with DAPI (blue), and blood vessels (V) are outlined (white). Scale bars, 50 μm.