(A, B) Liver pictures of mice injected with scrambled siRNA loaded NPs (5mg/mL, 100μL) (A) and FITC tagged siRNA-loaded NPs (5mg/mL, 100μL) (B). After intravenous injection of FITC tagged siRNA-loaded NPs (5mg/mL, 100μL) (green), mice were sacrificed 4 h later and liver samples were stained for Alexa Fluor 568 phalloidin (red) and DAPI (blue). Representative hematoxylin and eosin (D, F) and Sirius Red (C, E)-stained sections of liver from 8 weeks high far diet fed mice receiving respectively scrambled siRNA-loaded NPs (5mg/mL, 100μL) (C, D) or CD98 siRNA-loaded NPs (5mg/mL, 100μL) (E, F) for 12 weeks. Scale bar is 50 μm. n = 5 mice per group. Hematoxylin and Eosin Y stained liver tissue was scored using the scoring system developed by Kleiner et al 34 of mice injected twice weekly with NP treatments (5mg/mL, 100μL) (G).