Figure 6

Immunohistochemical staining for HBsAg (A-D) and HBcAg (E-H) in liver sections. Treatment with pWPT-HBV-shRNA-1 lentivirus(C, G) or pWPT-HBV-shRNA-2 lentivirus (D, H) reduces the number of HBsAg or HBcAg-positive cells on day 7 respectively compared to the control. The staining was performed on tissue sections from three animals per group. Representative sections are shown (four sections per animals were stained and counted). Numerous HBsAg-positive and HBcAg-positive cells were seen in the empty vector group (A, E) and negative control RNAi group (B, F). No HBsAg-positive stained cells were observed in most fields in pWPT-HBV-shRNA-2 group(D). Some stained cells could be seen in pWPT-HBV-shRNA-1 or shRNA-2 groups(C, G, H) and these were indicated by arrows, but staining were much less intense than that in control groups (100× original magnification, scale bar 200 μm).