Figure 6. Infection of P55-HTERT-HRE-TRAIL induced apoptosis and enhanced TRAIL and Hexon expression. After infection with P55-HTERT-HRE (A, C, and E) or P55-HTERT-HRE-TRAIL (B, D, and F), the expression of TRAIL (A andB) and Hexon protein (C and D) were monitored by immunohistochemistry. Cell apoptosis were measured by TUNEL assay (E and F).