Figure 4

Quantification of mRNA expression of different genes. Analysis of mRNA expression of COX-2, VEGF and EGFR was performed on four groups: control, radiotherapy (800 cGy) after isoproteronol (25 μM), radiotherapy (800 cGy) and radiotherapy (800 cGy) after propranolol (50 μM) using an iCycler (Bio-Rad). Expression of COX-2, VEGF and EGFR was reduced significantly in different groups (*p < 0.05 versus the control group).