Fig. 6 Quantitative real-time PCR analysis of Caspase-3(A), Caspase-10 (C)and Bcl-2 (B)mRNA transcripts in PDT-treated HeLa cell after treated with 0, 10, 30 and 60pg/mL R-PE.Caspase-3, Caspase-10 and Bcl-2 mRNA levels were normalized with beta-actin mRNA levels. Bars represented the mean±SD (n=3) .significant differences between R-PE PDT-treated and the control were indicated with one (p < 0.05) or two (p < 0.01) asterisks.