v. injected with 0.1 ml AP26113 purchase Ad-PEDF (5 × 108IU/mouse), Ad-Null (5 × 108 IU/mouse), or NS, respectively. After a week, this same treatment on each mouse was repeated. On day 11 after tumor cell implantation, all mice were injected i.v. with 100 μl FITC-dextran (Sigma-Aldrich, St. Louis, Missouri, US) solution (100 mg/ml), which is a plasma-borne tracer extravasating into tissue interstitial fluid from plasma within 20 minutes. Alginate beads were exposed surgically and photographed with a digital camera (model, Canon, Japan). Then, the beads were removed and vortexed in a tube containing 2 ml NS. After centrifugation,

the supernatant was collected and subjected to a fluorescence spectrophotometer for the measurement of fluorescence selleck chemicals intensity. The amount of FITC-dextran was calculated and used to estimate the amount of blood supply and angiogenesis status. Statistical analysis SPSS program (version 15.0, SPSS Inc., USA) was used for statistical analysis. Log-rank test was used to compare survival rate among groups. ANOVA was used to determine statistical significances in remaining comparisons in this study. The difference is considered as significant if p < 0.05. Results Recombinant Ad-PEDF virus successfully

transferred PEDF gene into tumor cells and produced secretory PEDF protein in vitro Whether an adenovirus-mediated gene transfer is successful or not mainly depends on its capacity to infect host cells and express the recombinant gene. Therefore, we first tested whether our recombinant Ad-PEDF virus is capable of infecting MK-8931 cells and expresses PEDF protein in vitro. CT26 and B16-F10 cell lines were infected with Ad-PEDF, Ad-null or

treated with normal saline (NS). Three types of supernatant from each cell line were prepared and subjected to Western blotting analysis. As shown in Fig. 1, PEDF was detected in supernatant from both cell lines infected by Ad-PEDF virus, but neither in Ad-null infected nor NS treated cells. These results indicate that ZD1839 in vivo our recombinant adenovirus successfully transfers the PEDF gene into cultured cells and produces secretory protein. Figure 1 Expression of human PEDF in Ad-PEDF infected cell lines. Supernatant from Ad-PEDF, Ad-Null infected and normal saline (NS) treated CT26 and B16-F10 cells were collected and subjected to Western blot analysis with an anti-human PEDF mAb. Human PEDF was detected as a single band of 50 KDa in Ad-PEDF infected cells, but neither in Ad-null infected nor NS-treated cells. PEDF protein from Ad-PEDF infected cells exhibited a potent inhibitory effect on HUVEC proliferation Next, we tested whether Ad-PEDF from infected cell possess inhibitory bioactivity on the proliferation of epithelial cells. Using the MTT assay, we measured HUVEC cell proliferation and viability after treatment of supernatant from Ad-PEDF infected B16-F10 cells or control supernatant.