(D) A transplantation tumor from the NCI-H446/siHIF-1α group (10 d after implantation). (E) A transplantation tumor from the NCI-H446/Ad5 group (10 d after implantation). (F) A transplantation tumor from the NCI-H446/Ad5-siRNA group (10 d after implantation). (G) Comparing to the growth curves in NCI-H446 group the tendency of the curves in NCI-H446/Ad5 group

and NCI-H446/Ad5-siRNA group had no significant changes. (*p > 0.05 represents NCI-H446 group vs. NCI-H446/Ad5 group; **p > 0.01 represents NCI-H446/Ad5-siRNA group vs. NCI-H446 group). The angiogenic image was captured (Figure 4A) and converted to grayscale (Figure 4B). We then eliminated the background of the graph (Figure 4C) and marked the vessels for quantification (Figure 4D). Our I-BET-762 cost results indicated that on day 17 of incubation the angiogenic reaction reached the most intense level. NCI-H446 cells stimulate angiogenesis and the cells transduced with HIF-1α significantly promote the angiogenic effect. In contrast, the blockade of HIF-1α by Ad5-siHIF-1α inhibited the angiogenic effect (Table 2). In addition we also found that two parameters showed the similar increasing trends along with the growth of transplantation tumor and

the time of transduction by HIF-1α (Table 2). Figure 4 Angiogenesis quantification of CAM. The entire process of angiogenesis quantification on the CAM was divided into four steps. (A) The image of one special domain in the CAM was collected for the assay. (B) The background of the image was check details cleaned up. (C) The profiles of the vessels for the assay were deepened. (D) The result of the MIQAS quantified system analysis for the number of vessel branch points as marked by the red points. Table 2 Quantification of vessel area and the number of vessel branches

around the transplantation tumor   day 8 day 11 day 14 day 17 Vessel length (pixels)         find more Control (n = 10 × 4) 2106 ± 143 1967 ± 113 1457 ± 135 oxyclozanide 2183 ± 156 NCI/H446(n = 10 × 4) 2452 ± 117 2564 ± 96* 2687 ± 103* 2798 ± 135* NCI/H446/HIF-1α(n = 15 × 4) 2742 ± 83 2814 ± 154 2910 ± 137§ 2994 ± 124§ NCI/H446/siHIF-1α(n = 12 × 4) 2331 ± 53# 2268 ± 106# 2236 ± 162# 2203 ± 116# Vessel Branch points         Control (n = 10 × 4) 76 ± 5 82 ± 9 73 ± 8 89 ± 5 NCI/H446(n = 10 × 4) 92 ± 7 101 ± 11 105 ± 6* 117 ± 7* NCI/H446/HIF-1α(n = 15 × 4) 116 ± 16 123 ± 11§ 128 ± 9§ 134 ± 21§ NCI/H446/siHIF-1α(n = 12 × 4) 82 ± 5# 87 ± 6# 92 ± 11# 102 ± 13# The MIQAS quantified system was used for the quantification of the two vessel parameters around the transplantation tumor in the CAM. Data are presented as means ± SD. *Significant difference from group controls at p < 0.05 by use of paired sample t-test §Significant difference from group controls at p < 0.05 by use of one-way ANOVA # significant difference from group controls at p < 0.