All animal experiments were conducted under an approved protocol from Shanghai Jiaotong University and performed in accordance with the animal care guidelines of the Stem Cells inhibitor Chinese Council. Hep3B tumors were introduced by subcutaneous injection of 1 × 107 Hep3B cells in 50 μL of PBS into the right hind limbs of mice. When tumor size reached 1 cm in diameter, a total of 2 × 108 Adcmv-hGMCSF-hsp-hIL12 was injected into tumor. Mice were divided into 3 groups: BIBF 1120 manufacturer non-heating group, one-time heating group, and three-time
heating group. In non-heating group, animals were sacrificed on day 1, 2, 3 and 4 post virus injection. In the one-time heating group, tumors were heated once 24 hrs post virus injection and animals were sacrificed on day 1, 2, 3 and 4 post heat treatment. In three-time
heating group, tumors were heated on day 1, 3, and 5 post virus injection and animals were sacrificed on day 4, 5, 6, 7 post first heat treatment. Tumors were heated to 42°C in a water bath for 40 min by immersing the tumor-bearing leg in the water bath [18]. Tumor tissues were homogenized for hGM-CSF and hIL-12 detection. Detection of GM-CSF and IL-12 levels The hGM-CSF and hIL-12 levels in cell culture medium and tumor tissues homogenate were detected with human GM-CSF and human IL-12 ELISA kits (R&D Systems, Minneapolis, MN). Results hGM-CSF and hIL-12 expression in Adcmv-hGMCSF-hsp-hIL12 virus infected A549 and Hep3B cells As shown in Figure 2, 1000, 500 and 100 viral particle per cell VX-680 ic50 (vp) infected cells exhibited significant increases in the production of hGM-CSF and hIL-12 in A549 after heat treatment (Figure 2A, B). In Hep3B cell medium, 1000 vp of virus infection significantly increased hIL-12 (p=0.001) and hGM-CSF (p = 0.008) production 24 hrs after heat treatment. 500 vp and 100 vp virus infected cells also exhibited significant increases in the production of hGM-CSF and hIL-12
after heat treatment (Figure 2A, B). Heat treatment induced 8.79 ± 0.64 and 12.37 ± 2.41 fold increases in hIL-12 production in 1000 vp and 500 vp virus infected A549 cells (Figure 2C). In Hep3B cells, heat treatment induced 6.13 ± 1.89 and 3.46 ± 0.36 fold increases in cells infected with 1000 vp and 500 vp virus respectively, whereas heat treatment induced 19.02 ± 4.95 fold increase in cells infected with 100 vp virus (Figure 2D). In both A549 and triclocarban Hep3B cells, hGM-CSF expression showed dependence on virus dosage. Although hGM-CSF was driven by CMV promoter, hGM-CSF expression was increased 1.48 ± 0.08 fold in A549 cells and 2.81 ± 0.29 fold in HepB3 cells after heat treatment. Figure 2 hGM-CSF and hIL-12 expression in heat treated A549 and Hep3B cells. A549 and Hep3B cells in 24-well plates were infected with Adcmv-hGMCSF-hsp-hIL12 virus for 24 hrs and heated at 45°C for 45 min. Twenty-four hours late, medium was collected for hGM-CSF and hIL-12 measurement.