All mice were sacrificed on the 42nd day, and the final tumor volume and weight in SiTF group (209.6 ± 97.6 mm3 and 0.21 ± 0.10 g, n = 5) were markedly smaller than that in control group (600.8 ± 182.0 mm3 and 0.59 ± 0.18 g, n = 5) and mock group (513.8 ± 112.6 mm3 and 0.52 ± 0.12 g, n = 5) (Figure 18 and Figure 19).

In addition, the relative protein expression of TF in SiTF group was decreased significantly, but there was no statistical significance between control group and mock group (Figure 20). After all, these results indicated that intratumoral injection with TF-siRNA suppressed the tumor growth of lung adenocarcinoma cells in vivo. Figure 18 Tumor volume curve and bar graph of tumor weight on the 42nd day when mice were killed.

(A): The curve showed that the tumor growth of SiTF group from days 22 to the end was significantly inhibited compared to that of GSK1838705A cost control and mock selleck inhibitor groups. (B): Bar represented that the tumor weight of SiTF group was decreased than that of control and mock group. **P < 0.01 versus mock. Figure 19 Knockdown of TF by siRNA inhibited the tumor growth of lung adenocarcinoma cells in nude mice. (A and B): Representative images showed that the tumor size of SiTF group was markedly smaller on the 42nd day after tumor cells inoculation than that of control Cyclosporin A in vivo and mock group. Figure 20 TF-siRNA inhibited the protein expression of TF in vivo as determined by Western blot. Representative images were shown and bar represented that the relative expression of TF in SiTF group was significantly inhibited compared Farnesyltransferase to that in control and mock groups. **P < 0.01 versus mock. Discussion Despite advances in the medical and surgical treatments, lung cancer is the leading cause of cancer deaths [1]and because of intrinsic properties of lung adenocarcinoma which cells show a high ability to rapid progress, it has a poor prognosis in main histological types

of lung cancer [24, 25]. Tumor progression includes tumor cell proliferation, invasion (loss of cell to cell adhesion, increased cell motility and basement membrane degradation), vascular intravasation and extravasation, establishment of a metastatic niche, and angiogenesis [23, 26, 27]. Therefore, how to effectively inhibit the proliferative and metastatic biological behavior of Lung adenocarcinoma cells is a key problem to improve the outcome. Recent studies have implicated that TF plays an important role in biological processes of many cancers, and the main mechanism is mediated via angiogenesis [28, 29]. In non-small-cell lung carcinomas, the increased TF expression associated with high VEGF levels and microvessel density has gained widespread acceptance [6, 30].