Unfortunately, little is known about its role in the process of tumor angiogenesis. In this study, we investigated the effects

and potential mechanisms of parthenolide LY2606368 in vitro on angiogenesis in human colorectal cancer (CRC). Methods: HUVEC, human umbilical vein endothelial cells, was treated with PT at different concentrations. The MTT assay and flow cytometry analysis using PI were used to analyze cell death. We determined the effect of PT on tube formation and migration in HUVEC cells. Then, protein level of the angiogenesis related factors such as VEGF, VEGFR-1 and VEGFR-2 were observed in HUVEC cells and human colorectal cancer cells (HT-29, SW620, HCT-116). HT-29 cells xenograft model in nude mice was also used to investigate the in vivo inhibitory effects on angiogenesis by PT. Results: Suppression of proliferation, migration, check details and the tube formation capacity of HUVEC cells were observed after PT treatment. Angiogenesis related

proteins are also decreased by PT in HUVEC cells. Moreover, PT effectively inhibited proliferation of colorectal cancer cells and expression of angiogenesis related proteins in vitro. Intraperitoneal injection of PT showed significant inhibition of growth in the xenograft model via decreased production of VEGF. Conclusion: These results demonstrate that PT exhibits inhibitory effect on angiogenesis in human colorectal cancer in vitro and in vivo. Key Word(s): 1. MCE Angiogenesis; 2. Colorectal cancer; 3. Parthenolide; 4. Apoptosis; Presenting Author: DEQIANG HUANG Additional Authors: HUI LIN, SANSAN JIANG, NIANSHUAN NIANSHUAN, LINGYU LUO, NONGHUA NONGHUA Corresponding Author: NONGHUA NONGHUA Affiliations: The first affilated hospital of Nanchang University; The first affiliated hospital of Nachang University; The first affiliated hospital

of Nanchang University; The first affiliated hospital of Nanchang university Objective: Metformin, a derivative of biguanide, is a first-line therapy for type 2 diabetes mellitus, Previous studies have demonstrated the anti-cancer activity of metformin in various types of cancer cells, However, the manner in which metformin regulate migration or related epithelial-to-mesenchymal transitions (EMT) has yet to be elucidated. The aim of this study was to explore the effect of meformine on growth and migration using AGS gastric cancer cells. Methods: Cell viability was determined by the conventional MTT assay; Cell migration (wound healing) assay was conducted to determine the capacity of cell migration; The expression of EMT markers was analyzed by Western blotting. Results: We found that metformin reduced growth of AGS cells in a dose-dependent manner (Fig. 1). In addition, the drug significantly inhibited the migration of AGS cells (Fig. 2). Furthermore (Fig. 3), metformin strongly decreased vimentin (a mesenchymal marker) expression, while increasing E-cadherin (an epithelial marker) expression.