Metastatic tumors included 28 intrahepatic (26 portal vein and two cholangiotube) and 19 extrahepatic metastases (12 peritoneum, four lymph nodes, one kidney, one adrenal cortex, and one bone metastasis). All samples were anonymously coded according to the local ethical guidelines (as outlined by the Declaration of Helsinki), and informed consent was obtained from all patients. Cell line information is described in the Supporting Materials and Methods. EIF5A-ORF and EIF5A2-ORF were polymerase chain reaction (PCR)-amplified and cloned into expression vector pcDNA3.1(+) (Invitrogen, selleck screening library Carlsbad, CA) and

stable EIF5A2-expressing clones in LO2 cells were selected as described.11 A detailed protocol of TMA construction and IHC staining is described in the Supporting Materials and Methods. The monoclonal anti-EIF5A2 antibody showed no crossreactivity with EIF5A (Supporting Fig. S1). To evaluate

IHC staining of EIF5A2, expression of EIF5A2 was scored as negative (total absence of staining), weak (faint staining in <50%, or moderate staining in <25% of tumor cells), moderate (moderate staining in ≥25% to <75%, or strong staining in <25% of tumor cells), and strong (moderate staining in ≥75%, or strong staining in ≥25% of tumor cells). In this study we characterize negative/weak expression of EIF5A2 as “normal expression” and moderate/strong expression of EIF5A2 as “overexpression.” Both staining intensity and percentage of positive cells were scored by two experienced pathologists. Refer to the Supporting Methods for a detailed description of experiment protocols. Western blot analyses were performed with the Selleck PLX-4720 standard protocol. Antibody information is listed in the Supporting Methods. The wound-healing assay is described in the Supporting Methods. The transwell cell migration assay and invasion assay were performed in polyethylene terephthalate (PET)-based migration chambers and BD BioCoat Matrigel Invasion Chambers (Becton Dickinson Labware, Franklin Lakes, NJ) with 8 μm porosity according to the manufacturer’s instructions Carnitine palmitoyltransferase II for 48 hours. The mouse model of experimental metastasis is described

in the Supporting Methods. The RNAi experiment protocol is described in the Supporting Methods. The detailed protocol of IF is described in the Supporting Methods. PAK1 PBD-agarose (for isolating Rac1-GTP and Cdc42-GTP) and rhotekin-agarose (for isolating Rho-GTP) (Upstate Biotechnology, Lake Placid, NY) were used to pull down the GTP-bound form of Rho-GTPase according to the manufacturer’s manual. The levels of active Rac1, Cdc42, and RhoA were detected by western blot using specific polyclonal anti-Rac1, Cdc42, and RhoA antibody (Cell Signaling Technology, Beverly, MA). Statistical analysis was performed with SPSS for Windows v. 13.0 (Chicago, IL). The two-tailed chi-squared test was used to analyze the association of EIF5A2 overexpression with different clinicopathological characteristics.