2 mg/mL). Cells were allowed to adhere at 37°C for 30 minutes, 60 minutes, and 90 minutes, then washed three times with phosphate-buffered saline (PBS). MTT was added to each well and incubated for another 4 hours. The number of adherent cells was estimated by reading the absorbance at a wavelength of 570 nm.30 For in vivo metastasis assays, 5 × 106 QGY-7703 and 1 × 107 HepG2 cells (stably transfected with pcDNA3-pri-10a, pRNAT-U6.2/Lenti-anti-miR-10a, and their control vectors) were suspended in 40 μL of serum-free RPMI 1640 / Matrigel (1:1) for each mouse. Each nude mouse (10

in each group, female BALB/c-nu/nu at 5-6 weeks of age) was inoculated in the upper pole of the spleen with a microsyringe under anesthesia. After 6 or 8 weeks mice were sacrificed and their spleens and livers were harvested and fixed with phosphate-buffered SAHA HDAC purchase neutral formalin and prepared for standard histological examination. All studies were performed under the American Association for the Accreditation of Laboratory Animal Care guidelines for humane treatment of animals and adhered to national and international standards. In these two assays, polyclonal rabbit antihuman EphA4 and E-Cadherin (Saierbio, Tianjin, China) were used. Details are in the Supporting Information. Data are presented as the mean

± standard deviation (SD). Statistical analyses were performed using a paired t test to compare data. P < 0.05 was considered statistically significant. To determine whether miR-10a had an effect on the malignant H 89 phenotype of HCC cells, we constructed an miR-10a expression plasmid (pcDNA3-pri-10a, pri-miR-10a) and validated the efficiency of pri-miR-10a and ASO-miR-10a (Supporting Fig. 1). QGY-7703 and HepG2 cells were then transfected with them or their respective controls to explore their effects on the cancer cells. MTT or colony formation assays showed no significant differences in cell viability or proliferation

when miR-10a was overexpressed or blocked (Supporting Fig. 2). However, in transwell assays the migration (Fig. 1A) and invasion (Fig. 1B) capacities of QGY-7703 and HepG2 cells transfected with pri-miR-10a were increased by ∼1.6- to 2.5-fold. 上海皓元 ASO-miR-10a reduced these capacities by ∼50%-70% when compared with the controls. The representative images are shown in Supporting Fig. 3. These data indicated that miR-10a promoted both the migration and invasion of HCC cells. We also detected the expression level of miR-10a in HCC cell lines, QGY-7703, HepG2, PLC-PRF-5, and Hep3B (Supporting Fig. 4), and found that the expression of miR-10a was highest in HCC cell PLC-PRF-5, whereas it was lowest in the low-invasive cell line Hep3B. The expression level of miR-10a in QGY-7703 was higher than in HepG2 cells. This result suggested that miR-10a was positively related to the invasion of HCC cells. We next explored the role of miR-10a in HCC metastasis in vivo.