Peptides were collected in supernatant. Protein identification by ESI-MS/MS ESI-MS/MS was conducted on a capillary system equipped with the Aksigent autosapmler(NanoLC-2D system, US.). A learn more reverse-phase column (C18, OD = 360 μm, ID = 4.6 μm) was used to separate.
The compartment of the autosampler was set at 10°C throughout the analysis. The mobile phase consisted of two components, with component (A) being 0.1% acetic acid and component (B) being 60% acetonitrile and 0.1% acetic acid. The solvent gradient was started from 5% B and held for 5 min, then programmed to 60% B in 40 min, and held for another 5 min, all at a flow rate of 300 L/min. MS-MS analysis were conducted on a Q-tof tandem mass spectrometer (Applied Biosystems, CA, USA). Positive ion mode ESI-MS was used for the analysis, with the TurboIonspray parameters optimized as follows: ionspray C646 purchase voltage (IS) 2200 V, declustering potential 60 V. The mass range chosen ranged from m/z 400 URMC-099 concentration to m/z 1600. The ion source gas I (GSI), gas II (GSII), curtain gas (CUR), and the temperature of GSII were set at 40, 5, 30 and 175°C, respectively. Western blotting After the BCA assay (Pierce, Rockford, IL) was used to quantify protein concentration, equal amounts of protein were loaded onto 12% gels (Invitrogen, Carlsbad, CA), separated by SDS-PAGE, and transferred to PVDF membranes (Immobilon
0.2 μm, Millipore, CA), which were then immersed in a blocking solution containing 5% skimmed milk and 0.1% Tween for 20 min. Afterwards, the membranes were washed and incubated with rabbit anti-coronin-1C (1:2000; Protein Tech Group, CA) or goat anti-integrin alpha 3 (ITGA3) (1:2000; Santa Cruz Biotechnology, Santa Cruz, CA) overnight at 4°C and then with goat anti-rabbit and rabbit anti-goat secondary antibody (1:3000; Protein Tech Group, CA) for 2 h at room temperature. Enhanced chemiluminescence Thymidine kinase (ECL; Amersham Biosciences, Piscataway, NJ) was used to visualize the immunoreactive bands.
All bands were scanned and analyzed by Syngene GeneGenius bioimaging systems (Synoptics Ltd, UK). Animals and nude mice model of spontaneous pulmonary metastasis Male athymic BALB/c nu/nu mice, 4 wks old, were obtained from Experimental Animal Institute of Hubei Center for Disease Control and Prevention and maintained in specific pathogen-free (SPF) condition at the Animal Experiment Center of Wuhan University. The facilities and the protocol of this experiment were consistent with the regulations on animal use for biomedical experiments issued by the Ministry of Science and Technology of China, and approved by the Animal Care Committee of Wuhan University. Both MHCC97L- and HCCLM9- nude mice were produced as described previously . All mice were sacrificed under deep anesthesia by peritoneal injection of 3% phentobarbital chloride in approximately 6 wks after surgery. Liver samples were collected and stored at -80°C refrigerator.