PCa cells seeded in 100-mm cell culture dishes were treated with Etn for different time points. After treatment, cells were subjected to immunoblotting as described previously 33 (link). Lysates from fresh tumor samples were prepared using BeadBlaster microtube homogenizer (LabRepCo) following the manufacturer's guidelines. Proteins were separated by sodium dodecyl sulfate-polyacrylamide gel electrophoresis (SDS-PAGE) and then were transferred onto polyvinylidene difluoride (PVDF) membranes. Membranes were incubated with anti-light chain 3 primary antibody (LC3; Cell Signaling Technologies, #2775S, 1:500) or GLUT1 primary antibody (Abcam, #ab115730, 1:1000) overnight at 4 °C; anti-beta-actin primary antibody (Santa Cruz Biotechnology, #SC-47778, 1:1000) was used as a loading control. Subsequently, membranes were incubated with goat anti-mouse (Santa Cruz Biotechnology, #sc-516102, 1;8000) or goat anti-rabbit (Santa Cruz Biotechnology, #sc-2357, 1:8000) IgG horseradish peroxidase-conjugated secondary antibodies. All antibodies against pro-apoptotic proteins were from Pro-Apoptosis Bcl-2 Family Antibody Sampler Kit (Cell Signaling Technologies, #9942T). The signal was visualized using the Pierce ECL Western Blotting Substrate (Thermo Fisher Scientific, #32106). Signal intensities were quantified using ImageJ and were normalized to the respective β-actin signal intensity.
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