Glut1 specific siRNA (catalogue no. sc-35,493; Santa Cruz Biotechnology, Inc.) was transfected into MCF-7 cells by Lipofectamine® 2000 (Invitrogen; Thermo Fisher Scientific, Inc.) according to the manufacturer's protocol. Scrambled siRNA (catalogue no. sc-37,007; Santa Cruz Biotechnology, Inc.) was used as a negative control. Reduced serum medium was changed into complete medium 6 h subsequent to transfection. Cells were harvested 48 h subsequent to transfection, and then used for additional experiments.
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