B16F10 or 4T1 cells (1 × 106 cells per well) were seeded in 6-well culture plates incubated for 24 h at 37°C, 5% CO2. Then, the cells were either transfected with 5 μg pCDNA 3.1 control plasmid or constitutively active AKT plasmid (Provided by Dr. Chiau-Yuang Tsai of the Department of Molecular Immunology, Osaka University, Japan) using Lipofectamine 2000 18 (link), 19 and then incubated for another 24 h at 37°C, 5% CO2. Afterwards, the cells were washed and treated with hinokitiol (Sigma Aldrich, St. Louis, MO, USA) for 16 h and prepared for Western blotting.
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