RKO, T-47D, and A549 cells were maintained in DMEM (Sigma-Aldrich) supplemented with 10% fetal calf serum (Sigma-Aldrich), 2 mM glutamine (Biological Industries (BI)), 1 mM sodium pyruvate (BI), 1× nonessential amino acids (BI), 100 U/ml penicillin (BI), 0.1 mg/ml streptomycin (BI).
NK-92 cells were maintained in two different media: RPMI (Sigma-Aldrich) supplemented with 10% fetal calf serum (Sigma-Aldrich), 2 mM glutamine (Biological Industries (BI)), 1 mM sodium pyruvate (BI), 1× nonessential amino acids (BI), 100 U/ml penicillin (BI), 0.1 mg/ml streptomycin (BI), and 200U/ml IL-2 (PeproTech); or MEM-alpha (BI) supplemented with 12.5% fetal calf serum (Sigma-Aldrich), 12.5% Horse serum (BI), 2 mM glutamine (BI), 1 mM sodium pyruvate (BI), 1× nonessential amino acids (BI), 100 U/ml penicillin (BI), 0.1 mg/ml streptomycin (BI), 200 U/ml IL-2 (PeproTech), 0.2 mM myoinositol, 0.02 mM folic acid, 0.1mM beta-mercaptoethanol, 0.2% Ribonucleosides and Deoxyribonucleosides for MEM-Alpha.