(A–B) LC3B immunohistochemistry of LNT-229 cells cultured in serum-free medium (A) with 25 mM glucose and (B) without glucose (scale bar: 50 μm). (C) Percentage of LC3B positive cells in immunocytochemistry of cell culture conditions with 0 (min: 2, max: 51, median: 20) and 25 mM glucose (min: 0, max: 13, median: 3) from 28 differently treated LNT-229 cytopellets. (D) LC3B punctae per 100 cells in immunocytochemistry of cell culture conditions with 0 (min: 2, max: 240, median: 100.5) and 25 mM glucose (min: 0, max: 17, median: 4.5) from 28 differently treated LNT-229 cytopellets. Different treatment options: see Supplementery Table S1. (E, F) Correlation of Glut1 (1 = weak, 2 = moderate, 3 = strong) expression and (E) LC3B-positive cells or (F) LC3B-positive punctae per 100 cells in 28 differently treated LNT-229 cell culture experiments. (G) Immunoblotting of LNT-229 cells cultured in serum-free medium at different oxygen, glucose or amino acid (arginin, lysine, L-glutamine) levels.