YBX1 and lung adenocarcinoma: To investigate whether YB-1 expression correlates with lung adenocarcinoma progression, the stable YB-1-silenced A549 cells (shYB1-1, shYB1-2) and H1299 cells (shYB1-3, shYB1-4) were generated using two shRNA expressing plasmids (Supplementary Figure 1).