CREB1 and neoplasm: KYSE150‐Luc‐CREB1‐KO cells and those further re‐overexpressed with wild‐type and mutant CREB1, respectively, designated as KYSE150‐Luc‐CREB1‐KO/CREB1 WT and KYSE150‐Luc‐CREB1‐KO/CREB1 Mut, as well as parental cells KYSE150‐Luc as control, were intravenously injected into nude mice to establish tumor metastasis.