CX3CL1 and lung adenocarcinoma: We also found the substantial expression of several chemokines (CXCL1, CXCL5, CXCL8, and CX3CL1) related to cell migration, invasion, metastasis, or EMT [27–30], in KRAS-mutant lung adenocarcinoma cell lines, which was also dependent on MAPK signaling (unpublished data).