CXCR4 and non-small cell lung carcinoma: In addition, in line with the reports that have positively correlated Cxcr4 expression with NSCLC cell migration26,27, we observed significantly higher expression of Cxcr4 in migrating population, containing higher number of CSCs (Fig. 1C,D), than the non-migrating one of A549 cells (Fig. 1I left panel).