CXCR4 and cancer: CXCR4 (chemokine receptor type 4) overexpression is closely related to the increasing cancer migration behavior and metastasis phenotype in BC.26 In this way, previous studies revealed the impact of miR-145, miR-203,27 miR-302a,28 and miR-193a16 on the inhibition of invasiveness and metastatic feature of BC cells.