CXCR4 and glioblastoma: To evaluate the binding specificity of the 89Zr-CXCR4-mAb in vitro, uptake assays were carried out in glioblastoma (U87-stb-CXCR4, U87), NSCLC (H1155, A549) and TNBC (SUM149 and MDA-MB-231) cell lines.