CXCL16 and glioblastoma: Moreover, the expression of only a few of the entire profile of chemokines expressed in GBM tumors was preserved in spherical cultures (mainly CCL2, CX3CL1, CXCL16, CXCL11, CXCL10, CXCL12, CXCL26, CXCL2, and CXCL14, Figure 3b).