CXCL16 and glioblastoma: To investigate whether CXCL16/CXCR6 also modulates cell migration, invasion and proliferation in human GBM, we isolated tumor cells from patient's derived biopsies (GBM 13, 19, 40, 45) and analyzed their expression of CXCL16 and CXCR6 by RT-qPCR.