Therefore, the low‐secreting (MSC1; ~6 ng/mL) and medium‐secreting (MSC2; 115 ng/mL) cell lines were compared by assessing stromal cell‐derived factor‐1 (SDF‐1), a major component of the MSC migration axis to GBM.46, 47. This evidence concerns the gene CXCL12 and glioblastoma.