Furthermore, we confirmed the variation in FOXS1 expression at the mRNA and protein levels in glioma cells (both in the U87MG cell line and in GBM-1 primary glioblastoma cells) when glioma cells were cultured in conditioned media of gaMSCs for 3 days (Fig. 2B–D). This evidence concerns the gene FOXS1 and glioblastoma.