MMP2 and glioblastoma: Expression of MMP2 was higher in GBM cells cultured in the presence of cortical cells than the GBM cells without cortical cells (24.2 [20.2, 28.4] a.u. and 21.4 [18.6, 24.5] a.u., respectively, KS test p < 10–8) (Figures 6C–E).