DKK1 and glioblastoma: Looking into the GO biological processes, the involvement of FZD7, DKK1, SOX2, CDH2, FN1, SNAI1, TWIST1, HIF1A, MMP1, MMP2, and MMP9 in the Wnt signalling pathway, mesenchyme development, and extracellular matrix disassembly corroborate their roles in the increased invasive capabilities of GBM cells.