PDGFB and glioblastoma: TGFβ promotes cell proliferation in GBM, inducing the expression of platelet‐derived growth factor‐B (PDGFB) [18, 19], nodal [20] and the activation of (nuclear factor of κ light polypeptide gene enhancer in B‐cells) NF‐κB through miR‐182 [21].