Additionally, TGF-β, a classical inductor of EMT processes, which is highly secreted by glioma cells, induced SLUG expression in HBVPs, in parallel with the induction of proliferation, cell motility, and alpha-smooth muscle cell actin (αSMA) expression, resulting in the activation of pericytes [7,8,29]. This evidence concerns the gene TGFB1 and central nervous system cancer.