This aligns with previous studies showing that pericytes, upon contact from GBM cells, increased the production of anti‐inflammatory cytokines IL‐10 and TGF‐β and secretion of other immunosuppressive factors and interleukins connected to metastasis [22, 112, 113], together with a reduction of CD80, CD86, and MHC‐II expression. Here, TGFB1 is linked to glioblastoma.