Moreover, the expansion of tumor-reactive lymphocytes (tr-TILs) from patient samples has shown promise for personalized cell therapy, with a notable expansion rate of 54% in a cohort of patients (ref: Maffezzini doi.org/10.1038/s41467-025-62263-2/). This highlights the potential for harnessing the immune system to combat GBM. In contrast, targeting the TGF-β docking receptor GARP using a chimeric antigen receptor (CAR)-T cell platform has emerged as a novel therapeutic approach, correlating GARP expression with clinical outcomes in glioma patients (ref: Wu doi.org/10.1093/neuonc/). Collectively, these studies illustrate the multifaceted interactions within the TME and their implications for developing effective immunotherapies against GBM.