CASP3 and glioblastoma: Our in vitro study shows that Q‐PAC: (i) reduces proliferation, migration, invasion, GSH levels and viability of GBM cells; (ii) increases caspase 3/7‐mediated apoptosis, intracellular oxidative stress and H3K4 mono‐ and dimethylation; and (iii) shows a higher potency against GBM cells than healthy astrocytes.