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(a) Gene expression analysis of GBM10 and GBM12 cells encapsulated in GelMA/HAMA hydrogel gradients at 48 h. Fold change is normalized to section 1. GAPDH is used as housekeeping gene. (b) Metabolic activity (MTT) of GBM cells over time with increasing concentrations of hyaluronic acid. Data are normalized to MTT value after seeding (day 0). *P < 0.05 compared with section 1.
