Fig 1: The in vitro release behavior of neural inducers and biocompatibility of BGA@GelMA hydrogel. (A to C) The relative release profile of BDNF, GDNF, and cAMP of the BGA@GelMA hydrogel measured with ELISA kit, n = 3. (D) Schematic representation of 3D culture system via the BGA@GelMA and the Matrigel hydrogel. (E) Flow cytometry was used to detect APC of cell apoptosis. (F) Statistical diagram of apoptotic cell distribution, n = 3, ***p = 0.0005. (G) Quantitative analysis of live cells and dead cells per field in the live/dead assay, n = 3. (H) Representative live/dead images of hNPCs co-cultured with the BGA@GelMA hydrogels and the Matrigel hydrogels after 14 days.