ADCYAP1 and neuroblastoma: The neuroprotective effect of PACAP was evaluated using the Prestoblue assay on 2D SH-SY5Y neuroblastoma cells, differentiated into DAn (SH-SY5Y/RA) and treated with the neurodegenerative agent, MPP+ (0.5 mM, 1 mM, and 1.5 mM).