MAPK3 and neuroblastoma: Preconditioning with blueberry polyphenols was found to protect neuroblastoma cells from H2O2-induced cell injury by activation of PI3K/Akt, MAPK, p38 (p-38 mitogen-activated protein kinase), and the activity loss of ERK1/2 (extracellular signal-regulated kinase 1/2) and MEK1/2 (mitogen-activated extracellular kinase 1/2) [65].