GSK-3β Inhibitor Alsterpaullone Attenuates MPP+ -Induced Cell Damage in a c-Myc-Dependent Manner in SH-SY5Y Cells. Alzforum, 28 Sep 2018 . GSK-3β Inhibitor Alsterpaullone Attenuates MPP+ -Induced Cell Damage in a c-Myc-Dependent Manner in SH-SY5Y Cells.