ASCL1 and Parkinson disease: Using a different set of transcription factors (Ascl1, Pitx3, Lmx1a, and Nurr1) and in combination with electromagnetic gold nanoparticles (AuNPs) and the presence of specific electromagnetic fields, Yoo et al. (2017) reported that dopaminergic neurons could be converted from resident striatal astrocytes in MPTP- or 6-OHDA-induced PD mouse models.