Among them, CTS can boost the expression of certain genes, such as superoxide dismutase 1 (SOD1), peroxiredoxin 1 (PRX1), peroxiredoxin 5 (PRX5), glutathione peroxidase (GPX1) and NAD(P)H quinone dehydrogenase 1 (NQO1) in PD-hiNPCs (Lee et al., 2020). Here, NQO1 is linked to Parkinson disease.