BSN and Parkinson disease: The BSN protein and BSN gene were reported to be associated with multiple system atrophy (Hashida et al., 1998), Parkinson’s disease (PD; Andrews and Kukkle, 2023), Huntington’s disease (Huang et al., 2020), schizophrenia, bipolar disorder (Chen and Huang, 2021), multiple sclerosis (Schattling and Engler, 2019) and epilepsy (Ye et al., 2023).