In addition, we also identified decreased levels of BDNF, in SOD1-ALS MNs, which is a key growth factor required for the cell growth/neuronal survival in the brain, whereas reduced expression has been associated with neuronal dysfunction and death in several neurological disorders including ALS (Alvia et al., 2022; Lanuza et al., 2019). The gene discussed is SOD1; the disease is nervous system disorder.