Inclusions of misfolded SOD1 were found in IPSC-derived oligodendrocytes obtained from sporadic and familial cases of ALS carrying a SOD1 mutation but they were absent from oligodendrocytes of those carrying a C9orf72 repeat expansion (Ferraiuolo et al., 2016). This evidence concerns the gene C9orf72 and amyotrophic lateral sclerosis.