| ALS | amyotrophic lateral sclerosis |
| SOD1 | superoxide dismutase type 1 |
| C9orf72 | chromosome 9 open reading frame 72 |
| TDP-43 | TAR DNA-binding protein 43 |
| CNS | central nervous system |
| PNS | peripheral nervous system |
| TGFB | transforming growth factor beta |
| TGFBRI | TGFB type I receptor |
| TGFBRII | TGFB type II receptor |
| SMAD | small mother against decapentaplegic |
| SBE | SMAD binding element |