SMN2 and amyotrophic lateral sclerosis: More interestingly, the investigators found that co-injection of Stasimon mRNA with smn-MO reverted the typical motor axon abnormalities found in Smn-deficient zebrafish but not in amyotrophic lateral sclerosis (ALS) zebrafish model, indicating that these results could be specific for the SMA zebrafish model [42].