Juvenile-onset ALS linked to new SPTLC2 mutation: Study
A previously unknown mutation in the SPTLC2 gene was identified in two patients who developed juvenile-onset amyotrophic lateral sclerosis (ALS), a study reports. The mutation significantly increased the production of certain types of fat-like molecules called sphingolipids, resulting in early-onset muscle weakness, progressive motor impairment, and involuntary tongue movements.