 This study investigates the differences between two different strains of mice with a myotrophic lateral sclerosis, ALS. The researchers found that one strain had a slower progression rate than the other which was attributed to the ability of the slower progressing strain to maintain muscle mass and function despite nerve damage. They also discovered that this effect was due to the presence of certain molecules in the muscles of the slower progressing strain which helped to promote regeneration of the muscle tissue. These results suggest that understanding the differences between these two strains could lead to better treatments for ALS. This article was authored by Cassandra Margotta, Power for Brisio, Marcos Acanti, and others.