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Supplementing a single protein found in the spinal cord could help prevent symptoms of Lou Gehrig’s disease, according to a new study. Researchers found high levels of the protein — called mitofusion 2 or Mfn2 — prevented nerve degeneration, muscle atrophy, and paralysis in a mouse model of the disease. Since Mfn2 is often depleted during Lou Gehrig’s, the new study suggests supplementing it could be a novel therapeutic approach for the disease.