DNA Differences Add Risk: Altered genes show up in Lou Gehrig’s disease

Scientists’ best efforts have failed to vanquish amyotrophic lateral sclerosis (ALS). There was no cure for the nerve-degenerating disease when it struck down baseball star Lou Gehrig 64 years ago, and there is none today. In fact, scientists have yet to pinpoint a cause of the disease except in individuals with certain rare genetic mutations.