Deleting a single gene in the cerebellum of mice can cause key autistic-like symptoms, researchers have found. They also discovered that rapamycin, a commonly used immunosuppressant drug, prevented these symptoms. The deleted gene is associated with Tuberous Sclerosis Complex (TSC), a rare genetic condition. Since nearly 50 percent of all people with TSC develop autism, the researchers believe their findings will help us better understand the condition’s development.