A single dose reversed autism-like symptoms in adult mice within hours
Science Daily · 2026-07-25
In a study published in Nature Communications on July 25, 2026, UCLA scientists demonstrated that a single dose of rapamycin rapidly reversed autism-like brain and behavioral symptoms in adult mice within hours. The mice had developed persistent inflammation, mild brain overgrowth, excessive mTOR pathway signaling, and impaired brain communication due to mild inflammatory exposure during their mothers' pregnancy. A single dose of rapamycin improved brain signaling, decreased seizure vulnerability, normalized sensory sensitivity and repetitive behaviors within approximately two hours. This rapid response suggests that the drug primarily modified brain function, particularly by rebalancing neuronal excitability and gene expression in excitatory neurons, rather than altering underlying brain structure. While the benefits were temporary and rapamycin has potential toxicity, making it unsuitable for human treatment, the study indicates that the adult brain affected by early developmental issues remains more adaptable than previously assumed. This discovery points to functional circuitry as a key target for future, safer therapies for autism-related symptoms.
*The full article also explores the specific mechanisms by which rapamycin influences gene activity and the implications for developing more targeted treatments for sensory over-responsivity.*