US scientists say they have successfully reversed the effects of Alzheimer's with experimental drugs.
The drugs target and boost the function of a newly pinpointed gene involved in the brain's memory formation.
In mice, the treatment helped restore long-term memory and improve learning for new tasks, Nature reports.
The same drugs - HDAC inhibitors - are currently being tested to treat Huntington's disease and are on the market to treat some cancers.
They reshape the DNA scaffolding that supports and controls the expression of genes in the brain.