A newly discovered enzyme called IDOL could be the key to stopping Alzheimer’s disease. When researchers removed it from neurons, amyloid plaques — the toxic clumps that define Alzheimer’s — dramatically decreased.
The discovery adds a crucial missing piece to the Alzheimer’s puzzle. For years, scientists have focused on clearing amyloid plaques after they form. But the IDOL enzyme appears to control how and why those plaques accumulate in the first place.
How IDOL drives Alzheimer’s
IDOL is involved in cholesterol metabolism in brain cells. When it’s overactive, it degrades receptors that help neurons clear toxic proteins. The result: a molecular traffic jam that lets amyloid beta build up unchecked.
Researchers found that genetically deleting IDOL in mouse models led to:
- Sharp reduction in amyloid plaques
- Improved memory and cognitive function
- Healthier synapses (connections between neurons)
«This is a completely new angle. Instead of attacking plaques directly, we’re addressing why the brain stops clearing them,» said the lead author.
Drug companies are already exploring IDOL inhibitors as a potential treatment pathway.
Based on research published May 20, 2026.
