Researchers at Scripps Research have discovered a molecular mechanism that appears to drive the chronic brain inflammation characteristic of Alzheimer’s disease. The team found that a protein known as STING undergoes a chemical modification that locks the brain’s immune cells into a persistent state of overactivation.
This sustained immune response damages synapses—the connections between nerve cells—offering a new target for potential therapies. The finding provides a clearer picture of why inflammation persists in Alzheimer’s brains, a puzzle that has long frustrated scientists.
According to the study published in ScienceDaily, the alteration of STING acts as a hidden switch fueling neuroinflammation. The researchers have not yet specified the exact chemical change or how it might be reversed, but the discovery opens a new avenue for drug development.
If future therapies can modulate this STING-related switch, they might reduce brain inflammation and slow cognitive decline. However, the work is still in early stages, and no human trials have been announced.
The study adds to a growing body of research linking immune dysfunction to neurodegenerative diseases, though experts caution that targeting a single protein may not be sufficient to treat Alzheimer’s complex pathology.