Health

Columbia researchers identify rare FN1 mutation linked to Alzheimer's protection

ScienceDaily reports that Columbia University researchers linked a rare fibronectin mutation to protection in some APOE ε4 carriers.

Updated Oct 19, 2026 · 14:20 UTC1 reports

The short version

ScienceDaily reports that Columbia University researchers found some APOE ε4 carriers also carry a rare protective FN1 mutation.[ScienceDaily]
In mice engineered with human APOE ε4, brain fibronectin measured nearly twice the level seen in APOE ε3 mice.[ScienceDaily]
Approximately one in five people carries at least one copy of the APOE ε4 variant.[ScienceDaily]
Next steps are unclear, and the reporting describes any treatment path as potential rather than established.[ScienceDaily]

Some people who carry the APOE ε4 variant also carry a rare protective mutation in the FN1 gene, according to Columbia University researchers.[ScienceDaily]
In mice engineered with human APOE ε4, brain fibronectin was measured at nearly twice the level seen in APOE ε3 mice.[ScienceDaily]
About one in five people carries at least one copy of the APOE ε4 variant.[ScienceDaily]

Whether the mechanism applies to people and leads to treatments is unresolved; the reporting describes treatment paths only as potential.[ScienceDaily]
The mouse fibronectin comparison may not fully reflect human brain biology.[ScienceDaily]

Outlet counts describe coverage, not independent confirmation. Reports may share a wire service or original source.