Scientists at Israel’s Ben Gurion University have discovered that the protein SIRT6 is key to repairing DNA damage that causes neurodegenerative brain diseases. SIRT6 was almost completely absent in Alzheimer’s disease patients.

http://www.jpost.com/Business-and-Innovation/Health-and-Science/Israeli-scientists-find-likely-cause-of-neurodegenerative-diseases-490134

http://www.cell.com/cell-reports/abstract/S2211-1247(17)30325-X