Longevity & AgingAPOE2 Gene Shields Neurons From DNA Damage and Brain Aging
Researchers at the Buck Institute have discovered that APOE2, the gene variant linked to exceptional longevity, may protect the brain by enhancing DNA repair and preventing neurons from entering a dysfunctional state called senescence. Using human stem cell-derived neurons and aged mice, the team found APOE2 neurons had fewer DNA strand breaks, stronger nuclear architecture, and lower levels of senescence markers compared to APOE4 neurons. This moves APOE2 beyond its known role in cholesterol handling, placing it within the broader machinery of cellular maintenance that geroscience research identifies as central to healthy aging. The findings suggest Alzheimer's risk may be partly a failure of neuronal upkeep, not just plaque accumulation.
