Gene Variant Triples Alzheimer's Risk, Study Finds

• A gene variant called APOE4 triples the risk of late-onset Alzheimer's disease.
• Fat buildup in brain cells may be linked to the increased risk caused by APOE4.
• Scientists have identified a rare mutation that protects some individuals with high genetic risk from Alzheimer's.
• The discovery could lead to new treatments that mimic this natural defense mechanism.
• The study focuses on the role of amyloid-beta and tau proteins in Alzheimer's disease.