Researchers have identified a specific gene as the focal point for developing new Alzheimer’s treatments. The Apoe gene variants could be key to preventing most cases of the disease, according to scientists at UCL who analyzed extensive medical records.
Current Alzheimer’s medications work by clearing toxic proteins from the brain, yet their effectiveness remains limited. These existing drugs provide only modest benefits and have not received approval for widespread use in the UK. This gap in treatment effectiveness has prompted the scientific community to explore alternative approaches.
The UCL team examined data from over 450,000 individuals of European descent to assess how different Apoe gene variants contribute to Alzheimer’s risk. Three main variants exist: Apoe2, Apoe3, and Apoe4. People inherit two copies, one from each parent. Traditionally, Apoe4 was considered high-risk, Apoe3 neutral, and Apoe2 protective.
The research presents a different perspective. When compared with individuals carrying two Apoe2 copies, both Apoe3 and Apoe4 increase Alzheimer’s risk. Between 72% to 93% of Alzheimer’s cases could be prevented if these variants’ harmful effects were neutralized, the researchers calculated. This suggests targeting these variants could offer substantial disease prevention potential.
Alzheimer’s affects over 500,000 people in the UK and more than 40 million globally. Multiple genetic factors and lifestyle elements contribute to disease development. Smoking, obesity, diabetes, high blood pressure, and elevated cholesterol all increase susceptibility.
However, practical obstacles complicate treatment development. The Apoe gene functions critically in moving cholesterol and fats throughout the body and brain. Completely eliminating the gene could cause serious problems. Additionally, over 99% of the population carries either Apoe3 or Apoe4, meaning population-wide treatment would be necessary.
Experts offered varying assessments of the findings. One genetics professor compared the claim to suggesting most road deaths wouldn’t occur without cars, questioning whether gene variants warrant such emphasis. Conversely, other researchers emphasized that understanding Apoe’s role remains essential for developing prevention and treatment strategies moving forward.
