Brain Killer Or Bystander
Most Alzheimer’s disease isn’t hereditary; the key risk factor is age, not family history. But if inherited genes can cause the illness, even in rare cases, then zeroing in on those genes should offer general insights into the disease process. The idea that a defective APP gene might cause Alzheimer’s dates back to 1987, when researchers made a pair of tantalizing findings. One team discovered the APP gene on the 21st chromosome....