How Down syndrome may help unravel Alzheimer's puzzle - NBC News.com

How Down syndrome may help unravel Alzheimer's puzzle - NBC News.com: Scientists have known for decades that people with Down syndrome were at increased risk of developing Alzheimer’s disease, but they didn’t know why. Some researchers now believe that understanding the connection between the two conditions might help us unravel the Alzheimer’s puzzle and point towards therapies that might slow, or even halt, the dreaded disease.