Five million Americans are living with alzheimer's disease.
Researchers expect that number of triple by 2050.
There are drugs to treat the symptoms, but none proven to treat the cause.
Louise and Jim Arnold have been through a lot in their marriage, but nothing worse than when Jim was diagnosed with alzheimer's.
He volunteered for a clinical study to test a new treatment that could stop the disease. "It could very well be the first drug to market that actually changes the progress of the disease," explains Dr. Adam Fleisher. "We are not focusing on stopping the disease itself and that's very exciting."
That drug is ly450139.
Unlike current therapies, it targets the cause.
Proteins cause plaques to form in the brain, damaging neurons.
Scientists are hopeful the drug will stop plaques from ever forming, so the brain stays healthy.