A new study just flipped what we thought about the blood-brain barrier (BBB). Instead of being just a wall, it turns out the BBB actually selects which proteins get into our brains, some of which are linked to Alzheimer's.
Researchers at Gladstone Institute tracked hundreds of proteins in mice and found that key ones from the liver, like APOA1 and AAT, play a big role in nerve health and immune response.
In mice showing Alzheimer's signs, there was less APOA1 and more AAT getting into their brains.
APOA1 gene therapy helps Alzheimer's mice
Here's where it gets interesting: when scientists used gene therapy to boost APOA1 levels from the liver, mice with Alzheimer's-like symptoms improved.
It's an early finding (what works in mice doesn't always work in humans), but it could point toward new ways to treat Alzheimer's down the line.