Researchers from the Karolinska Institute have mapped cells that form the brain’s blood vessels and blood brain barrier.

"It was long thought that the blood-brain barrier was made up of specialised endothelial cells in the blood vessels; the new study shows, however, that there are probably many other types of cells involved in the maintenance of the blood-brain barrier as well, including cells called pericytes in the capillary walls. The researchers were also able to establish the molecular identity of another cell type in the vascular wall, a kind of connective tissue cell located in a narrow space just outside the brain’s blood vessels."
http://neurosciencenews.com/neurology-brain-blood-vessels-8494/

Researchers have mapped cells that form the brain's blood vessels and blood brain barrier.