Maybe it is possible to protect the BBB

[frodo]

This is a recently published article about the BBB breakdown. It is still too early to know whether it is important, but I think it is worthy to have it around here.

http://www.ncbi.nlm.nih.gov/pubmed/25535736

Interleukin-34 Restores Blood-Brain Barrier Integrity by Upregulating Tight Junction Proteins in Endothelial Cells.

Abstract
Interleukin-34 (IL-34) is a newly discovered cytokine as an additional ligand for colony stimulating factor-1 receptor (CSF1R), and its functions are expected to overlap with colony stimulating factor-1/macrophage-colony stimulating factor. We have previously shown that the IL-34 is primarily produced by neurons in the central nervous system (CNS) and induces proliferation and neuroprotective properties of microglia which express CSF1R. However, the functions of IL-34 in the CNS are still elucidative. Here we show that CNS capillary endothelial cells also express CSF1R. IL-34 protected blood-brain barrier integrity by restored expression levels of tight junction proteins, which were downregulated by pro-inflammatory cytokines. The novel function of IL-34 on the blood-brain barrier may give us a clue for new therapeutic strategies in neuroinflammatory and neurodegenerative diseases such as multiple sclerosis and Alzheimer's disease.

[CureOrBust]

Its a pity we couldn't get to the full article, I would b e very interested to see their methods.