Process
Crossing The blood–brain barrier
Crossing the blood–brain barrier
A delivery challenge because many therapeutic proteins and other large molecules do not readily enter the brain from blood.
Overview
EXPLORE BY LEVELThe brain has a protective barrier that keeps many substances in the blood from entering. That protection can also make it hard for a medicine to reach brain cells.
Quick Facts
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Research Claims
CNS exposure depends on molecular properties, transporter engagement, disease state, and barrier integrity. A delivery strategy must demonstrate target-tissue exposure and pharmacologic activity, not just blood concentration.