part of maintenance of blood-brain barrier regulation of vascular permeability regulation of blood-brain barrier permeability 2016-10-26T13:18:16Z regulation of blood/brain barrier permeability Any process that modulates blood-brain barrier permeability, the quality of the blood-brain barrier that allows for a controlled passage of substances (e.g. macromolecules, small molecules, ions) into and out of the brain. biological_process GO:1905603 als regulation of BBB permeability