Restoring brain barriers: an innovative approach for treating neurological disorders.

The complex etiology of neurological disorders is a major challenge to the identification of therapeutic candidates. Tackling brain vascular dysfunction is gaining attention from the scientific community, neurologists and pharmaceutical companies, as a novel disease-modifying strategy. Here, we provide evidence that at least 41% of neurological diseases and related conditions/injuries display a co-pathology of blood-brain and blood-spinal cord barrier alterations and dysfunctions, and we discuss why this figure may represent only a fraction of a larger phenomenon. We further provide clinical evidence that barrier status may contribute to pathological and functional outcomes in patients. Finally, we discuss drug candidates under development to repair brain barriers.