PMID- 34834200 OWN - NLM STAT- PubMed-not-MEDLINE LR - 20211129 IS - 1999-4923 (Print) IS - 1999-4923 (Electronic) IS - 1999-4923 (Linking) VI - 13 IP - 11 DP - 2021 Oct 26 TI - Blood-Brain Barrier Dysfunction in CNS Disorders and Putative Therapeutic Targets: An Overview. LID - 10.3390/pharmaceutics13111779 [doi] LID - 1779 AB - The blood-brain barrier (BBB) is a fundamental component of the central nervous system (CNS). Its functional and structural integrity is vital to maintain the homeostasis of the brain microenvironment by controlling the passage of substances and regulating the trafficking of immune cells between the blood and the brain. The BBB is primarily composed of highly specialized microvascular endothelial cells. These cells' special features and physiological properties are acquired and maintained through the concerted effort of hemodynamic and cellular cues from the surrounding environment. This complex multicellular system, comprising endothelial cells, astrocytes, pericytes, and neurons, is known as the neurovascular unit (NVU). The BBB strictly controls the transport of nutrients and metabolites into brain parenchyma through a tightly regulated transport system while limiting the access of potentially harmful substances via efflux transcytosis and metabolic mechanisms. Not surprisingly, a disruption of the BBB has been associated with the onset and/or progression of major neurological disorders. Although the association between disease and BBB disruption is clear, its nature is not always evident, specifically with regard to whether an impaired BBB function results from the pathological condition or whether the BBB damage is the primary pathogenic factor prodromal to the onset of the disease. In either case, repairing the barrier could be a viable option for treating and/or reducing the effects of CNS disorders. In this review, we describe the fundamental structure and function of the BBB in both healthy and altered/diseased conditions. Additionally, we provide an overview of the potential therapeutic targets that could be leveraged to restore the integrity of the BBB concomitant to the treatment of these brain disorders. FAU - Archie, Sabrina Rahman AU - Archie SR AD - Department of Pharmaceutical Sciences, Texas Tech University Health Sciences Center, Amarillo, TX 79106, USA. FAU - Al Shoyaib, Abdullah AU - Al Shoyaib A AD - Department of Pharmaceutical Sciences, Texas Tech University Health Sciences Center, Amarillo, TX 79106, USA. FAU - Cucullo, Luca AU - Cucullo L AUID- ORCID: 0000-0002-2827-7162 AD - Department of Foundational Medical Studies, Oakland University William Beaumont School of Medicine, Rochester, MI 48309, USA. LA - eng GR - 2R01DA029121/DA/NIDA NIH HHS/United States GR - 1R01DA049737/DA/NIDA NIH HHS/United States GR - 1R01NS117906/NS/NINDS NIH HHS/United States PT - Journal Article PT - Review DEP - 20211026 PL - Switzerland TA - Pharmaceutics JT - Pharmaceutics JID - 101534003 PMC - PMC8622070 OTO - NOTNLM OT - biological barriers OT - dysfunction OT - endothelial OT - stroke OT - therapeutic targets OT - tight junctions OT - viability COIS- The authors declare no conflict of interest. EDAT- 2021/11/28 06:00 MHDA- 2021/11/28 06:01 PMCR- 2021/10/26 CRDT- 2021/11/27 01:24 PHST- 2021/09/23 00:00 [received] PHST- 2021/10/15 00:00 [revised] PHST- 2021/10/20 00:00 [accepted] PHST- 2021/11/27 01:24 [entrez] PHST- 2021/11/28 06:00 [pubmed] PHST- 2021/11/28 06:01 [medline] PHST- 2021/10/26 00:00 [pmc-release] AID - pharmaceutics13111779 [pii] AID - pharmaceutics-13-01779 [pii] AID - 10.3390/pharmaceutics13111779 [doi] PST - epublish SO - Pharmaceutics. 2021 Oct 26;13(11):1779. doi: 10.3390/pharmaceutics13111779.