Endothelial β-Catenin Signaling Is Required for Maintaining Adult Blood–Brain Barrier Integrity and Central Nervous System Homeostasis
Open accessAbstract
Background—: The blood–brain barrier (BBB) formed by brain endothelial cells interconnected by tight junctions is essential for the homeostasis of the central nervous system. Although studies have shown the importance of various signaling molecules in BBB formation during development, little is known about the molecular basis regulating the integrity of the adult BBB. Methods and Results—: Using a mouse model with tamoxifen-inducible endothelial cell–restricted disruption of ctnnb1 ( iCKO ), we show here that endothelial β-catenin signaling is essential for maintaining BBB integrity and central nervous system homeostasis in adult mice. The iCKO mice developed severe seizures accompanied by neuronal injury, multiple brain petechial hemorrhages, and central nervous system inflammation, and all had postictal death. Disruption of endothelial β-catenin induced BBB breakdown and downregulation of the specific tight junction proteins claudin-1 and -3 in adult brain endothelial cells. The clinical relevance of the data is indicated by the observation of decreased expression of claudin-1 and nuclear β-catenin in brain endothelial cells of hemorrhagic lesions of hemorrhagic stroke patients. Conclusions—: These results demonstrate the prerequisite role of endothelial β-catenin in maintaining the integrity of adult BBB. The results suggest that BBB dysfunction secondary to defective β-catenin transcription activity is a key pathogenic factor in hemorrhagic stroke, seizure activity, and central nervous system inflammation.
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Wnt/β-catenin signaling is a pathway critical for BBB maintenance via regulation of tight junction proteins such as claudin-1.
“These effects may be linked to APOE3Ch cargo, consistent with activation of Wnt/β‐catenin signaling in endothelial cells, 8 a pathway critical for BBB maintenance via regulation of tight junction proteins such as claudin‐1. 65 , 66”
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- Authors
- Tran, K. A., Zhang, X., Predescu, D., Huang, X., Machado, R. F., Göthert, J. R., Malik, A. B., Valyi-Nagy, T., & Zhao, Y.-Y.
- Affiliations
- University of Illinois Chicago (US)
- From Department of Pharmacology (K.A.T., X.Z., X.H., A.B.M., Y.Y.Z), Center for Lung and Vascular Biology (K.A.T., X.Z., X.H., A.B.M., Y.Y.Z), Department of Medicine (R.F.M.), and Department of Pathology (T.V.-N.), University of Illinois College of Medicine, Chicago; Department of Pharmacology, Rush University, Chicago, IL (D.P.); and Department of Hematology, West German Cancer Center, University Hospital Essen, Essen, Germany (J.R.G.).
- ORCID
- Venue
- Circulation
- Published
- 2016-01-12
- Volume
- 133
- Issue
- 2
- Pages
- 177-186
- ISSN
- 0009-7322 (ISSN-L)
- 1524-4539
- PMC
- PMC4814374
- OpenAlex
- W2237670736
- Cited by
- 219
- References
- 5
- Citations by year
- 2026: 14 · 2025: 28 · 2024: 17 · 2023: 32 · 2022: 27 · 2021: 27 · 2020: 18 · 2019: 22 · 2018: 14 · 2017: 16 · 2016: 4
- FWCI
- 6.04
- Type
- journal article
- Language
- en
- Open access
- green
- www.ncbi.nlm.nih.gov
- Locations
- Circulation (publishedVersion)
- PubMed (publishedVersion)
- PubMed Central (acceptedVersion)
- Universitätsbibliographie, Universität Duisburg-Essen (submittedVersion)
- Funders
- National Heart, Lung, and Blood Institute (R01HL085462, R56HL085462, P01HL060678, R01HL125350, P01HL077806, R01HL123957, T32HL007829, R01HL111656)
- Topics
- Life Sciences › Neuroscience › Neurology › Barrier Structure and Function Studies
- Health Sciences › Medicine › Immunology and Allergy › Cell Adhesion Molecules Research
- Health Sciences › Medicine › Oncology › Drug Transport and Resistance Mechanisms
- Keywords
- blood-brain barrier integrity, brain endothelial cells, tight junction proteins, claudin-1, claudin-3, hemorrhagic stroke, seizures, neuroinflammation
- MeSH terms
- Adult, Aged, Animals, Ataxia, Basal Ganglia, Blood-Brain Barrier, Brain, Cerebral Hemorrhage, Crosses, Genetic, Female, Gene Expression Regulation, Homeostasis, Humans, Hyperesthesia, Inflammation, Male, Mice, Transgenic, Middle Aged, Organ Specificity, Seizures, Down-Regulation, Cytokines, Genes, Reporter, Transgenes, Tight Junctions, RNA Interference, Endothelial Cells, beta Catenin, Mice, Gene Knockdown Techniques, Claudin-1, Claudin-3
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