Cited by 313Barrier Structure and Function StudiesDrug Transport and Resistance MechanismsAngiogenesis and VEGF in Cancer

Novel insights into the development and maintenance of the blood-brain barrier

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Engelhardt, Britta, Liebner, Stefan·2014·Cell and Tissue Research

Abstract

The blood-brain barrier (BBB) is essential for maintaining homeostasis within the central nervous system (CNS) and is a prerequisite for proper neuronal function. The BBB is localized to microvascular endothelial cells that strictly control the passage of metabolites into and out of the CNS. Complex and continuous tight junctions and lack of fenestrae combined with low pinocytotic activity make the BBB endothelium a tight barrier for water soluble moleucles. In combination with its expression of specific enzymes and transport molecules, the BBB endothelium is unique and distinguishable from all other endothelial cells in the body. During embryonic development, the CNS is vascularized by angiogenic sprouting from vascular networks originating outside of the CNS in a precise spatio-temporal manner. The particular barrier characteristics of BBB endothelial cells are induced during CNS angiogenesis by cross-talk with cellular and acellular elements within the developing CNS. In this review, we summarize the currently known cellular and molecular mechanisms mediating brain angiogenesis and introduce more recently discovered CNS-specific pathways (Wnt/β-catenin, Norrin/Frizzled4 and hedgehog) and molecules (GPR124) that are crucial in BBB differentiation and maturation. Finally, based on observations that BBB dysfunction is associated with many human diseases such as multiple sclerosis, stroke and brain tumors, we discuss recent insights into the molecular mechanisms involved in maintaining barrier characteristics in the mature BBB endothelium.

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  • Bacterial products and metabolites can pass the blood-brain barrier and shape CNS development and functions and the genesis of certain diseases.

    “Among the molecules that can pass the BBB are also bacterial products and metabolites shaping not only the CNS development and functions (6, 15) but also the genesis of certain diseases (33–42).”

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Authors
Engelhardt, B., & Liebner, S.
Affiliations
  • University of Bern (CH)
  • University Hospital Frankfurt (DE)
Corresponding author
  • Engelhardt, Britta
  • Liebner, Stefan
Venue
Cell and Tissue Research
Published
2014-03
Volume
355
Issue
3
Pages
687-699
ISSN
  • 0302-766X (ISSN-L)
  • 1432-0878
OpenAlex
W2055823942
Cited by
313
References
111
Citations by year
2026: 20 · 2025: 19 · 2024: 23 · 2023: 21 · 2022: 24 · 2021: 35 · 2020: 30 · 2019: 35 · 2018: 24 · 2017: 22 · 2016: 20 · 2015: 26 · 2014: 13 · 2012: 1
FWCI
2.19
Type
journal article
Language
en
Open access
Locations
  • Cell and Tissue Research (publishedVersion, cc-by)
  • Europe PMC (PubMed Central) (publishedVersion, cc-by)
  • PubMed Central (publishedVersion, cc-by)
  • PubMed (publishedVersion)
  • reroDoc Digital Library (submittedVersion)
  • BORIS (University Library Bern) (submittedVersion, cc-by)
  • Open Access CRIS of the University of Bern
Funders
European Commission (241861)
Topics
  • Life Sciences › Neuroscience › Neurology › Barrier Structure and Function Studies
  • Health Sciences › Medicine › Oncology › Drug Transport and Resistance Mechanisms
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Angiogenesis and VEGF in Cancer
Keywords
blood-brain barrier, tight junctions, Wnt/β-catenin signaling, Hedgehog signaling, GPR124, BBB dysfunction, multiple sclerosis, stroke, brain tumors, endothelial differentiation
MeSH terms
Animals, Blood-Brain Barrier, Cell Differentiation, Humans, Signal Transduction, Tight Junctions, beta Catenin, Wnt Signaling Pathway

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