Cited by 551Barrier Structure and Function StudiesDrug Transport and Resistance MechanismsCell Adhesion Molecules Research

Brain barriers: Crosstalk between complex tight junctions and adherens junctions

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Tietz, Silvia, Engelhardt, Britta·2015·Journal of Cell Biology

Abstract

Unique intercellular junctional complexes between the central nervous system (CNS) microvascular endothelial cells and the choroid plexus epithelial cells form the endothelial blood–brain barrier (BBB) and the epithelial blood–cerebrospinal fluid barrier (BCSFB), respectively. These barriers inhibit paracellular diffusion, thereby protecting the CNS from fluctuations in the blood. Studies of brain barrier integrity during development, normal physiology, and disease have focused on BBB and BCSFB tight junctions but not the corresponding endothelial and epithelial adherens junctions. The crosstalk between adherens junctions and tight junctions in maintaining barrier integrity is an understudied area that may represent a promising target for influencing brain barrier function.

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Integrity signals

Registry

Crossref · 10.1083/jcb.201412147

Cites

140 of 140 references verified0 citation errors · 0 not checkable

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  • Adherens junction proteins VE-cadherin and PECAM-1 form homophilic endothelial-to-endothelial contacts roughly 20 nm wide.

    “Closest to the basolateral membrane, AJ proteins, VE-cadherin, and platelet endothelial cell adhesion molecule-1 (PECAM-1) form homophilic endothelial-to-endothelial”

    From Blood-Brain Barrier: From Physiology to Disease and Back (2019) · cites this paper as [590]

    The Figure 1 caption (p. 2) says VE-cadherin forms homophilic contacts between adjacent endothelial cells. The table in “Maturation of brain barrier junctional complexes during development” (p. 5) places PECAM-1 at endothelial cell-to-cell junctions but lists it outside organized adherens and tight junctions. Our copy does not establish that PECAM-1 forms the claimed homophilic AJ contacts or that the contacts are roughly 20 nm wide. (LLM, conf=0.88)

    Experimental — accuracy not yet measured
  • Tight junction proteins claudin-1, claudin-3, claudin-5, claudin-12, and occludin limit paracellular diffusion of solutes and ions across the blood-brain barrier.

    “Closest to the apical membrane, TJ proteins claudin-1, -3, -5, and -12, and occludin limit paracellular diffusion of solutes and ions across the BBB (438, 590) (FIGURE 2) .”

    From Blood-Brain Barrier: From Physiology to Disease and Back (2019) · cites this paper as [590]

    The Introduction (p. 1) says BBB tight junctions prevent paracellular diffusion, and the junctional-protein table (pp. 4–5) supports a barrier role for claudin-5 and describes roles for claudin-1 and occludin. But the table says claudin-12’s function at the BBB is unknown and reports that claudin-3 seals the blood–CSF barrier, not BBB tight junctions, under neuroinflammatory conditions. It therefore does not support assigning the stated BBB diffusion-limiting role to all five proteins. (LLM, conf=0.89)

    Experimental — accuracy not yet measured
  • Endothelial cells interact with extracellular matrix proteins in the capillary basement membrane, including collagen, perlecan, and laminin, via α- and β-integrin receptors.

    “Endothelial cells interact with the extracellular matrix (ECM) proteins in the capillary basement membrane including collagen, perlecan, and laminin via 𝛂 - and 𝛃 -integrin receptors, which form transmembrane heterodimers that functionally link the ECM with the cell cytoskeleton (590).”

    From Blood-Brain Barrier: From Physiology to Disease and Back (2019) · cites this paper as [590]

    The Figure 2 caption in “Maturation of brain barrier junctional complexes during development” (p. 8) says BBB endothelial cells are anchored by β1-integrins to laminin, collagen, and perlecan in the endothelial basement membrane. Our copy does not establish the citing sentence’s additional description of α- and β-integrin heterodimers linking the ECM to the cytoskeleton. (LLM, conf=0.82)

    Experimental — accuracy not yet measured
  • Integrin receptors form transmembrane heterodimers that functionally link the extracellular matrix with the cell cytoskeleton.

    “which form transmembrane heterodimers that functionally link the ECM with the cell cytoskeleton (590).”

    From Blood-Brain Barrier: From Physiology to Disease and Back (2019) · cites this paper as [590]

    The section on maturation of brain barrier junctional complexes (p. 8) says that β1-integrins anchor endothelial cells to extracellular-matrix proteins. It does not state that integrins form transmembrane heterodimers or that they link the matrix to the cell cytoskeleton; the cytoskeletal links described elsewhere in that section concern other junctional proteins. (LLM, conf=0.82)

    Experimental — accuracy not yet measured
  • In contrast to leaky capillary endothelium in peripheral organs, the BBB endothelium is sealed by TJs and has a low rate of bulk-flow transcytosis.

    “In contrast to leaky capillary endothelium in peripheral organs (391), the BBB endothelium is sealed by TJs (492, 590, 682) and has low rate of bulk-flow transcytosis (538, 682).”

    From Blood-Brain Barrier: From Physiology to Disease and Back (2019) · cites this paper as [590]

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Research works printed but not linked: 1

  1. Engelhardt, B., K. Wolburg-Buchholz, and H. Wolburg. 2001. Involvement of the choroid plexus in central nervous system inflammation. Microsc. Res. Tech. 52:112-129. http://dx.doi.org/10.1002/1097-0029(20010101)52: 1<112::AID-JEMT13>3.0.CO;2-5 · DOI

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Authors
Tietz, S., & Engelhardt, B.
Affiliations
University of Bern (CH)
Corresponding author
Engelhardt, Britta
Venue
Journal of Cell Biology
Published
2015-05-25
Volume
209
Issue
4
Pages
493-506
ISSN
  • 0021-9525 (ISSN-L)
  • 1540-8140
OpenAlex
W1929386789
Cited by
551
References
140
Citations by year
2026: 44 · 2025: 43 · 2024: 44 · 2023: 56 · 2022: 65 · 2021: 65 · 2020: 63 · 2019: 49 · 2018: 43 · 2017: 47 · 2016: 26 · 2015: 6
FWCI
3.24
Type
journal article
Language
en
Open access
Locations
  • The Journal of Cell Biology (publishedVersion)
  • Europe PMC (PubMed Central) (publishedVersion, cc-by-nc-sa)
  • PubMed Central (publishedVersion, cc-by-nc-sa)
  • PubMed (publishedVersion)
  • Bern Open Repository and Information System (University of Bern) (submittedVersion, cc-by-nc-sa)
  • Open Access CRIS of the University of Bern
Topics
  • Life Sciences › Neuroscience › Neurology › Barrier Structure and Function Studies
  • Health Sciences › Medicine › Oncology › Drug Transport and Resistance Mechanisms
  • Health Sciences › Medicine › Immunology and Allergy › Cell Adhesion Molecules Research
Keywords
blood-brain barrier, blood-CSF barrier, tight junctions, adherens junctions, endothelial cells, choroid plexus epithelial cells, paracellular diffusion, barrier integrity
MeSH terms
Animals, Biological Transport, Blood-Brain Barrier, Brain, Endothelium, Vascular, Humans, Tight Junctions, Adherens Junctions, Endothelial Cells, Microvessels

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