Cited by 115Vascular Malformations Diagnosis and TreatmentBarrier Structure and Function StudiesCell Adhesion Molecules Research

CCM1–ICAP-1 complex controls β1 integrin–dependent endothelial contractility and fibronectin remodeling

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Faurobert, Eva, Rome, Claire, Lisowska, Justyna, Manet-Dupé, Sandra, Boulday, Gwénola, Malbouyres, Marilyne, Balland, Martial, Bouin, Anne-Pascale +6 more·2013·Journal of Cell Biology

Abstract

The endothelial CCM complex regulates blood vessel stability and permeability. Loss-of-function mutations in CCM genes are responsible for human cerebral cavernous malformations (CCMs), which are characterized by clusters of hemorrhagic dilated capillaries composed of endothelium lacking mural cells and altered sub-endothelial extracellular matrix (ECM). Association of the CCM1/2 complex with ICAP-1, an inhibitor of β1 integrin, prompted us to investigate whether the CCM complex interferes with integrin signaling. We demonstrate that CCM1/2 loss resulted in ICAP-1 destabilization, which increased β1 integrin activation and led to increased RhoA-dependent contractility. The resulting abnormal distribution of forces led to aberrant ECM remodeling around lesions of CCM1- and CCM2-deficient mice. ICAP-1–deficient vessels displayed similar defects. We demonstrate that a positive feedback loop between the aberrant ECM and internal cellular tension led to decreased endothelial barrier function. Our data support that up-regulation of β1 integrin activation participates in the progression of CCM lesions by destabilizing intercellular junctions through increased cell contractility and aberrant ECM remodeling.

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  • A recent report demonstrated that activation of β1-integrin due to loss of its inhibitor, ICAP-1, in human cerebral cavernous malformations, results in β1-integrin deposition in fibrillar adhesions, increased actin stress fibres and reduced endothelial barrier function, suggesting that increased β1-integrin activity destabilizes intercellular junctions via increased cell contractility and aberrant

    “A recent report demonstrated that activation of β1-integrin due to loss of its inhibitor, ICAP-1, in human cerebral cavernous malformations, results in β1-integrin deposition in fibrillar adhesions, increased actin stress fibres and reduced endothelial barrier function35, suggesting that increased β1-integrin activity destabilizes intercellular junctions via increased cell contractility and”

    From Endothelial destabilization by angiopoietin-2 via integrin β1 activation (2015) · cites this paper as [35]

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Authors
Faurobert, E., Rome, C., Lisowska, J., Manet-Dupé, S., Boulday, G., Malbouyres, M., Balland, M., Bouin, A.-P., Kéramidas, M., Bouvard, D., Coll, J.-L., Ruggiero, F., Tournier-Lasserve, E., & Albiges-Rizo, C.
Affiliations
  • Centre National de la Recherche Scientifique (FR)
  • Inserm (FR)
  • INSERM U823, Institut Albert Bonniot, Grenoble F-38042, France 1
  • École Normale Supérieure de Lyon (FR)
  • INSERM, UMR-S 740, Université Paris Diderot, Paris F-75010, France 4
Corresponding author
Faurobert, Eva
Venue
Journal of Cell Biology
Published
2013-08-05
Volume
202
Issue
3
Pages
545-561
ISSN
  • 0021-9525 (ISSN-L)
  • 1540-8140
OpenAlex
W2117038928
Cited by
114
References
83
Citations by year
2026: 9 · 2025: 3 · 2024: 12 · 2023: 8 · 2022: 9 · 2021: 6 · 2020: 15 · 2019: 4 · 2018: 8 · 2017: 5 · 2016: 7 · 2015: 10 · 2014: 15 · 2013: 3
FWCI
7.40
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)
  • HAL (submittedVersion)
Funders
  • Institut National de la Santé et de la Recherche Médicale
  • Ligue Contre le Cancer
  • Centre National de la Recherche Scientifique
Topics
  • Health Sciences › Medicine › Neurology › Vascular Malformations Diagnosis and Treatment
  • Life Sciences › Neuroscience › Neurology › Barrier Structure and Function Studies
  • Health Sciences › Medicine › Immunology and Allergy › Cell Adhesion Molecules Research
Keywords
CCM1, CCM2, beta1 integrin, endothelial contractility, RhoA signaling, extracellular matrix remodeling, fibronectin, cerebral cavernous malformations, endothelial barrier function, intercellular junctions, vascular stability
MeSH terms
KRIT1 Protein, Animals, Cell Adhesion, Cells, Cultured, Fibronectins, Humans, Mice, Inbred Strains, Microtubule-Associated Proteins, Models, Biological, Proto-Oncogene Proteins, Mice, Knockout, Integrin beta1, Intracellular Signaling Peptides and Proteins, Mice, Human Umbilical Vein Endothelial Cells

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