Cited by 222Barrier Structure and Function StudiesMultiple Sclerosis Research StudiesNeuroinflammation and Neurodegeneration Mechanisms

Astrocytic tight junctions control inflammatory CNS lesion pathogenesis

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Horng, Sam, Therattil, Anthony, Moyon, Sarah, Gordon, Alexandra, Kim, Karla, Argaw, Azeb Tadesse, Hara, Yuko, Mariani, John N. +7 more·2017·Journal of Clinical Investigation

Abstract

Lesions and neurologic disability in inflammatory CNS diseases such as multiple sclerosis (MS) result from the translocation of leukocytes and humoral factors from the vasculature, first across the endothelial blood-brain barrier (BBB) and then across the astrocytic glia limitans (GL). Factors secreted by reactive astrocytes open the BBB by disrupting endothelial tight junctions (TJs), but the mechanisms that control access across the GL are unknown. Here, we report that in inflammatory lesions, a second barrier composed of reactive astrocyte TJs of claudin 1 (CLDN1), CLDN4, and junctional adhesion molecule A (JAM-A) subunits is induced at the GL. In a human coculture model, CLDN4-deficient astrocytes were unable to control lymphocyte segregation. In models of CNS inflammation and MS, mice with astrocyte-specific Cldn4 deletion displayed exacerbated leukocyte and humoral infiltration, neuropathology, motor disability, and mortality. These findings identify a second inducible barrier to CNS entry at the GL. This barrier may be therapeutically targetable in inflammatory CNS disease.

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  • The glia limitans and basement membranes create a barrier between circulating components of the immune system and the CNS parenchyma, a division that is integral to the neuroimmune axis.

    “The glia limitans and basement membranes also create a barrier between circulating components of the immune system and the CNS parenchyma, a division that is integral to the neuroimmune axis (42).”

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Authors
Horng, S., Therattil, A., Moyon, S., Gordon, A., Kim, K., Argaw, A. T., Hara, Y., Mariani, J. N., Sawai, S., Flodby, P., Crandall, E. D., Borok, Z., Sofroniew, M. V., Chapouly, C., & John, G. R.
Affiliations
  • Icahn School of Medicine at Mount Sinai (US)
  • University of Southern California (US)
  • University of California, Los Angeles (US)
Venue
Journal of Clinical Investigation
Published
2017-07-24
Volume
127
Issue
8
Pages
3136-3151
ISSN
  • 0021-9738 (ISSN-L)
  • 1558-8238
OpenAlex
W2737157719
Cited by
221
References
69
Citations by year
2026: 13 · 2025: 17 · 2024: 21 · 2023: 29 · 2022: 26 · 2021: 34 · 2020: 26 · 2019: 23 · 2018: 29 · 2017: 3
FWCI
11.05
Type
journal article
Language
en
Open access
Locations
  • Journal of Clinical Investigation (publishedVersion)
  • PubMed Central (publishedVersion)
  • PubMed (publishedVersion)
  • HAL AMU (submittedVersion, cc-by)
  • eScholarship (California Digital Library) (submittedVersion)
Funders
  • Icahn School of Medicine at Mount Sinai
  • Guthy-Jackson Charitable Foundation
  • Hastings Foundation
  • Beker Foundation
  • National Institutes of Health
  • National Heart, Lung, and Blood Institute (P01HL119165, R01HL126877, U01HL108634, R01HL112638)
  • National Cancer Institute (R24CA095823)
  • National Institute of Neurological Disorders and Stroke (R01NS062703, R25NS079102, R01NS084030, R01NS085103)
Topics
  • Life Sciences › Neuroscience › Neurology › Barrier Structure and Function Studies
  • Health Sciences › Medicine › Pathology and Forensic Medicine › Multiple Sclerosis Research Studies
  • Life Sciences › Neuroscience › Neurology › Neuroinflammation and Neurodegeneration Mechanisms
Keywords
glia limitans, multiple sclerosis, blood-brain barrier, claudin-4, claudin-1, JAM-A, reactive astrocytes, leukocyte transmigration, neuroinflammation, motor impairment
MeSH terms
Animals, Astrocytes, Blood-Brain Barrier, Central Nervous System, Disease Models, Animal, Encephalomyelitis, Autoimmune, Experimental, Female, Humans, Inflammation, Mice, Inbred C57BL, Multiple Sclerosis, Nervous System Diseases, Receptors, Cell Surface, Cell Adhesion Molecules, Cytokines, Mice, Knockout, Coculture Techniques, Tight Junctions, Mice, Claudin-1, Claudin-4

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