Cited by 185Barrier Structure and Function StudiesMultiple Sclerosis Research StudiesDrug Transport and Resistance Mechanisms

Netrin 1 regulates blood–brain barrier function and neuroinflammation

Open access
Podjaski, Cornelia, Alvarez, Jorge I., Bourbonniere, Lyne, Larouche, Sandra, Terouz, Simone, Bin, Jenea M., Lécuyer, Marc-André, Saint-Laurent, Olivia +6 more·2015·Brain

Abstract

Blood–brain barrier function is driven by the influence of astrocyte-secreted factors. During neuroinflammatory responses the blood–brain barrier is compromised resulting in central nervous system damage and exacerbated pathology. Here, we identified endothelial netrin 1 induction as a vascular response to astrocyte-derived sonic hedgehog that promotes autocrine barrier properties during homeostasis and increases with inflammation. Netrin 1 supports blood–brain barrier integrity by upregulating endothelial junctional protein expression, while netrin 1 knockout mice display disorganized tight junction protein expression and barrier breakdown. Upon inflammatory conditions, blood–brain barrier endothelial cells significantly upregulated netrin 1 levels in vitro and in situ, which prevented junctional breach and endothelial cell activation. Finally, netrin 1 treatment during experimental autoimmune encephalomyelitis significantly reduced blood–brain barrier disruption and decreased clinical and pathological indices of disease severity. Our results demonstrate that netrin 1 is an important regulator of blood–brain barrier maintenance that protects the central nervous system against inflammatory conditions such as multiple sclerosis and experimental autoimmune encephalomyelitis. Astrocyte-derived Sonic Hedgehog helps to maintain the integrity of the blood-brain barrier, but many of its downstream effectors are unknown. Podjaski et al. show that in multiple sclerosis, Sonic Hedgehog upregulates netrin-1 expression on the CNS vasculature, inducing an autocrine response that reduces blood-brain barrier permeability and dampens neuroinflammation.

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Crossref · 10.1093/brain/awv092

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  • Neural guidance molecules such as netrins and semaphorins also shape the growing cerebrovasculature and BBB functions.

    “and neural guidance molecules such as netrins and semaphorins also shape the growing cerebrovasculature and BBB functions (22, 475, 596, 628).”

    From Blood-Brain Barrier: From Physiology to Disease and Back (2019) · cites this paper as [475]

    The Results show that netrin 1 contributes to blood–brain barrier integrity in human endothelial cells and newborn mice, and the Introduction reports angiogenic effects of netrins. But the Results found no difference in CNS vessel numbers in newborn netrin 1 knockout mice; this paper does not establish that netrin 1 shapes the growing cerebrovasculature. It does not address semaphorins, which may be covered by the sentence’s other citations. (LLM, conf=0.86)

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Authors
Podjaski, C., Alvarez, J. I., Bourbonniere, L., Larouche, S., Terouz, S., Bin, J. M., Lécuyer, M.-A., Saint-Laurent, O., Larochelle, C., Darlington, P. J., Arbour, N., Antel, J. P., Kennedy, T. E., & Prat, A.
Affiliations
  • Montreal Neurological Institute and Hospital (CA)
  • Centre Hospitalier de l’Université de Montréal (CA)
Venue
Brain
Published
2015-04-22
Volume
138
Issue
6
Pages
1598-1612
ISSN
  • 0006-8950 (ISSN-L)
  • 1460-2156
OpenAlex
W1963680784
Cited by
185
References
39
Citations by year
2026: 11 · 2025: 16 · 2024: 18 · 2023: 8 · 2022: 26 · 2021: 20 · 2020: 18 · 2019: 21 · 2018: 15 · 2017: 17 · 2016: 10 · 2015: 4 · 2013: 1
FWCI
8.19
Type
journal article
Language
en
Open access
Locations
  • Brain (publishedVersion)
  • PubMed Central (publishedVersion)
  • PubMed (publishedVersion)
Funders
Canadian Institutes of Health Research (113558_1)
Topics
  • Life Sciences › Neuroscience › Neurology › Barrier Structure and Function Studies
  • Health Sciences › Medicine › Pathology and Forensic Medicine › Multiple Sclerosis Research Studies
  • Health Sciences › Medicine › Oncology › Drug Transport and Resistance Mechanisms
Keywords
netrin-1, blood-brain barrier, neuroinflammation, Sonic hedgehog, astrocytes, endothelial cells, tight junctions, endothelial barrier integrity, experimental autoimmune encephalomyelitis, multiple sclerosis, autocrine signaling, blood-brain barrier permeability
MeSH terms
Netrin-1, Animals, Anti-Inflammatory Agents, Blood Proteins, Blood-Brain Barrier, Encephalomyelitis, Autoimmune, Experimental, Humans, Inflammation, Membrane Proteins, Multiple Sclerosis, Nerve Growth Factors, Permeability, Up-Regulation, Mice, Knockout, Inflammation Mediators, Tight Junctions, Tumor Suppressor Proteins, Endothelial Cells, Mice, Primary Cell Culture

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