Cited by 365Barrier Structure and Function StudiesNeuroinflammation and Neurodegeneration MechanismsTraumatic Brain Injury and Neurovascular Disturbances

Purinergic receptor P2RY12-dependent microglial closure of the injured blood–brain barrier

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Lou, Nanhong, Takano, Takahiro, Pei, Yong, Xavier, Anna L., Goldman, Steven A., Nedergaard, Maiken·2016·Proceedings of the National Academy of Sciences

Abstract

Significance: Brain endothelial cells, pericytes, and astrocytes participate in maintenance of the blood–brain barrier (BBB). Juxtavascular microglial cells are also an integral part of the neurovascular unit. We show here that, in response to capillary injury, microglial processes rapidly form a dense plexiform aggregate at the site of injury. Photoablation of microglial cells abolished closure of BBB leakage, whereas inhibition of P2RY12 (purinergic receptor P2Y, G-protein coupled, 12) receptors suppressed microglial process motility and prolonged BBB closure. Thus, microglial cells mediate rapid resealing of injury-induced leaks in BBB. These observations may have clinical importance as P2RY12 receptor antagonists are widely used as platelet inhibitors in patients with coronary artery and cerebrovascular disease at risk for stroke and its attendant disruption of the injured BBB.

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Crossref · 10.1073/pnas.1520398113

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  • In a laser-induced model of focal BBB breakdown, focal cerebrovascular damage resulted in a rapid, purinergic receptor-dependent projection of microglia processes that walled off the damaged vessel, limiting the extent of BBB leakage.

    “In this model, focal cerebrovascular damage resulted in a rapid, purinergic receptor–dependent projection of microglia processes that walled off the damaged vessel, limiting the extent of BBB leakage (134).”
  • Microglia are dynamic players in synaptic pruning, maintaining homeostasis, and are primary responders to insult and injury in the CNS.

    “Although initially considered 'quiescent' cells primarily responsible for clearing cellular debris in the brain, microglia are now known as dynamic players in synaptic pruning, maintaining homeostasis and are primary responders to insult and injury in the CNS (Lou et al, 2016;Nimmerjahn et al, 2005;Paolicelli et al, 2011).”

    From Microglia Priming with Aging and Stress (2017) · cites this paper as Lou et al, 2016

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Authors
Lou, N., Takano, T., Pei, Y., Xavier, A. L., Goldman, S. A., & Nedergaard, M.
Affiliations
  • University of Rochester Medicine (US)
  • University of Copenhagen (DK)
Venue
Proceedings of the National Academy of Sciences
Published
2016-01-11
Volume
113
Issue
4
Pages
1074-1079
ISSN
  • 0027-8424 (ISSN-L)
  • 1091-6490
OpenAlex
W2234493563
Cited by
364
References
56
Citations by year
2026: 31 · 2025: 31 · 2024: 50 · 2023: 53 · 2022: 59 · 2021: 26 · 2020: 40 · 2019: 24 · 2018: 23 · 2017: 20 · 2016: 6 · 2015: 1
FWCI
13.33
Type
journal article
Language
en
Open access
Locations
  • Proceedings of the National Academy of Sciences (publishedVersion)
  • PubMed Central (publishedVersion)
  • PubMed (publishedVersion)
  • Research at the University of Copenhagen (University of Copenhagen) (publishedVersion)
Funders
  • NIH/NIDCR (R01DE022743)
  • NIH/NINDS (R01NS075177)
  • NIH/NCCIH (R01AT007945)
Topics
  • Life Sciences › Neuroscience › Neurology › Barrier Structure and Function Studies
  • Life Sciences › Neuroscience › Neurology › Neuroinflammation and Neurodegeneration Mechanisms
  • Health Sciences › Medicine › Neurology › Traumatic Brain Injury and Neurovascular Disturbances
Keywords
P2Y12 receptor, microglia, blood-brain barrier integrity, microglial chemotaxis, neurovascular unit, cerebrovascular injury, clopidogrel, G protein-coupled receptors
MeSH terms
Clopidogrel, Animals, Blood-Brain Barrier, Cell Movement, Male, Mice, Inbred C57BL, Platelet Aggregation Inhibitors, Ticlopidine, Microglia, Mice, Receptors, Purinergic P2Y12

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