Cited by 1,125Barrier Structure and Function StudiesNeuroinflammation and Neurodegeneration MechanismsAngiogenesis and VEGF in Cancer

Pericytes of the neurovascular unit: key functions and signaling pathways

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Sweeney, Melanie D, Ayyadurai, Shiva, Zlokovic, Berislav V·2016·Nature Neuroscience

Abstract

Pericytes are vascular mural cells embedded in the basement membrane of blood microvessels. They extend their processes along capillaries, pre-capillary arterioles and post-capillary venules. CNS pericytes are uniquely positioned in the neurovascular unit between endothelial cells, astrocytes and neurons. They integrate, coordinate and process signals from their neighboring cells to generate diverse functional responses that are critical for CNS functions in health and disease, including regulation of the blood-brain barrier permeability, angiogenesis, clearance of toxic metabolites, capillary hemodynamic responses, neuroinflammation and stem cell activity. Here we examine the key signaling pathways between pericytes and their neighboring endothelial cells, astrocytes and neurons that control neurovascular functions. We also review the role of pericytes in CNS disorders including rare monogenic diseases and complex neurological disorders such as Alzheimer's disease and brain tumors. Finally, we discuss directions for future studies.

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Crossref · 10.1038/nn.4288

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  • Pericyte-derived angiopoietin acts on endothelial Tie2 receptor and maintains BBB function.

    “pericyte-derived angiopoietin acts on endothelial Tie2 receptor and maintains BBB function (26, 570, 648);”

    From Blood-Brain Barrier: From Physiology to Disease and Back (2019) · cites this paper as [570]

    The Ang/Tie2 pathway section states that pericyte-secreted Ang1 binds the endothelial Tie2 receptor and that Ang/Tie2 signaling regulates vascular permeability. The neurological-disorders section associates reduced Ang1 and Tie2 expression with BBB breakdown after ischemic stroke in a diabetic mouse model; it does not establish that this signaling maintains BBB function generally. (LLM, conf=0.82)

    Experimental — accuracy not yet measured
  • Pericyte-endothelial interaction plays a key role in the establishment and maintenance of the BBB.

    “Pericyte-endothelial interaction plays a key role in the establishment and maintenance of the BBB (27, 570, 648, 682).”

    From Blood-Brain Barrier: From Physiology to Disease and Back (2019) · cites this paper as [570]

  • At the capillary level, BBB integrity is maintained by pericytes.

    “At the capillary level, BBB integrity is maintained by pericytes (28, 59, 130, 570).”

    From Blood-Brain Barrier: From Physiology to Disease and Back (2019) · cites this paper as [570]

  • Pericytes share a common basement membrane with brain capillary endothelial cells.

    “Pericytes share a common basement membrane with brain capillary endothelial cells (570).”

    From Blood-Brain Barrier: From Physiology to Disease and Back (2019) · cites this paper as [570]

  • Pericyte-deficient mouse models caused by aberrant PDGF-BB/PDGFRβ signaling exhibit impaired BBB formation and maintenance.

    “Pericytedeficient mouse models caused by aberrant PDGF-BB/ PDGFR𝛃 signaling (365, 419, 436, 570, 575) exhibit impaired BBB formation (28, 59, 130) and maintenance (59, 436).”

    From Blood-Brain Barrier: From Physiology to Disease and Back (2019) · cites this paper as [570]

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Authors
Sweeney, M. D., Ayyadurai, S., & Zlokovic, B. V.
Affiliations
University of Southern California (US)
Venue
Nature Neuroscience
Published
2016-05-26
Volume
19
Issue
6
Pages
771-783
ISSN
  • 1097-6256 (ISSN-L)
  • 1546-1726
OpenAlex
W2399776559
Cited by
1,125
References
175
Citations by year
2026: 108 · 2025: 113 · 2024: 140 · 2023: 121 · 2022: 132 · 2021: 127 · 2020: 123 · 2019: 89 · 2018: 92 · 2017: 67 · 2016: 13
FWCI
7.63
Type
journal article
Language
en
Open access
Locations
  • Nature Neuroscience (publishedVersion)
  • PubMed (publishedVersion)
  • Europe PMC (PubMed Central) (acceptedVersion)
  • PubMed Central (acceptedVersion)
Funders
  • National Institute on Aging (R01AG023084, R01AG039452, RF1AG039452)
  • National Institute of Neurological Disorders and Stroke (R01NS090904, R01NS034467)
Topics
  • Life Sciences › Neuroscience › Neurology › Barrier Structure and Function Studies
  • Life Sciences › Neuroscience › Neurology › Neuroinflammation and Neurodegeneration Mechanisms
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Angiogenesis and VEGF in Cancer
Keywords
pericytes, neurovascular unit, signaling pathways, blood-brain barrier permeability, angiogenesis, capillary hemodynamics, neuroinflammation, stem cell activity, Alzheimer's disease, brain tumors, central nervous system disorders
MeSH terms
Animals, Blood-Brain Barrier, Brain, Brain Diseases, Cerebrovascular Circulation, Humans, Signal Transduction, Pericytes, Microvessels

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