Cited by 128Barrier Structure and Function StudiesNeuroinflammation and Neurodegeneration MechanismsCerebrospinal fluid and hydrocephalus

Inflammation of the Embryonic Choroid Plexus Barrier following Maternal Immune Activation

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Cui, Jin, Shipley, Frederick B., Shannon, Morgan L., Alturkistani, Osama, Dani, Neil, Webb, Mya D., Sugden, Arthur U., Andermann, Mark L. +1 more·2020·Developmental Cell

Abstract

The choroid plexus (ChP) regulates brain development by secreting instructive cues and providing a protective brain barrier. Here, we show that polyI:C-mediated maternal immune activation leads to an inflammatory response in the developing embryonic mouse brain that manifests as pro-inflammatory cerebrospinal fluid (CSF) and accumulation of ChP macrophages. Elevation of CSF-CCL2 was sufficient to drive ChP immune cell recruitment, activation, and proliferation. In addition, ChP macrophages abandoned their regular tiling pattern and relocated to the ChP-free margin where they breached the weakened epithelial barrier. We further found that these immune cells entered from the ChP into the brain via anatomically specialized "hotspots" at the distal tips of ChP villi. In vivo two-photon imaging demonstrated that surveillance behaviors in ChP macrophages had already emerged at this early stage of embryogenesis. Thus, the embryonic ChP forms a functional brain barrier that can mount an inflammatory response to external insults.

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Crossref · 10.1016/j.devcel.2020.09.020

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  • Systemic chronic inflammation resulting from immunosenescence and non-neurotropic viral infection compels immune cells in the peripheral blood to penetrate the blood-brain barrier and choroid plexus and enter the brain; immune cells originating from the cranial bone marrow migrate to the meninges, thereby promoting neuroinflammation and neuronal dysfunction while inhibiting neurogenesis, and thisc

    “Finally, the systemic chronic inflammation resulting from immunosenescence and non-neurotropic viral infection compels immune cells in the peripheral blood to penetrate the blood-brain barrier (BBB) and choroid plexus and enter the brain,345,346 Additionally, immune cells originating from the cranial bone marrow migrate to the meninges,347 thereby promoting neuroinflammation and neuronal”
  • Cx3cr1-GFP-expressing cells tiled across the ChP, with the subset expressing SLC40A1 located proximal to major vessels.

    “Cx3cr1-GFP-expressing cells tiled across the ChP (Figure 5E; Cui et al., 2020), with the subset expressing SLC40A1 located proximal to major vessels, suggesting roles in regulating iron homeostasis (Figure 5F).”

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Authors
Cui, J., Shipley, F. B., Shannon, M. L., Alturkistani, O., Dani, N., Webb, M. D., Sugden, A. U., Andermann, M. L., & Lehtinen, M. K.
Affiliations
  • Boston Children's Hospital (US)
  • Beth Israel Deaconess Medical Center (US)
Corresponding author
Lehtinen, Maria K.
Venue
Developmental Cell
Publisher
Elsevier BV
Published
2020-12
Volume
55
Issue
5
Pages
617-628.e6
ISSN
1534-5807 (ISSN-L)
OpenAlex
W3091787096
Cited by
128
References
83
Citations by year
2026: 20 · 2025: 28 · 2024: 32 · 2023: 19 · 2022: 11 · 2021: 17 · 2020: 1
FWCI
4.65
Type
journal article
Language
en
Open access
Locations
  • Developmental Cell (publishedVersion)
  • PubMed (publishedVersion)
  • PubMed Central (acceptedVersion)
Funders
  • New York Stem Cell Foundation
  • Dana Foundation (R01 DK109930, DP2 DK105570)
  • Pew Charitable Trusts
  • McKnight Foundation
  • Simons Foundation (402089)
  • National Science Foundation (T32 5T32DK007516)
  • American Foundation for Aging Research
  • Simons Foundation Autism Research Initiative (R01 NS088566, RF1DA048790)
  • National Institutes of Health (T32 HL110852, RF1DA048790)
Topics
  • Life Sciences › Neuroscience › Neurology › Barrier Structure and Function Studies
  • Life Sciences › Neuroscience › Neurology › Neuroinflammation and Neurodegeneration Mechanisms
  • Life Sciences › Neuroscience › Cellular and Molecular Neuroscience › Cerebrospinal fluid and hydrocephalus
Keywords
choroid plexus, maternal immune activation, poly(I:C), embryonic brain development, cerebrospinal fluid, MCP-1, choroid plexus macrophages, choroid plexus epithelium, macrophage migration, neuroinflammation, brain barriers
MeSH terms
Animals, Calcium-Binding Proteins, Cerebrospinal Fluid, Choroid Plexus, Inflammation, Macrophage Activation, Mice, Inbred C57BL, Microfilament Proteins, Signal Transduction, Up-Regulation, Inflammation Mediators, Chemokine CCL2, Tight Junctions, Imaging, Three-Dimensional, Cell Proliferation, Receptors, CCR2

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