Cited by 244Neuroinflammation and Neurodegeneration MechanismsBarrier Structure and Function StudiesTryptophan and brain disorders

Chronic Interleukin-1β Expression in Mouse Brain Leads to Leukocyte Infiltration and Neutrophil-Independent Blood–Brain Barrier Permeability without Overt Neurodegeneration

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Shaftel, Solomon S., Carlson, Thaddeus J., Olschowka, John A., Kyrkanides, Stephanos, Matousek, Sarah B., O'Banion, M. Kerry·2007·The Journal of Neuroscience

Abstract

The proinflammatory cytokine interleukin-1beta (IL-1beta) plays a significant role in leukocyte recruitment to the CNS. Although acute effects of IL-1beta signaling in the mouse brain have been well described, studies elucidating the downstream effects of sustained upregulation have been lacking. Using the recently described IL-1beta(XAT) transgenic mouse model, we triggered sustained unilateral hippocampal overexpression of IL-1beta. Transgene induction led to blood-brain barrier leakage, induction of MCP-1 (monocyte chemoattractant protein 1) (CCL2), ICAM-1 (intercellular adhesion molecule 1), and dramatic infiltration of CD45-positive leukocytes comprised of neutrophils, T-cells, macrophages, and dendritic cells. Despite prolonged cellular infiltration of the hippocampus, there was no evidence of neuronal degeneration. Surprisingly, neutrophils were observed in the hippocampal parenchyma as late as 1 year after transgene induction. Their presence was coincident with upregulation of the potent neutrophil chemotactic chemokines KC (keratinocyte-derived chemokine) (CXCL1) and MIP-2 (macrophage inflammatory protein 2) (CXCL2). Knock-out of their sole receptor CXCR2 abrogated neutrophil infiltration but failed to reduce leakage of the blood-brain barrier.

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Crossref · 10.1523/jneurosci.1418-07.2007

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Authors
Shaftel, S. S., Carlson, T. J., Olschowka, J. A., Kyrkanides, S., Matousek, S. B., & O'Banion, M. K.
Affiliations
University of Rochester Medicine (US)
Venue
The Journal of Neuroscience
Published
2007-08-29
Volume
27
Issue
35
Pages
9301-9309
ISSN
  • 0270-6474 (ISSN-L)
  • 1529-2401
OpenAlex
W2094676206
Cited by
243
References
55
Citations by year
2026: 6 · 2025: 7 · 2024: 5 · 2023: 9 · 2022: 14 · 2021: 13 · 2020: 10 · 2019: 18 · 2018: 22 · 2017: 9 · 2016: 15 · 2015: 13 · 2014: 19 · 2013: 19 · 2012: 10
FWCI
8.68
Type
journal article
Language
en
Open access
Locations
  • Journal of Neuroscience (publishedVersion, cc-by-nc-sa)
  • PubMed Central (publishedVersion)
  • PubMed (publishedVersion)
Funders
  • University of Rochester
  • National Institutes of Health
  • National Institute of General Medical Sciences (GM 07356, T32GM007356)
  • National Institute of Neurological Disorders and Stroke (NS048522, R29NS033553, NS 33553, R21NS048522, R01NS033553)
Topics
  • Life Sciences › Neuroscience › Neurology › Neuroinflammation and Neurodegeneration Mechanisms
  • Life Sciences › Neuroscience › Neurology › Barrier Structure and Function Studies
  • Life Sciences › Neuroscience › Biological Psychiatry › Tryptophan and brain disorders
Keywords
IL-1β, chronic neuroinflammation, blood-brain barrier permeability, leukocyte infiltration, neutrophils, CXCR2, CXCL1, CXCL2, MCP-1, ICAM-1, hippocampus, transgenic mouse model, neurodegeneration, chemokines
MeSH terms
Animals, Blood-Brain Barrier, Hippocampus, Leukocytes, Mice, Inbred C57BL, Mice, Transgenic, Neutrophils, Monokines, Up-Regulation, Leukocyte Common Antigens, Intercellular Adhesion Molecule-1, Chemokine CCL2, Mice, Interleukin-1beta, Chemokine CXCL2

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