Cited by 71Barrier Structure and Function StudiesCell Adhesion Molecules ResearchDrug Transport and Resistance Mechanisms

Occludin oligomeric assembly at tight junctions of the blood-brain barrier is disrupted by peripheral inflammatory hyperalgesia

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McCaffrey, Gwen, Seelbach, Melissa J., Staatz, William D., Nametz, Nicole, Quigley, Carolyn, Campos, Chris R., Brooks, Tracy A., Davis, Thomas P.·2008·Journal of Neurochemistry

Abstract

Tight junctions (TJs) at the blood‐brain barrier (BBB) dynamically alter paracellular diffusion of blood‐borne substances from the peripheral circulation to the CNS in response to external stressors, such as pain, inflammation, and hypoxia. In this study, we investigated the effect of λ‐carrageenan‐induced peripheral inflammatory pain (i.e., hyperalgesia) on the oligomeric assembly of the key TJ transmembrane protein, occludin. Oligomerization of integral membrane proteins is a critical step in TJ complex assembly that enables the generation of tightly packed, large multiprotein complexes capable of physically obliterating the interendothelial space to inhibit paracellular diffusion. Intact microvessels isolated from rat brains were fractionated by detergent‐free density gradient centrifugation, and gradient fractions were analyzed by sodium dodecyl sulfate–polyacrylamide gel electrophoresis/ Western blot. Injection of λ‐carrageenan into the rat hind paw produced after 3 h a marked change in the relative amounts of oligomeric, dimeric, and monomeric occludin isoforms associated with different plasma membrane lipid raft domains and intracellular compartments in endothelial cells at the BBB. Our findings suggest that increased BBB permeability (i.e., leak) associated with λ‐carrageenan‐induced peripheral inflammatory pain is promoted by the disruption of disulfide‐bonded occludin oligomeric assemblies, which renders them incapable of forming an impermeant physical barrier to paracellular transport.

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Crossref · 10.1111/j.1471-4159.2008.05582.x

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Authors
McCaffrey, G., Seelbach, M. J., Staatz, W. D., Nametz, N., Quigley, C., Campos, C. R., Brooks, T. A., & Davis, T. P.
Affiliations
  • University of Arizona (US)
  • BIO5 Institute (US)
Venue
Journal of Neurochemistry
Publisher
Wiley
Published
2008-09
Volume
106
Issue
6
Pages
2395-2409
ISSN
  • 0022-3042 (ISSN-L)
  • 1471-4159
OpenAlex
W2000794581
Cited by
71
References
87
Citations by year
2024: 2 · 2023: 2 · 2022: 5 · 2021: 2 · 2020: 3 · 2019: 5 · 2018: 5 · 2017: 3 · 2016: 2 · 2015: 3 · 2014: 1 · 2013: 6 · 2012: 9
FWCI
5.03
Type
journal article
Language
en
Open access
Locations
  • Journal of Neurochemistry (publishedVersion)
  • PubMed (publishedVersion)
  • PubMed Central (acceptedVersion)
Funders
  • National Institutes of Health (5r01da011271-16)
  • National Institute on Drug Abuse (R01-DA011271, R01-DA12684)
  • National Cancer Institute (CA 09820-0251)
  • National Institute of Neurological Disorders and Stroke (R01NS 39592, R01NS042652, R01NS039592, R01NS42652)
Topics
  • Life Sciences › Neuroscience › Neurology › Barrier Structure and Function Studies
  • Health Sciences › Medicine › Immunology and Allergy › Cell Adhesion Molecules Research
  • Health Sciences › Medicine › Oncology › Drug Transport and Resistance Mechanisms
Keywords
occludin, tight junctions, blood-brain barrier, lambda-carrageenan, disulfide bonds, paracellular diffusion, blood-brain barrier permeability, lipid rafts, endothelial cells
MeSH terms
Animals, Biological Transport, Active, Blood-Brain Barrier, Carrageenan, Cell Compartmentation, Diffusion, Female, Hyperalgesia, Inflammation, Membrane Proteins, Microcirculation, Protein Binding, Rats, Sprague-Dawley, Tight Junctions, Protein Subunits, Membrane Microdomains, Endothelial Cells, Macromolecular Substances, Rats, Occludin

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