Cited by 323Liver physiology and pathologyHepatitis B Virus StudiesCell Adhesion Molecules Research

Immunosurveillance of the Liver by Intravascular Effector CD8 + T Cells

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Guidotti, Luca G., Inverso, Donato, Sironi, Laura, Di Lucia, Pietro, Fioravanti, Jessica, Ganzer, Lucia, Fiocchi, Amleto, Vacca, Maurizio +12 more·2015·Cell

Abstract

Effector CD8(+) T cells (CD8 TE) play a key role during hepatotropic viral infections. Here, we used advanced imaging in mouse models of hepatitis B virus (HBV) pathogenesis to understand the mechanisms whereby these cells home to the liver, recognize antigens, and deploy effector functions. We show that circulating CD8 TE arrest within liver sinusoids by docking onto platelets previously adhered to sinusoidal hyaluronan via CD44. After the initial arrest, CD8 TE actively crawl along liver sinusoids and probe sub-sinusoidal hepatocytes for the presence of antigens by extending cytoplasmic protrusions through endothelial fenestrae. Hepatocellular antigen recognition triggers effector functions in a diapedesis-independent manner and is inhibited by the processes of sinusoidal defenestration and capillarization that characterize liver fibrosis. These findings reveal the dynamic behavior whereby CD8 TE control hepatotropic pathogens and suggest how liver fibrosis might reduce CD8 TE immune surveillance toward infected or transformed hepatocytes.

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Crossref · 10.1016/j.cell.2015.03.005

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  • Effector CD8+ T cells can extend cellular protrusions through sinusoidal fenestrae and make contact with the hepatocyte membrane, creating a synapse-like process.

    “Furthermore, they can extend cellular protrusions through the sinusoidal fenestrae and make contact with the hepatocyte membrane, creating a synapse-like process(101).”
  • Reducing the access of T cells to the sinusoidal fenestrae inhibits antigen recognition.

    “They have demonstrated that reducing the access of T cells to the sinusoidal fenestrae inhibits antigen recognition(101).”
  • In a transgenic mouse model of HBV infection, effector CD8+ T cells arrest within the sinusoids by docking on platelets adhered to LSECs, crawl along sinusoids, and extend cytoplasmic protrusions through LSEC fenestrae to search for antigens on hepatocytes.

    “In a transgenic mouse model of hepatitis B virus infection, in which mouse GP-Ibα is replaced with transgenic human GP-Ibα, it has been observed that effector CD8+ T cells arrest within the sinusoids by docking on platelets, which are already adhered to LSECs. Then, effector CD8+ T cells crawl along the sinusoids and extend their cytoplasmic protrusions through LSEC fenestrae to search for antigen”

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Authors
Guidotti, L. G., Inverso, D., Sironi, L., Di Lucia, P., Fioravanti, J., Ganzer, L., Fiocchi, A., Vacca, M., Aiolfi, R., Sammicheli, S., Mainetti, M., Cataudella, T., Raimondi, A., Gonzalez-Aseguinolaza, G., Protzer, U., Ruggeri, Z. M., Chisari, F. V., Isogawa, M., Sitia, G., & Iannacone, M.
Affiliations
  • Scripps Research Institute (US)
  • Vita-Salute San Raffaele University (IT)
  • IRCCS Ospedale San Raffaele (IT)
  • Technical University of Munich (DE)
Corresponding author
  • Guidotti, Luca G.
  • Iannacone, Matteo
Venue
Cell
Publisher
Elsevier BV
Published
2015-04
Volume
161
Issue
3
Pages
486-500
ISSN
0092-8674 (ISSN-L)
OpenAlex
W1971197010
Cited by
323
References
47
Citations by year
2026: 22 · 2025: 28 · 2024: 27 · 2023: 21 · 2022: 29 · 2021: 26 · 2020: 42 · 2019: 26 · 2018: 25 · 2017: 34 · 2016: 30 · 2015: 9
FWCI
19.36
Type
journal article
Language
en
Open access
Locations
  • Cell (publishedVersion)
  • PubMed (publishedVersion)
  • PubMed Central (acceptedVersion)
  • BOA (University of Milano-Bicocca) (submittedVersion, other-oa)
  • Archivio Istituzionale della Ricerca - Università Vita-Salute San Raffaele (submittedVersion)
  • mediaTUM – the media and publications repository of the Technical University Munich (Technical University Munich) (submittedVersion)
Funders
  • Giovanni Armenise-Harvard Foundation
  • Associazione Italiana per la Ricerca sul Cancro
  • National Institutes of Health (HL-42846)
  • National Heart, Lung, and Blood Institute (HL 42846, R01HL042846, R37HL042846)
  • National Institute of Allergy and Infectious Diseases (AI-40696, R01AI040696)
  • FP7 Ideas: European Research Council (281648, 250219)
Topics
  • Health Sciences › Medicine › Hepatology › Liver physiology and pathology
  • Health Sciences › Medicine › Epidemiology › Hepatitis B Virus Studies
  • Health Sciences › Medicine › Immunology and Allergy › Cell Adhesion Molecules Research
Keywords
CD8+ T cells, hepatitis B virus, CD44, hyaluronic acid, liver sinusoids, endothelial fenestrae, transendothelial migration, liver fibrosis, capillarization
MeSH terms
Animals, Cell Movement, Hepatitis B, Hepatitis B virus, Hyaluronic Acid, Liver, Liver Cirrhosis, Mice, Inbred C57BL, Platelet Adhesiveness, Specific Pathogen-Free Organisms, Monitoring, Immunologic, CD8-Positive T-Lymphocytes, Hepatocytes, Endothelial Cells, Mice

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