Cited by 183Liver Diseases and ImmunityLiver physiology and pathologyDrug-Induced Hepatotoxicity and Protection

MAIT cells are chronically activated in patients with autoimmune liver disease and promote profibrogenic hepatic stellate cell activation

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Böttcher, Katrin, Rombouts, Krista, Saffioti, Francesca, Roccarina, Davide, Rosselli, Matteo, Hall, Andrew, Luong, TuVinh, Tsochatzis, Emmanuel A. +2 more·2018·Hepatology

Abstract

Autoimmune liver diseases (AILDs) are chronic liver pathologies characterized by fibrosis and cirrhosis due to immune-mediated liver damage. In this study, we addressed the question whether mucosal-associated invariant T (MAIT) cells, innate-like T cells, are functionally altered in patients with AILD and whether MAIT cells can promote liver fibrosis through activation of hepatic stellate cells (HSCs). We analyzed the phenotype and function of MAIT cells from AILD patients and healthy controls by multicolor flow cytometry and investigated the interaction between human MAIT cells and primary human hepatic stellate cells (hHSCs). We show that MAIT cells are significantly decreased in peripheral blood and liver tissue of patients with AILD. Notably, MAIT cell frequency tended to decrease with increasing fibrosis stage. MAIT cells from AILD patients showed signs of exhaustion, such as impaired interferon-γ (IFN-γ) production and high ex vivo expression of the activation and exhaustion markers CD38, HLA-DR, and CTLA-4. Mechanistically, this exhausted state could be induced by repetitive stimulation of MAIT cells with the cytokines interleukin (IL)-12 and IL-18, leading to decreased IFN-γ and increased exhaustion marker expression. Of note, repetitive stimulation with IL-12 further resulted in expression of the profibrogenic cytokine IL-17A by otherwise exhausted MAIT cells. Accordingly, MAIT cells from both healthy controls and AILD patients were able to induce an activated, proinflammatory and profibrogenic phenotype in hHSCs in vitro that was partly mediated by IL-17. CONCLUSION: Our data provide evidence that MAIT cells in AILD patients have evolved towards an exhausted, profibrogenic phenotype and can contribute to the development of HSC-mediated liver fibrosis. These findings reveal a cellular and molecular pathway for fibrosis development in AILD that could be exploited for antifibrotic therapy. (Hepatology 2018;68:172-186).

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Crossref · 10.1002/hep.29782

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  • The crucial role of MAIT cells as liver sentinels against bacteria is suggested by the effect of their dysfunction in alcoholic liver disease, which increases greatly the susceptibility of these patients to liver infections.

    “The crucial role 446 of MAIT cells as liver sentinels against bacteria is suggested by the effect of their 447 dysfunction in alcoholic liver disease, which increases greatly the susceptibility of these 448 patients to liver infections(90, 91).”

    From The liver as a central "hub" of the immune system: pathophysiological implications (2025) · cites this paper as [91]

    The introductory passage (indexed under Abstract; page unavailable) describes liver-enriched MAIT cells that detect bacteria and contribute to antimicrobial defense. The Results and Discussion instead examine MAIT-cell dysfunction in autoimmune liver disease; they do not support the claim that dysfunction in alcoholic liver disease greatly increases patients’ susceptibility to liver infections. (LLM, conf=0.84)

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  • Experimental evidence clearly supports the profibrogenic activity of MAIT cells in the chronically injured liver.

    “Although the role of MAIT cells in the liver is evolving, experimental evidence clearly supports their profibrogenic activity in the chronically injured liver.99,100”

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Research works printed but not linked: 3

  1. Ussher JE, Bilton M, Attwod E, Shadwell J, Richardson R, de Lara C, et al. CD161 11CD8 1T cells, including the MAIT cell subset, are specifically activated by IL-121IL-18 in a TCR- independent manner. Eur J Immunol 2013;44:195-203.
  2. Annibali V, Ristori G, Angelini DF, Serafini B, Mechelli R, Cannoni S, et al. CD161highCD81T cells bear pathogenetic potential in multiple sclerosis. Brain 2011;134:542-554.
  3. Yoshida K, Yang G-X, Zhang W, Tsuda M, Tsuneyama K, Moritoki Y, et al. Deletion of IL-12p40 suppresses autoimmune cholangitis in dnTGFbRII mice. HEPATOLOGY 2009;50:1494- 1500.

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Authors
Böttcher, K., Rombouts, K., Saffioti, F., Roccarina, D., Rosselli, M., Hall, A., Luong, T., Tsochatzis, E. A., Thorburn, D., & Pinzani, M.
Affiliations
  • The Royal Free Hospital (GB)
  • University of Messina (IT)
Corresponding author
Böttcher, Katrin
Venue
Hepatology
Published
2018-07
Volume
68
Issue
1
Pages
172-186
ISSN
0270-9139 (ISSN-L)
OpenAlex
W2783230342
Cited by
183
References
50
Citations by year
2026: 12 · 2025: 17 · 2024: 24 · 2023: 24 · 2022: 20 · 2021: 26 · 2020: 35 · 2019: 16 · 2018: 8
FWCI
13.32
Type
journal article
Language
en
Open access
Locations
  • Hepatology (publishedVersion)
  • PubMed (publishedVersion)
  • UCL Discovery (University College London) (submittedVersion)
Funders
  • National Institute for Health and Care Research
  • University College London Hospitals NHS Foundation Trust
  • European Association for the Study of the Liver
  • Innovate UK
  • Royal Free Charity
Topics
  • Health Sciences › Medicine › Hepatology › Liver Diseases and Immunity
  • Health Sciences › Medicine › Hepatology › Liver physiology and pathology
  • Life Sciences › Pharmacology, Toxicology and Pharmaceutics › Pharmacology › Drug-Induced Hepatotoxicity and Protection
Keywords
mucosal-associated invariant T cells, autoimmune liver disease, liver fibrosis, hepatic stellate cell activation, T cell exhaustion, interferon-gamma, IL-12, IL-18, IL-17A, antifibrotic therapy, chronic liver disease
MeSH terms
Mucosal-Associated Invariant T Cells, Adult, Aged, Aged, 80 and over, Autoimmune Diseases, Female, Humans, Interleukins, Liver Cirrhosis, Lymphocyte Activation, Male, Middle Aged, Phenotype, Case-Control Studies, Cell Death, Hepatic Stellate Cells, Young Adult

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