Cited by 283Liver Disease Diagnosis and TreatmentLiver physiology and pathologyLiver Diseases and Immunity

Accumulation of natural killer T cells in progressive nonalcoholic fatty liver disease

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Syn, Wing-Kin, Oo, Ye Htun, Pereira, Thiago A., Karaca, Gamze F., Jung, Youngmi, Omenetti, Alessia, Witek, Rafal P., Choi, Steve S. +6 more·2010·Hepatology

Abstract

Liver inflammation is greater in nonalcoholic steatohepatitis (NASH) than steatosis, suggesting that immune responses contribute to nonalcoholic fatty liver disease (NAFLD) progression. Livers normally contain many natural killer T (NKT) cells that produce factors that modulate inflammatory and fibrogenic responses. Such cells are relatively depleted in steatosis, but their status in more advanced NAFLD is uncertain. We hypothesized that NKT cells accumulate and promote fibrosis progression in NASH. We aimed to determine if livers become enriched with NKT cells during NASH-related fibrosis; identify responsible mechanisms; and assess if NKT cells stimulate fibrogenesis. NKT cells were analyzed in wildtype mice and Patched-deficient (Ptc+/−) mice with an overly active Hedgehog (Hh) pathway, before and after feeding methionine choline-deficient (MCD) diets to induce NASH-related fibrosis. Effects of NKT cell-derived factors on hepatic stellate cells (HSC) were examined and fibrogenesis was evaluated in CD1d-deficient mice that lack NKT cells. NKT cells were quantified in human cirrhotic and nondiseased livers. During NASH-related fibrogenesis in wildtype mice, Hh pathway activation occurred, leading to induction of factors that promoted NKT cell recruitment, retention, and viability, plus liver enrichment with NKT cells. Ptc+/− mice accumulated more NKT cells and developed worse liver fibrosis; CD1d-deficient mice that lack NKT cells were protected from fibrosis. NKT cell-conditioned medium stimulated HSC to become myofibroblastic. Liver explants were 2-fold enriched with NKT cells in patients with non-NASH cirrhosis, and 4-fold enriched in patients with NASH cirrhosis. Conclusion : Hh pathway activation leads to hepatic enrichment with NKT cells that contribute to fibrosis progression in NASH. (Hepatology 2010;)

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Authors
Syn, W.-K., Oo, Y. H., Pereira, T. A., Karaca, G. F., Jung, Y., Omenetti, A., Witek, R. P., Choi, S. S., Guy, C. D., Fearing, C. M., Teaberry, V., Pereira, F. E. L., Adams, D. H., & Diehl, A. M.
Affiliations
  • Duke Medical Center (US)
  • University of Birmingham (GB)
  • Durham VA Health Care System (US)
Corresponding author
Diehl, Anna Mae
Venue
Hepatology
Published
2010-06
Volume
51
Issue
6
Pages
1998-2007
ISSN
0270-9139 (ISSN-L)
OpenAlex
W2040148868
Cited by
283
References
47
Citations by year
2026: 5 · 2025: 11 · 2024: 10 · 2023: 25 · 2022: 25 · 2021: 15 · 2020: 25 · 2019: 14 · 2018: 19 · 2017: 15 · 2016: 24 · 2015: 15 · 2014: 14 · 2013: 21 · 2012: 20
FWCI
15.36
Type
journal article
Language
en
Open access
Locations
  • Hepatology (publishedVersion)
  • PubMed (publishedVersion)
  • PubMed Central (acceptedVersion)
  • University of Birmingham Research Portal (University of Birmingham) (submittedVersion)
Funders
National Institute of Diabetes and Digestive and Kidney Diseases (R01DK077794, R01DK053792)
Topics
  • Health Sciences › Medicine › Epidemiology › Liver Disease Diagnosis and Treatment
  • Health Sciences › Medicine › Hepatology › Liver physiology and pathology
  • Health Sciences › Medicine › Hepatology › Liver Diseases and Immunity
Keywords
NKT cells, nonalcoholic steatohepatitis, liver fibrosis, Hedgehog signaling, Patched1, hepatic stellate cells, myofibroblast differentiation, CD1d, liver cirrhosis, methionine-choline-deficient diet, liver inflammation
MeSH terms
Animals, Choline Deficiency, Fatty Liver, Fibrosis, Humans, Liver, Methionine, Mice, Inbred C57BL, Signal Transduction, Mice, Hedgehog Proteins, Hepatic Stellate Cells, Natural Killer T-Cells

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