Cited by 413Liver Disease Diagnosis and TreatmentLiver physiology and pathologyHippo pathway signaling and YAP/TAZ

Hepatocyte TAZ/WWTR1 Promotes Inflammation and Fibrosis in Nonalcoholic Steatohepatitis

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Wang, Xiaobo, Zheng, Ze, Caviglia, Jorge Matias, Corey, Kathleen E., Herfel, Tina M., Cai, Bishuang, Masia, Ricard, Chung, Raymond T. +3 more·2016·Cell Metabolism

Abstract

Nonalcoholic steatohepatitis (NASH) is a leading cause of liver disease worldwide. However, the molecular basis of how benign steatosis progresses to NASH is incompletely understood, which has limited the identification of therapeutic targets. Here we show that the transcription regulator TAZ (WWTR1) is markedly higher in hepatocytes in human and murine NASH liver than in normal or steatotic liver. Most importantly, silencing of hepatocyte TAZ in murine models of NASH prevented or reversed hepatic inflammation, hepatocyte death, and fibrosis, but not steatosis. Moreover, hepatocyte-targeted expression of TAZ in a model of steatosis promoted NASH features, including fibrosis. In vitro and in vivo mechanistic studies revealed that a key mechanism linking hepatocyte TAZ to NASH fibrosis is TAZ/TEA domain (TEAD)-mediated induction of Indian hedgehog (Ihh), a secretory factor that activates fibrogenic genes in hepatic stellate cells. In summary, TAZ represents a previously unrecognized factor that contributes to the critical process of steatosis-to-NASH progression.

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Crossref · 10.1016/j.cmet.2016.09.016

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  • TAZ protein has been upregulated in human MASLD and controlled the secretion of IHH.

    “TAZ protein has been upregulated in human MASLD and controlled the secretion of IHH [63]; Ihh gene was differentially regulated in the transcriptome analysis.”

    From Mechanical stiffness orchestrates distinct regulation of <scp>MRTFs</scp> and <scp>YAP</scp> / <scp>TAZ</scp> transcriptional cofactors in hepatocytes (2026) · cites this paper as [63]

    The Results section ('TAZ Levels are Increased in the Livers of Humans and Mice with NASH'; page unavailable) reports higher TAZ protein in human NASH liver, but similar staining in normal and steatotic livers. The Results section on Indian hedgehog (page unavailable) shows that TAZ silencing reduced Ihh in mouse hepatocyte culture medium. Thus the source supports TAZ upregulation in the NASH subset and TAZ-dependent Ihh secretion in a mouse cell model, not the broader claim of upregulation across human MASLD or direct evidence of secretion control in humans. (LLM, conf=0.88)

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  • The FPC NASH diet induces moderate liver fibrosis as well as insulin resistance.

    “Mice fed the fructose, palmitate and cholesterol-rich (FPC) NASH diet for 16 weeks, which induces moderate liver fibrosis as well as insulin resistance 30 , had increased frequencies and overall number of liver Treg cells as compared to animals fed normal chow (Fig. 1B-1C).”

    From Amphiregulin from regulatory T cells promotes liver fibrosis and insulin resistance in non-alcoholic steatohepatitis (2024) · cites this paper as [30]

    The Results report increased liver fibrosis, fasting glucose, and plasma insulin in FPC-fed mice after 16 weeks compared with chow-fed mice; the Discussion describes the model as developing fibrosis alongside insulin resistance. The paper does not characterize the fibrosis at 16 weeks as moderate, so that degree is not established by our copy. (LLM, conf=0.84)

    Experimental — accuracy not yet measured
  • Liver Treg cells were not enriched at an earlier timepoint (8 weeks) on the FPC diet when liver steatosis is evident but NASH has yet to develop.

    “Additionally, liver Treg cells were not enriched at an earlier timepoint (8 weeks) on the FPC diet when liver steatosis is evident but NASH has yet to develop 30 (Fig. S1D-S1G).”
  • At 8 weeks on FPC diet, liver steatosis is evident but prior to development of NASH.

    “when liver steatosis is evident but prior to the development of NASH 30”
  • Cholesterol and other mediators contribute to changes in transcriptional programmes in steatotic hepatocytes, leading to upregulation of developmental pathways such as Notch and TAZ, which can directly activate pro-fibrotic cell-cell communication between hepatocytes and neighbouring cells.

    “In parallel, cholesterol and other mediators contribute to changes in the transcriptional programmes in steatotic hepatocytes, leading to an upregulation of developmental pathways that are often seen in bipotential progenitor cells or ductular cells, such as Notch and TAZ, which can directly activate pro-fibrotic cell-cell communication between hepatocytes and neighbouring cells.[28], [29], [30]”

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Research works printed but not linked: 2

  1. Corey KE Kaplan LM Obesity and liver disease: the epidemic of the twenty-first century Clin Liver Dis 2014 18 1 18 24274861
  2. Rinella ME Nonalcoholic fatty liver disease: a systematic review JAMA 2015 313 2263 2273 26057287

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Authors
Wang, X., Zheng, Z., Caviglia, J. M., Corey, K. E., Herfel, T. M., Cai, B., Masia, R., Chung, R. T., Lefkowitch, J. H., Schwabe, R. F., & Tabas, I.
Affiliations
  • Columbia University Irving Medical Center (US)
  • Columbia University (US)
  • Harvard University (US)
  • Envigo (United States) (US)
Corresponding author
  • Wang, Xiaobo
  • Tabas, Ira
Venue
Cell Metabolism
Publisher
Elsevier BV
Published
2016-12
Volume
24
Issue
6
Pages
848-862
ISSN
1550-4131 (ISSN-L)
OpenAlex
W2541359632
Cited by
413
References
60
Citations by year
2026: 28 · 2025: 44 · 2024: 62 · 2023: 48 · 2022: 66 · 2021: 55 · 2020: 47 · 2019: 29 · 2018: 24 · 2017: 5 · 2016: 2
FWCI
18.76
Type
journal article
Language
en
Open access
Locations
  • Cell Metabolism (publishedVersion)
  • PubMed (publishedVersion)
  • Europe PMC (PubMed Central) (acceptedVersion)
  • PubMed Central (acceptedVersion)
Funders
  • NIH (HL087123, HL075662, DK078772, DK99422, R03DK101863)
  • AASLD Foundation
  • American Heart Association (UL1 TR000040)
Topics
  • Health Sciences › Medicine › Epidemiology › Liver Disease Diagnosis and Treatment
  • Health Sciences › Medicine › Hepatology › Liver physiology and pathology
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Cell Biology › Hippo pathway signaling and YAP/TAZ
Keywords
nonalcoholic steatohepatitis, hepatocytes, liver fibrosis, liver inflammation, Indian hedgehog, TEAD transcription factors, hepatic stellate cells, hepatocyte death, transcriptional regulation
MeSH terms
Transcriptional Coactivator with PDZ-Binding Motif Proteins, Animals, Base Sequence, Diet, Disease Models, Animal, Humans, Inflammation, Liver, Liver Cirrhosis, Male, Mice, Inbred C57BL, Transcription Factors, Trans-Activators, Cell Death, Disease Progression, Gene Silencing, Hepatocytes, Intracellular Signaling Peptides and Proteins, Adaptor Proteins, Signal Transducing, Hedgehog Proteins, Hepatic Stellate Cells, Non-alcoholic Fatty Liver Disease

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