Cited by 127Liver Disease Diagnosis and TreatmentLiver physiology and pathologyDrug-Induced Hepatotoxicity and Protection

p53/p66Shc-mediated signaling contributes to the progression of non-alcoholic steatohepatitis in humans and mice

Tomita, Kengo, Teratani, Toshiaki, Suzuki, Takahiro, Oshikawa, Tetsuya, Yokoyama, Hirokazu, Shimamura, Katsuyoshi, Nishiyama, Kiyoshi, Mataki, Norikazu +15 more·2012·Journal of Hepatology

Abstract

Background & aims The tumor suppressor p53 is a primary sensor of stressful stimuli, controlling a number of biologic processes. The aim of our study was to examine the roles of p53 in non-alcoholic steatohepatitis (NASH).Methods Male wild type and p53-deficient mice were fed a methionine- and choline-deficient diet for 8 weeks to induce nutritional steatohepatitis. mRNA expression profiles in normal liver samples and liver samples from patients with non-alcoholic liver disease (NAFLD) were also evaluated.Results Hepatic p53 and p66Shc signaling was enhanced in the mouse NASH model. p53 deficiency suppressed the enhanced p66Shc signaling, decreased hepatic lipid peroxidation and the number of apoptotic hepatocytes, and ameliorated progression of nutritional steatohepatitis. In primary cultured hepatocytes, transforming growth factor (TGF)-β treatment increased p53 and p66Shc signaling, leading to exaggerated reactive oxygen species (ROS) accumulation and apoptosis. Deficient p53 signaling inhibited TGF-β-induced p66Shc signaling, ROS accumulation, and hepatocyte apoptosis. Furthermore, expression levels of p53, p21, and p66Shc were significantly elevated in human NAFLD liver samples, compared with results obtained with normal liver samples. Among NAFLD patients, those with NASH had significantly higher hepatic expression levels of p53, p21, and p66Shc compared with the group with simple steatosis. A significant correlation between expression levels of p53 and p66Shc was observed.Conclusions p53 in hepatocytes regulates steatohepatitis progression by controlling p66Shc signaling, ROS levels, and apoptosis, all of which may be regulated by TGF-β. Moreover, p53/p66Shc signaling in the liver appears to be a promising target for the treatment of NASH.

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Crossref · 10.1016/j.jhep.2012.05.013

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  • Senescent hepatocytes are involved in the activation of hepatic stellate cells and the development of liver fibrosis.

    “This finding supports the involvement of senescent hepatocytes in the activation of hepatic stellate cells and the development of liver fibrosis.”
  • In p53-deficient mice with nutrition-induced steatohepatitis, reduced levels of hepatocyte p21 and decreased activation of hepatic stellate cells and expression of fibrotic markers such as SMA and collagen were observed.

    “It was discovered that these mice displayed reduced levels of hepatocyte p21, as well as decreased activation of hepatic stellate cells and expression of fibrotic markers such as SMA and collagen.156”

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Authors
Tomita, K., Teratani, T., Suzuki, T., Oshikawa, T., Yokoyama, H., Shimamura, K., Nishiyama, K., Mataki, N., Irie, R., Minamino, T., Okada, Y., Kurihara, C., Ebinuma, H., Saito, H., Shimizu, I., Yoshida, Y., Hokari, R., Sugiyama, K., Hatsuse, K., Yamamoto, J., Kanai, T., Miura, S., & Hibi, T.
Affiliations
  • Keio University (JP)
  • National Defense Medical College Hospital (JP)
  • Kawasaki Municipal Hospital (JP)
  • Chiba University (JP)
Corresponding author
Tomita, Kengo
Venue
Journal of Hepatology
Publisher
Elsevier BV
Published
2012-10
Volume
57
Issue
4
Pages
837-843
ISSN
0168-8278 (ISSN-L)
OpenAlex
W1973185531
Cited by
127
References
29
Citations by year
2026: 6 · 2025: 11 · 2024: 9 · 2023: 12 · 2022: 13 · 2021: 17 · 2020: 11 · 2019: 6 · 2018: 11 · 2017: 5 · 2016: 4 · 2015: 5 · 2014: 8 · 2013: 7 · 2012: 2
FWCI
5.23
Type
journal article
Language
en
Open access
closed
Locations
  • Journal of Hepatology (publishedVersion)
  • PubMed (publishedVersion)
Funders
  • National Defense Medical College
  • Ministry of Education, Culture, Sports, Science and Technology
Topics
  • Health Sciences › Medicine › Epidemiology › Liver Disease Diagnosis and Treatment
  • Health Sciences › Medicine › Hepatology › Liver physiology and pathology
  • Life Sciences › Pharmacology, Toxicology and Pharmaceutics › Pharmacology › Drug-Induced Hepatotoxicity and Protection
Keywords
p53, p66Shc, nonalcoholic steatohepatitis, non-alcoholic fatty liver disease, TGF-beta signaling, reactive oxygen species, hepatocyte apoptosis, lipid peroxidation, p21, methionine-choline-deficient diet, p53-deficient mice
MeSH terms
Src Homology 2 Domain-Containing, Transforming Protein 1, Animals, Choline Deficiency, Disease Models, Animal, Fatty Liver, Humans, Male, Methionine, Mice, Inbred C57BL, RNA, Messenger, Signal Transduction, Up-Regulation, Tumor Suppressor Protein p53, Transforming Growth Factor beta, Proto-Oncogene Proteins p21(ras), Apoptosis, Reactive Oxygen Species, Mice, Knockout, Disease Progression, Hepatocytes, Cyclin-Dependent Kinase Inhibitor p21, Mice, Caspase 3, Shc Signaling Adaptor Proteins, Primary Cell Culture, Non-alcoholic Fatty Liver Disease

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