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ZFIN ID: ZDB-PUB-140410-6
UHRF1 overexpression drives DNA hypomethylation and hepatocellular carcinoma
Mudbhary, R., Hoshida, Y., Chernyavskaya, Y., Jacob, V., Villanueva, A., Fiel, M.I., Chen, X., Kojima, K., Thung, S., Bronson, R.T., Lachenmayer, A., Revill, K., Alsinet, C., Sachidanandam, R., Desai, A., SenBanerjee, S., Ukomadu, C., Llovet, J.M., and Sadler, K.C.
Date: 2014
Source: Cancer Cell 25(2): 196-209 (Journal)
Registered Authors: Chernyavskaya, Yelena, Jacob, Vinitha, Mudbhary, Raksha, Sadler Edepli, Kirsten C.
Keywords: none
Microarrays: GEO:GSE52605
MeSH Terms:
  • Animals
  • CCAAT-Enhancer-Binding Proteins/genetics
  • CCAAT-Enhancer-Binding Proteins/metabolism*
  • Carcinoma, Hepatocellular/genetics
  • Carcinoma, Hepatocellular/mortality
  • Carcinoma, Hepatocellular/pathology*
  • Cells, Cultured
  • Cellular Senescence
  • Cohort Studies
  • Computational Biology
  • DNA Methylation*
  • Hepatocytes/cytology
  • Hepatocytes/metabolism
  • Humans
  • Immunoblotting
  • Liver/metabolism
  • Liver/pathology
  • Liver Neoplasms/genetics
  • Liver Neoplasms/metabolism
  • Liver Neoplasms/pathology*
  • Mutation/genetics
  • Prognosis
  • Survival Rate
  • Tumor Suppressor Protein p53/genetics
  • Tumor Suppressor Protein p53/metabolism
  • Zebrafish
PubMed: 24486181 Full text @ Cancer Cell

Ubiquitin-like with PHD and RING finger domains 1 (UHRF1) is an essential regulator of DNA methylation that is highly expressed in many cancers. Here, we use transgenic zebrafish, cultured cells, and human tumors to demonstrate that UHRF1 is an oncogene. UHRF1 overexpression in zebrafish hepatocytes destabilizes and delocalizes Dnmt1 and causes DNA hypomethylation and Tp53-mediated senescence. Hepatocellular carcinoma (HCC) emerges when senescence is bypassed. tp53 mutation both alleviates senescence and accelerates tumor onset. Human HCCs recapitulate this paradigm, as UHRF1 overexpression defines a subclass of aggressive HCCs characterized by genomic instability, TP53 mutation, and abrogation of the TP53-mediated senescence program. We propose that UHRF1 overexpression is a mechanism underlying DNA hypomethylation in cancer cells and that senescence is a primary means of restricting tumorigenesis due to epigenetic disruption.