title: p53 inhibits tumor cell invasion via the degradation of snail protein in hepatocellular carcinoma.
abstract: The tumor suppressor protein p53 is a key regulator of cell cycle arrest and apoptosis. Snail protein regulates cancer-associated malignancies. However, the relationship between p53 and Snail proteins in hepatocellular carcinoma (HCC) has not been completely understood. To determine whether Snail and p53 contribute to hepatocarcinogenesis, we analyzed the expression of Snail proteins in p53-overexpressing HCC cells. We found that p53 wild-type (WT) induced the degradation of Snail protein via murine double minute 2-mediated ubiquitination, whereas p53 mutant did not induce Snail degradation. As we expected, only p53WT induced endogenous Snail protein degradation and inhibited tumor cell invasion. These findings contribute to a better understanding of the role of p53 mutation and Snail overexpression as a late event in hepatocarcinogenesis.
authors.affiliation: Department of Biological Sciences, Seoul National University, Seoul, Republic of Korea.
authors.forename: Seung-Oe
authors.initials: SO
authors.lastname: Lim
authors.forename: Hongtae
authors.initials: H
authors.lastname: Kim
authors.forename: Guhung
authors.initials: G
authors.lastname: Jung
mesh_terms: D017209:Apoptosis / Q000235:genetics; D006528:Carcinoma, Hepatocellular / Q000235:genetics / Q000378:metabolism*; D002453:Cell Cycle / Q000235:genetics; D016158:Genes, p53; D006801:Humans; D008113:Liver Neoplasms / Q000235:genetics / Q000378:metabolism*; D000071250:Snail Family Transcription Factors; D014157:Transcription Factors / Q000235:genetics / Q000378:metabolism*; D016159:Tumor Suppressor Protein p53 / Q000235:genetics / Q000378:metabolism*; D054875:Ubiquitination
chemical_list: D000071250:Snail Family Transcription Factors; D014157:Transcription Factors; D016159:Tumor Suppressor Protein p53