title: Metastasis-associated protein 1 inhibits p53-induced apoptosis.
abstract: Metastasis-associated protein 1 (MTA1) is highly upregulated in cancer cells with metastatic potential; however, the molecular mechanism by which MTA1 increases the metastatic potential of cancer cells is far from clear. We characterized the functional consequences of MTA1 overexpression on p53-induced apoptosis of cancer cells. MTA1 was associated with p53 in a co-immunoprecipitation assay. MTA1 also had deacetylation activity on p53 in human non-small cell lung cancer cells H1299 and human hepatoma cells SK-Hep1. MTA1 attenuated the transactivation and p21 induction by p53. Moreover, MTA1 expression decreased p53-mediated apoptosis. These results indicate that MTA1 inhibits p53-induced apoptosis by deacetylation of p53, which might be related to the increased metastatic potential of cancer cells with high MTA1 expression.
authors.affiliation: Department of Medicine, Samsung Medical Center, Sungkyunkwan University School of Medicine, 50 Irwon-dong, Kangnam-ku, Seoul 135-710, Korea.
authors.forename: Hyo-Eun
authors.initials: HE
authors.lastname: Moon
authors.forename: Hwanju
authors.initials: H
authors.lastname: Cheon
authors.forename: Myung-Shik
authors.initials: MS
authors.lastname: Lee
mesh_terms: D000107:Acetylation; D017209:Apoptosis; D015153:Blotting, Western; D006528:Carcinoma, Hepatocellular / Q000378:metabolism / Q000473:pathology; D002478:Cells, Cultured; D050759:Cyclin-Dependent Kinase Inhibitor p21 / Q000378:metabolism; D015972:Gene Expression Regulation, Neoplastic; D006655:Histone Deacetylases / Q000494:pharmacology*; D006801:Humans; D047468:Immunoprecipitation; D007668:Kidney / Q000378:metabolism / Q000473:pathology; D008113:Liver Neoplasms / Q000378:metabolism / Q000473:pathology; D008156:Luciferases / Q000378:metabolism; D008175:Lung Neoplasms / Q000378:metabolism / Q000473:pathology; D012097:Repressor Proteins / Q000494:pharmacology*; D015534:Trans-Activators; D014158:Transcription, Genetic; D016159:Tumor Suppressor Protein p53 / Q000235:genetics / Q000378:metabolism*
chemical_list: D050759:Cyclin-Dependent Kinase Inhibitor p21; C089320:MTA1 protein, human; D012097:Repressor Proteins; D015534:Trans-Activators; D016159:Tumor Suppressor Protein p53; D008156:Luciferases; D006655:Histone Deacetylases