title: Metastasis-associated protein 1 enhances stability of hypoxia-inducible factor-1alpha protein by recruiting histone deacetylase 1.
abstract: The expression of metastasis-associated protein 1 (MTA1) correlates well with tumor metastases; however, the associated molecular mechanism is not fully understood. Here, we explored the possibility of cross-talk between MTA1 and hypoxia-inducible factor-1alpha (HIF-1alpha), a key regulator of angiogenic factors. We observed that the expression of MTA1 was strongly induced under hypoxia in breast cancer cell lines such as MCF-7 and MDA-MB-231. When MTA1 was overexpressed, the transcriptional activity and stability of HIF-1alpha protein were enhanced. MTA1 and HIF-1alpha are physically associated in vivo and they were localized completely in the nucleus when coexpressed. MTA1 induced the deacetylation of HIF-1alpha by increasing the expression of histone deacetylase 1 (HDAC1). MTA1 counteracted to the action of acetyltransferase, ARD1, and it did not stabilize the HIF-1alpha mutant that lacks the acetylation site, K532R. These results indicate that acetylation is the major target of MTA1/HDAC1 function. Collectively, our data provide evidence of a positive cross-talk between HIF-1alpha and MTA1, which is mediated by HDAC1 recruitment, and indicate a close connection between MTA1-associated metastasis and HIF-1-induced tumor angiogenesis.
authors.affiliation: College of Pharmacy and Bio-MAX Institute, Seoul National University, Seoul, Korea.
authors.forename: Young-Gun
authors.initials: YG
authors.lastname: Yoo
authors.forename: Gu
authors.initials: G
authors.lastname: Kong
authors.forename: Mi-Ock
authors.initials: MO
authors.lastname: Lee
mesh_terms: D000107:Acetylation; D000123:Acetyltransferases / Q000378:metabolism; D015153:Blotting, Western; D002467:Cell Nucleus / Q000378:metabolism; D005260:Female; D005786:Gene Expression Regulation; D056284:Histone Deacetylase 1; D056572:Histone Deacetylase Inhibitors; D006655:Histone Deacetylases / Q000235:genetics / Q000378:metabolism*; D006801:Humans; D000860:Hypoxia; D051795:Hypoxia-Inducible Factor 1, alpha Subunit / Q000737:chemistry* / Q000235:genetics / Q000378:metabolism*; D047468:Immunoprecipitation; D063209:N-Terminal Acetyltransferase A; D063213:N-Terminal Acetyltransferase E; D034741:RNA, Small Interfering / Q000494:pharmacology; D012097:Repressor Proteins / Q000037:antagonists & inhibitors / Q000235:genetics / Q000378:metabolism*; D015534:Trans-Activators; D014158:Transcription, Genetic; D015533:Transcriptional Activation; D014407:Tumor Cells, Cultured
chemical_list: C497442:HIF1A protein, human; D056572:Histone Deacetylase Inhibitors; D051795:Hypoxia-Inducible Factor 1, alpha Subunit; C089320:MTA1 protein, human; D034741:RNA, Small Interfering; D012097:Repressor Proteins; D015534:Trans-Activators; D000123:Acetyltransferases; D063209:N-Terminal Acetyltransferase A; C504824:NAA10 protein, human; D063213:N-Terminal Acetyltransferase E; C110550:HDAC1 protein, human; D056284:Histone Deacetylase 1; D006655:Histone Deacetylases