title: MTA3, a Mi-2/NuRD complex subunit, regulates an invasive growth pathway in breast cancer.
abstract: Estrogen receptor is a key regulator of proliferation and differentiation in mammary epithelia and represents a crucial prognostic indicator and therapeutic target in breast cancer. Mechanistically, estrogen receptor induces changes in gene expression through direct gene activation and also through the biological functions of target loci. Here, we identify the product of human MTA3 as an estrogen-dependent component of the Mi-2/NuRD transcriptional corepressor in breast epithelial cells and demonstrate that MTA3 constitutes a key component of an estrogen-dependent pathway regulating growth and differentiation. The absence of estrogen receptor or of MTA3 leads to aberrant expression of the transcriptional repressor Snail, a master regulator of epithelial to mesenchymal transitions. Aberrant Snail expression results in loss of expression of the cell adhesion molecule E-cadherin, an event associated with changes in epithelial architecture and invasive growth. These results establish a mechanistic link between estrogen receptor status and invasive growth of breast cancers.
authors.affiliation: Emory University School of Medicine, Department of Pathology, Whitehead Biomedical Research Building, Room 142, 615 Michael Street, Atlanta, GA 30322, USA.
authors.forename: Naoyuki
authors.initials: N
authors.lastname: Fujita
authors.forename: David L
authors.initials: DL
authors.lastname: Jaye
authors.forename: Masahiro
authors.initials: M
authors.lastname: Kajita
authors.forename: Cissy
authors.initials: C
authors.lastname: Geigerman
authors.forename: Carlos S
authors.initials: CS
authors.lastname: Moreno
authors.forename: Paul A
authors.initials: PA
authors.lastname: Wade
mesh_terms: D000595:Amino Acid Sequence / Q000235:genetics; D001483:Base Sequence / Q000235:genetics; D001943:Breast Neoplasms / Q000235:genetics* / Q000378:metabolism; D015820:Cadherins / Q000235:genetics / Q000378:metabolism; D002277:Carcinoma / Q000235:genetics* / Q000378:metabolism; D002454:Cell Differentiation / Q000235:genetics; D002455:Cell Division / Q000235:genetics; D002471:Cell Transformation, Neoplastic / Q000235:genetics* / Q000378:metabolism; D004252:DNA Mutational Analysis; D004268:DNA-Binding Proteins / Q000235:genetics / Q000378:metabolism; D004847:Epithelial Cells / Q000378:metabolism / Q000473:pathology; D005260:Female; D015972:Gene Expression Regulation, Neoplastic / Q000235:genetics*; D006367:HeLa Cells; D006655:Histone Deacetylases / Q000235:genetics / Q000378:metabolism*; D006801:Humans; D056245:Mi-2 Nucleosome Remodeling and Deacetylase Complex; D008969:Molecular Sequence Data; D009363:Neoplasm Proteins / Q000235:genetics / Q000378:metabolism*; D011960:Receptors, Estrogen / Q000235:genetics / Q000378:metabolism*; D012097:Repressor Proteins / Q000235:genetics; D000071250:Snail Family Transcription Factors; D014157:Transcription Factors / Q000235:genetics / Q000378:metabolism; D015533:Transcriptional Activation
chemical_list: D015820:Cadherins; D004268:DNA-Binding Proteins; C486657:MTA3 protein, human; D009363:Neoplasm Proteins; D011960:Receptors, Estrogen; D012097:Repressor Proteins; D000071250:Snail Family Transcription Factors; D014157:Transcription Factors; D006655:Histone Deacetylases; D056245:Mi-2 Nucleosome Remodeling and Deacetylase Complex