title: Correlation of Snail expression with histological grade and lymph node status in breast carcinomas.
abstract: Snail is a zinc finger transcription factor that triggers the epithelial-mesenchymal transition (EMT) by directly repressing E-cadherin expression. Snail is required for mesoderm and neural crest formation during embryonic development and has recently been implicated in the EMT associated with tumour progression. In a series of human breast carcinomas, we have analysed the expression of Snail and that of molecules of the E-cadherin/catenin complexes. We have also correlated these data with the pathological features of the tumours. We show that Snail expression inversely correlates with the grade of differentiation of the tumours and that it is expressed in all the infiltrating ductal carcinomas (IDC) presenting lymph node metastases that were analysed. In addition, Snail is expressed in some dedifferentiated tumours with a negative nodal status. Considering that Snail is involved in the induction of the invasive and migratory phenotype in epithelial cells, these results indicate that it is also involved in the progression of breast ductal tumours, where it could additionally serve as a marker of the metastatic potential.
authors.affiliation: Instituto Cajal, CSIC, Doctor Arce 37, 28002 Madrid, Spain.
authors.forename: Maria J
authors.initials: MJ
authors.lastname: Blanco
authors.forename: Gema
authors.initials: G
authors.lastname: Moreno-Bueno
authors.forename: David
authors.initials: D
authors.lastname: Sarrio
authors.forename: Annamaria
authors.initials: A
authors.lastname: Locascio
authors.forename: Amparo
authors.initials: A
authors.lastname: Cano
authors.forename: José
authors.initials: J
authors.lastname: Palacios
authors.forename: M Angela
authors.initials: MA
authors.lastname: Nieto
mesh_terms: D001943:Breast Neoplasms / Q000737:chemistry / Q000235:genetics* / Q000473:pathology; D015820:Cadherins / Q000032:analysis; D018270:Carcinoma, Ductal, Breast / Q000737:chemistry / Q000235:genetics* / Q000473:pathology; D018275:Carcinoma, Lobular / Q000737:chemistry / Q000235:genetics / Q000473:pathology; D002454:Cell Differentiation; D003598:Cytoskeletal Proteins / Q000032:analysis; D004268:DNA-Binding Proteins / Q000032:analysis / Q000235:genetics / Q000502:physiology*; D051180:Desmoplakins; D018450:Disease Progression; D004847:Epithelial Cells / Q000473:pathology; D005260:Female; D006801:Humans; D008207:Lymphatic Metastasis / Q000235:genetics*; D009361:Neoplasm Invasiveness; D009362:Neoplasm Metastasis; D009363:Neoplasm Proteins / Q000032:analysis / Q000235:genetics / Q000502:physiology*; D010641:Phenotype; D011960:Receptors, Estrogen / Q000032:analysis; D011980:Receptors, Progesterone / Q000032:analysis; D000071250:Snail Family Transcription Factors; D015534:Trans-Activators; D014157:Transcription Factors / Q000032:analysis / Q000235:genetics / Q000502:physiology*; D051176:beta Catenin
chemical_list: C495270:CTNNB1 protein, human; D015820:Cadherins; D003598:Cytoskeletal Proteins; D004268:DNA-Binding Proteins; D051180:Desmoplakins; D009363:Neoplasm Proteins; D011960:Receptors, Estrogen; D011980:Receptors, Progesterone; D000071250:Snail Family Transcription Factors; D015534:Trans-Activators; D014157:Transcription Factors; D051176:beta Catenin