The role of ZEB1 in the inflammation-induced promotion of EMT in HNSCC.
Otolaryngol Head Neck Surg
; 142(5): 753-9, 2010 May.
Article
em En
| MEDLINE
| ID: mdl-20416468
ABSTRACT
OBJECTIVES:
To determine the role of ZEB1 in the inflammation-induced promotion of the epithelial-mesenchymal transition (EMT) in head and neck squamous cell carcinoma (HNSCC). STUDYDESIGN:
A molecular biology study. Real-time quantitative reverse-transcriptase polymerase chain reaction (RT-PCR), Western blot analysis, and immunohistochemical staining of human HNSCC tissue sections were used to determine how inflammation affects the transcriptional repressor, ZEB1.SETTING:
An academic hospital laboratory. SUBJECTS ANDMETHODS:
Relative ZEB1 RNA levels were determined by RT-PCR, and protein expression was evaluated in situ by immunohistochemical staining of human HNSCC tissue sections.RESULTS:
IL-1beta-treated HNSCC cell lines demonstrated a significant decrease in E-cadherin mRNA and an increase in the mRNA expression of the transcriptional repressor ZEB1. IL-1beta exposure led to enhanced ZEB1 binding at the chromatin level, as determined by chromatin immunoprecipitation assays (ChIP). An inverse relationship between ZEB1 and E-cadherin was demonstrated in situ by immunohistochemical staining of human HNSCC tissue sections.CONCLUSIONS:
Our recent investigations indicate that inflammatory mediators are potent regulators of EMT in HNSCC. This is the first report indicating the role of ZEB1 in the inflammation-induced promotion of EMT in HNSCC. This newly defined pathway for transcriptional regulation of E-cadherin in HNSCC has important implications for targeted chemoprevention and therapy.
Texto completo:
1
Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Fatores de Transcrição
/
Carcinoma de Células Escamosas
/
Células Epiteliais
/
Neoplasias de Cabeça e Pescoço
/
Inflamação
/
Mesoderma
Limite:
Humans
Idioma:
En
Revista:
Otolaryngol Head Neck Surg
Ano de publicação:
2010
Tipo de documento:
Article