E-Cadherin fragments as potential mediators for peritoneal metastasis in advanced epithelial ovarian cancer.
Br J Cancer
; 114(2): 213-20, 2016 Jan 19.
Article
em En
| MEDLINE
| ID: mdl-26757261
ABSTRACT
BACKGROUND:
Peritoneal dissemination and retroperitoneal lymph node involvement are main routes for tumour spread of epithelial ovarian cancer (EOC), possibly determined by the intercellular connecting protein E-Cadherin (E-Cad) and its fragments.METHODS:
Tumour tissue of 105 advanced EOC patients was evaluated for protein expression of E-Cad, ß-Catenin and Calpain by western blotting and immunohistochemistry. Expression patterns were compared between tumours with solely intraperitoneal (pT3c, pN0; n=41) and tumours with retroperitoneal metastases (pT1a-3c, pN1; n=64). Lysates of the EOC cell line SKOV3 and tumour tissue from the intraperitoneal group were tested for E-Cad expression following Calpain treatment.RESULTS:
E-Cad full-length (E-Cad-FL, 120 kDa) and two major fragments at 85 kDa (E-Cad-85) and 23 kDa (E-Cad-23) were detected by western blotting. E-Cad-85 expression was significantly higher in tumours with solely intraperitoneal metastases and correlated strongly with E-Cad-23 and the protease Calpain. Calpain-mediated cleavage was identified as a potential mechanism to generate E-Cad-85 from E-Cad-FL by treating lysates from SKOV3 cells and tumour tissue with this enzyme. Increased cytoplasmic localisation of ß-Catenin in tumours with high E-Cad-85 expression corroborates that E-Cad-85 loses the binding site for ß-Catenin after fragmentation, enabling tumour cluster formation and peritoneal dissemination.CONCLUSIONS:
Calpain-mediated E-Cad fragmentation appears to promote intraperitoneal EOC progression. Understanding these mechanisms might eventually lead to new tailored subtype-specific diagnostic and therapeutic interventions.
Texto completo:
1
Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Neoplasias Ovarianas
/
Fragmentos de Peptídeos
/
Neoplasias Peritoneais
/
Neoplasias Retroperitoneais
/
Calpaína
/
Caderinas
/
Neoplasias Epiteliais e Glandulares
/
Beta Catenina
/
Linfonodos
Tipo de estudo:
Observational_studies
Limite:
Adult
/
Aged
/
Aged80
/
Female
/
Humans
/
Middle aged
Idioma:
En
Revista:
Br J Cancer
Ano de publicação:
2016
Tipo de documento:
Article
País de afiliação:
Alemanha