Adhesion of human ovarian adenocarcinoma IGROV1 cells to endothelial cells is partly mediated by the alphav integrins-vitronectin adhesive system and induces an alteration of endothelial integrity.
Several lines of evidence suggest that vascularization plays an important role in the growth, local expansion and dissemination of ovarian epithelial tumours. However, the interaction of ovarian carcinoma cells with the endothelium remains poorly understood. To investigate adhesive events underlying this process, we used an in vitro model of cocultures between the IGROV1 human ovarian adenocarcinoma cell line and human umbilical vein endothelial cells (HUVECs). IGROV1 cells were shown to adhere rapidly on the HUVECs monolayer. Adhesion was inhibited by anti-alphav integrin and anti-Vn blocking antibodies, but not by anti-beta1 integrin antibodies. Anchorage of carcinoma cells led to the rupture of endothelial integrity, as revealed by the formation of holes in the monolayer and by the disappearance of the interendothelial VE-Cadherin network. Considering the ability of ovarian carcinoma to disseminate by a haematogenous way, these in vitro events could mimic a preliminary step for carcinoma cells crossing the endothelial barrier to extravasate.
Leroy-Dudal
Johanne
J
ERRMECe, EA 1391, UFR Sciences et Techniques, 2 rue Adolphe Chauvin, 95302 Cergy-Pontoise Cedex, France.
Heyman
Loraine
L
Gauduchon
Pascal
P
Carreiras
Franck
F
D001808:Blood Vessels / Q000378:metabolism; D002448:Cell Adhesion; D045744:Cell Line, Tumor; D042783:Endothelial Cells / Q000166:cytology* / Q000378:metabolism*; D005260:Female; D006801:Humans; D039564:Integrin alphaV / Q000378:metabolism*; D010051:Ovarian Neoplasms / Q000378:metabolism*; D019096:Vitronectin / Q000378:metabolism*; D014841:von Willebrand Factor / Q000378:metabolism
D039564:Integrin alphaV; D019096:Vitronectin; D014841:von Willebrand Factor