Thy-1 (CD90)-Induced Metastatic Cancer Cell Migration and Invasion Are beta 3 Integrin-Dependent and Involve a Ca2+/P2X7 Receptor Signaling Axis

Brenet, Marianne; Martinez, Samuel; Perez-Nunez, Ramon; Perez, Leonardo A.; Contreras, Pamela; Diaz, Jorge; Avalos, Ana Maria; Schneider, Pascal; Quest, Andrew F. G.; Leyton, Lisette

Abstract

Cancer cell adhesion to the vascular endothelium is an important step in tumor metastasis. Thy-1 (CD90), a cell adhesion molecule expressed in activated endothelial cells, has been implicated in melanoma metastasis by binding to integrins present in cancer cells. However, the signaling pathway(s) triggered by this Thy-1-Integrin interaction in cancer cells remains to be defined. Our previously reported data indicate that Ca2+-dependent hemichannel opening, as well as the P2X7 receptor, are key players in Thy-1-alpha(V)beta(3) Integrin-induced migration of reactive astrocytes. Thus, we investigated whether this signaling pathway is activated in MDA-MB-231 breast cancer cells and in B16F10 melanoma cells when stimulated with Thy-1. In both cancer cell types, Thy-1 induced a rapid increase in intracellular Ca2+, ATP release, as well as cell migration and invasion. Connexin and Pannexin inhibitors decreased cell migration, implicating a requirement for hemichannel opening in Thy-1-induced cell migration. In addition, cell migration and invasion were precluded when the P2X7 receptor was pharmacologically blocked. Moreover, the ability of breast cancer and melanoma cells to transmigrate through an activated endothelial monolayer was significantly decreased when the beta(3) Integrin was silenced in these cancer cells. Importantly, melanoma cells with silenced beta(3) Integrin were unable to metastasize to the lung in a preclinical mouse model. Thus, our results suggest that the Ca2+/hemichannel/ATP/P2X7 receptor-signaling axis triggered by the Thy-1-alpha(V)beta(3) Integrin interaction is important for cancer cell migration, invasion and transvasation. These findings open up the possibility of therapeutically targeting the Thy-1-Integrin signaling pathway to prevent metastasis.

Más información

Título según WOS: ID WOS:000611510000001 Not found in local WOS DB
Título de la Revista: FRONTIERS IN CELL AND DEVELOPMENTAL BIOLOGY
Volumen: 8
Editorial: FRONTIERS MEDIA SA
Fecha de publicación: 2021
DOI:

10.3389/fcell.2020.592442

Notas: ISI