cancers Article Uveal Melanoma-Derived Extracellular Vesicles Display Transforming Potential and Carry Protein Cargo Involved in Metastatic Niche Preparation Thupten Tsering 1, Alexander Laskaris 1, Mohamed Abdouh 1 , Prisca Bustamante 1 , Sabrina Parent 1 , Eva Jin 1, Sarah Tadhg Ferrier 1, Goffredo Arena 1,2,3 and Julia V. Burnier 1,4,* 1 Cancer Research Program, Research Institute of the McGill University Health Centre, 1001 Decarie Blvd, Montreal, QC H4A 3J1, Canada;
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[email protected] (G.A.) 2 Ospedale Giuseppe Giglio Fondazione San Raffaele Cefalu Sicily, 90015 Cefalu, Italy 3 Mediterranean Institute of Oncology, 95029 Viagrande, Italy 4 Experimental Pathology Unit, Department of Pathology, McGill University, QC H3A 2B4, Canada * Correspondence:
[email protected]; Tel.: +1-514-934-1934 (ext. 76307) Received: 13 September 2020; Accepted: 7 October 2020; Published: 11 October 2020 Simple Summary: Uveal melanoma is a rare but deadly cancer that shows remarkable metastatic tropism to the liver. Extracellular vesicles (EVs) are nanometer-sized, lipid bilayer-membraned particles that are released from cells. In our study we used EVs derived from primary normal choroidal melanocytes and matched primary and metastatic uveal melanoma cell lines from a patient. Analysis of these EVs revealed important protein signatures that may be involved in tumorigenesis and metastatic dissemination. We have established a model to study EV functions and phenotypes which can be used in EV-based liquid biopsy.