McGill Scientists Discover Motile Vesicles That Shed Cancer DNA, Revealing New Clues to Metastasis

Researchers at the Research Institute of the McGill University Health Centre have identified a previously unknown type of extracellular vesicle released by migrating cancer cells. Published in Nature Cell Biology, the study shows that these motile vesicles, or MoVes, carry genetic material—including cancer-associated mutations—as cells move. The discovery challenges existing models of how tumor cells shed DNA and may explain how genetic information spreads beyond the primary tumor. Senior author Dr. Janusz Rak and colleagues observed MoVes in several cancer types, suggesting a conserved mechanism. The findings raise critical questions about whether these vesicles influence metastasis or the tumor microenvironment. Understanding MoVes could lead to new biomarkers for tracking cancer progression or novel therapeutic targets to block dissemination. This work underscores the dynamic nature of cancer cell communication and opens a new avenue in metastasis research.