RHOJ, a small GTPase, could hold the key to the survival of tumor cells during cancer treatments. When epithelial cells transformed into mesenchymal cells, the Rho-related GTP-binding protein RhoJ regulated their resistance to chemotherapy. The scientists observed this mechanism in mouse models of skin squamous cell carcinoma, but their results could go beyond just one type of cancer. When the team started its experiments, which were published March 23, 2023, in Nature, “I had never heard about RHOJ before,” the lead author Cédric Blanpain told BioWorld. Blanpain is the director of the Laboratory of Stem Cells and Cancer at the Université Libre de Bruxelles (ULB).