Cancer is the leading cause of mortality in British Columbia. Whereas the immune system has long been recognized as an effective protection against infections, recent breakthroughs have demonstrated that the immune system also has the capacity to control cancer progression. Thus, cancer immunotherapies are being developed as a new type of treatment that acts by boosting the natural capacities of the immune system and directing it to destroy tumors. Amongst the different types of cells composing the immune system, professional phagocytes have the unique capacity to eliminate cancer cells by engulfing and digesting them. Subsequently, they are able to activate other immune cells, called lymphocytes, to mount an immune response specifically directed against the tumor. However, new evidence suggests that mechanical cues and physical constraints prevent phagocytes from using their anti-tumor potential. The goal of this project is to understand how phagocytes sense, respond and utilize mechanical forces to overcome physical constraints, with the aim to harness these mechanisms to develop more effective cancer immunotherapies.