Activated T Cells Break Tumor Immunosuppression by Macrophage Reeducation

In this study, we show a mechanism whereby T-cell activation controls the innate immune system and shapes the tumor microenvironment by reducing PGD2 production in TAMs. We suggest HPGDS inhibition as a promising strategy to treat refractory tumors to current immunotherapies or to overcome acquired resistance to immune checkpoint blockade.