A Stat1 bound enhancer promotes Nampt expression and function within tumor associated macrophages

IFNy can polarize macrophages in the tumour microenvironment to an inflammatory state and thereby contributes to their anti-tumour function. Here the authors show an underlying mechanism in this process is IFNy-driven STAT1 occupancy and activation of NRE1, a regulatory region within the NAMPT gene, thereby implicating inducible NAD salvage synthesis in TAM functions.