The oncogene RAS is often found in non-small cell lung tumors or other types of cancer. This "cancer gene" fuels tumor growth and, until now, could not be specifically switched off. However, researchers at the University of Ulm have now discovered a new function of the so-called glucocorticoid receptor: In interaction with RAS proteins on the cytoplasmic side of the cell membrane, the receptor can slow down tumor growth. The road to concrete therapeutic approaches is still long, but the study has already made it onto the cover of the scientific journal "Science Signaling".