Researchers identified a stress-triggered molecular switch driving depression in Cellular and Molecular Life Sciences, adding to the growing map of how chronic stress rewires biology through specific signaling mechanisms. In oncology, a separate report described a molecular switch that helps breast cancer hide from PD-1 blockade, published in the Journal of Translational Medicine. The work points to a potential resistance lever relevant to immunotherapy selection and future combination strategies. Together, the updates show how mechanism-first studies are increasingly translating into therapeutic hypotheses—one in neuropsychiatric disease biology and one directly tied to immune escape under checkpoint inhibition.