ETH Zurich Jun 15 2026 Researchers from ETH Zurich have developed a molecular switch that is controlled by light. It wakes lung cancer cells up from a protective dormant state so that they are more accessible for treatment. Tumor cells can lapse into a sleep-like state and thereby evade the destructive effect of cancer drugs. In some types of the disease, such as certain forms of lung cancer, this state is triggered by stress hormones in the body. Inside the cancer cells, glucocorticoid