HMGB1 and cancer: The authors compared the effects of early and late ferroptotic cancer cells (MCA205 cells treated with RSL3 for 1 h and 24 h, respectively) on the maturation of murine bone marrow–derived dendritic cells (BMDCs) and concluded that the former released HMGB1 and that ATP contributed to the maturation of BMDCs, whereas the latter did not.