Cancer's Escape Trick May Backfire, Unlocking a New Immune Attack

Scientists found that when cancer cells reduce MHC I to dodge killer CD8+ T cells, they become more vulnerable to CD4+ T cells, which trigger ferroptosis. This reveals a surprising cross-talk in the immune system, challenging a long-held immunology principle and suggesting new approaches to cancer immunotherapy and bone marrow transplantation by leveraging CD4+ T cell activity against tumors and allogeneic targets.