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Brunkow, Ramsdell and Sakaguchi Win 2025 Nobel in Medicine for Immune Tolerance

Work on regulatory T cells and the FOXP3 gene now guides efforts to curb autoimmunity, improve transplants, manage allergies, refine cancer immunotherapy.

Overview

  • The Nobel Committee in Stockholm named Mary Brunkow, Fred Ramsdell and Shimon Sakaguchi laureates for discoveries explaining peripheral immune tolerance.
  • Sakaguchi identified regulatory T cells as a distinct lymphocyte class that prevents the immune system from attacking the body’s own tissues.
  • Brunkow and Ramsdell helped link FOXP3 mutations to dysfunctional Tregs and human disease, including the IPEX syndrome, establishing a genetic basis for failed tolerance.
  • Experts say the findings have been repeatedly validated and now underpin targeted approaches for autoimmune disorders, allergy desensitization, transplant success and oncology.
  • The prize totals 11 million Swedish kronor, to be shared equally, with formal award ceremonies scheduled for 10 December.