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Finding immune cells that stop a body from attacking itself wins medicine Nobel


Shimon Sakaguchi discovered T-reg immune cells. Mary Brunkow and Fred Ramsdell identified the cells’ role in autoimmune disease.

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2025 Nobel Prize in Physiology or Medicine Awarded for Discoveries Key to Treating Autoimmune Disease

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Mary E. Brunkow, Fred Ramsdell, and Shimon Sakaguchi won the 2025 Nobel Prize in Medicine for discovering how the body prevents autoimmune diseases through “peripheral immune tolerance.” Sakaguchi identified regulatory T cells in 1995, while Brunkow and Ramsdell later linked them to the Foxp3 gene.

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Nobel prize for medicine goes to trio for work on immune tolerance