The rise of reducing reagent-resistant TfR1 dimer marks ferroptosis.

A reducing reagent-resistant (3R) dimer of TfR1 is a highly specific indicator for lipid peroxidation during ferroptosis, with levels elevated in cells undergoing this form of cell death.

• Why it matters: Detecting ferroptotic cells in vivo remains difficult, limiting the understanding and potential treatment of diseases involving ferroptosis. Identifying reliable markers could improve diagnosis and research.
• What they did: Researchers identified the 3R TfR1 dimer as a marker that increases when ferroptosis is induced by drugs or genetic changes, and demonstrated its use in tissue and extracellular vesicles from mouse and patient plasma.
• The result: The 3R TfR1 dimer offers a promising, widespread marker for ferroptosis, enabling better detection in research and clinical settings, and advancing studies of ferroptosis-related diseases.