Identification of hyperoxidized PRDX3 as a ferroptosis marker reveals ferroptotic damage in chronic liver diseases.

Shaojie Cui, Anchal Ghai, Yaqin Deng, Shili Li, Ruihui Zhang, Christopher Egbulefu, Guosheng Liang, Samuel Achilefu, Jin Ye

Molecular cell 2023 Nov 02

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Ferroptosis, a regulated cell death pathway driven by accumulation of phospholipid peroxides, has been challenging to identify in physiological conditions owing to the lack of a specific marker. Here, we identify hyperoxidized peroxiredoxin 3 (PRDX3) as a marker for ferroptosis both in vitro and in vivo. During ferroptosis, mitochondrial lipid peroxides trigger PRDX3 hyperoxidation, a posttranslational modification that converts a Cys thiol to sulfinic or sulfonic acid. Once hyperoxidized, PRDX3 translocates from mitochondria to plasma membranes, where it inhibits cystine uptake, thereby causing ferroptosis. Applying hyperoxidized PRDX3 as a marker, we determined that ferroptosis is responsible for death of hepatocytes in mouse models of both alcoholic and nonalcoholic fatty liver diseases, the most prevalent chronic liver disorders. Our study highlights the importance of ferroptosis in pathophysiological conditions and opens the possibility to treat these liver diseases with drugs that inhibit ferroptosis. Copyright © 2023 Elsevier Inc. All rights reserved.

Citation

Shaojie Cui, Anchal Ghai, Yaqin Deng, Shili Li, Ruihui Zhang, Christopher Egbulefu, Guosheng Liang, Samuel Achilefu, Jin Ye. Identification of hyperoxidized PRDX3 as a ferroptosis marker reveals ferroptotic damage in chronic liver diseases. Molecular cell. 2023 Nov 02;83(21):3931-3939.e5