Science advances · 2022
Dexamethasone sensitizes to ferroptosis by glucocorticoid receptor-induced dipeptidase-1 expression and glutathione depletion.
СтатьяПоддержка исследования: вне правительства СШАНазвание и аннотация: Перевод в очереди
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von Mässenhausen Anne, Zamora Gonzalez Nadia, Maremonti Francesca, Belavgeni Alexia, Tonnus Wulf, Meyer Claudia, Beer Kristina, Hannani Monica T, Lau Arthur, Peitzsch Mirko, Hoppenz Paul, Locke Sophie, Chavakis Triantafyllos, Kramann Rafael, Muruve Daniel A, Hugo Christian, Bornstein Stefan R, Linkermann Andreas
Аннотация
Dexamethasone is widely used as an immunosuppressive therapy and recently as COVID-19 treatment. Here, we demonstrate that dexamethasone sensitizes to ferroptosis, a form of iron-catalyzed necrosis, previously suggested to contribute to diseases such as acute kidney injury, myocardial infarction, and stroke, all of which are triggered by glutathione (GSH) depletion. GSH levels were significantly decreased by dexamethasone. Mechanistically, we identified that dexamethasone up-regulated the GSH metabolism regulating protein dipeptidase-1 (DPEP1) in a glucocorticoid receptor (GR)-dependent manner. DPEP1 knockdown reversed the phenotype of dexamethasone-induced ferroptosis sensitization. Ferroptosis inhibitors, the DPEP1 inhibitor cilastatin, or genetic DPEP1 inactivation reversed the dexamethasone-induced increase in tubular necrosis in freshly isolated renal tubules. Our data indicate that dexamethasone sensitizes to ferroptosis by a GR-mediated increase in DPEP1 expression and GSH depletion. Together, we identified a previously unknown mechanism of glucocorticoid-mediated sensitization to ferroptosis bearing clinical and therapeutic implications.