Renal failure · 2025
Maresin-1 alleviates sepsis-induced acute kidney injury by inhibiting ferroptosis via the Nrf2/HO-1/Gpx4 signaling pathway.
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Tang Lili, He Dongrui, Wan Pengyu, Gou Xingzhu, Wang Yuhao, Li Xiaoyue
Аннотация
PURPOSE: Sepsis-induced acute kidney injury (S-AKI) is a severe complication of sepsis. This study aimed to explore the protective effects of Maresin-1 (MaR-1) on S-AKI and elucidate its potential molecular mechanisms, focusing on ferroptosis and the Nrf2/HO-1/GPx4 signaling pathway.
METHODS: In vitro cellular experiments and in vivo mouse models of S-AKI were employed. Cell viability, ferroptosis-related markers (reactive oxygen species [ROS], malondialdehyde [MDA], and iron ion concentration), and antioxidant protein expression were analyzed. The Nrf2/HO-1/GPx4 signaling pathway was examined using Western blotting. In vivo, renal injury markers (blood urea nitrogen [BUN], serum creatinine [SCr], and neutrophil gelatinase-associated lipocalin [NGAL]) and ferroptosis indicators in kidney tissues were assessed. Nrf2 knockdown was used to validate its role in MaR-1-mediated effects.
RESULTS: MaR-1 significantly improved cell viability and reduced ferroptosis-related markers (ROS, MDA, and iron ion concentration) in vitro. It also upregulated antioxidant proteins through theNrf2/HO-1/GPx4 signaling pathway. In the mouse model, MaR-1 administration decreased renal injury markers (BUN, SCr, NGAL) and ferroptosis-related indicators in kidney tissues. Nrf2 knockdown markedly attenuated MaR-1's protective effects,highlighting the essential role of this pathway in mitigating ferroptosis.
CONCLUSIONS: This study demonstrates that MaR-1 alleviates S-AKI by inhibiting ferroptosis through activation of theNrf2/HO-1/GPx4 signaling pathway. These findings provide insights into the potential therapeutic application of MaR-1 for S-AKI.
METHODS: In vitro cellular experiments and in vivo mouse models of S-AKI were employed. Cell viability, ferroptosis-related markers (reactive oxygen species [ROS], malondialdehyde [MDA], and iron ion concentration), and antioxidant protein expression were analyzed. The Nrf2/HO-1/GPx4 signaling pathway was examined using Western blotting. In vivo, renal injury markers (blood urea nitrogen [BUN], serum creatinine [SCr], and neutrophil gelatinase-associated lipocalin [NGAL]) and ferroptosis indicators in kidney tissues were assessed. Nrf2 knockdown was used to validate its role in MaR-1-mediated effects.
RESULTS: MaR-1 significantly improved cell viability and reduced ferroptosis-related markers (ROS, MDA, and iron ion concentration) in vitro. It also upregulated antioxidant proteins through theNrf2/HO-1/GPx4 signaling pathway. In the mouse model, MaR-1 administration decreased renal injury markers (BUN, SCr, NGAL) and ferroptosis-related indicators in kidney tissues. Nrf2 knockdown markedly attenuated MaR-1's protective effects,highlighting the essential role of this pathway in mitigating ferroptosis.
CONCLUSIONS: This study demonstrates that MaR-1 alleviates S-AKI by inhibiting ferroptosis through activation of theNrf2/HO-1/GPx4 signaling pathway. These findings provide insights into the potential therapeutic application of MaR-1 for S-AKI.