2. Academic Validation
  3. Ferritinophagy mediated by the AMPK/ULK1 pathway is involved in ferroptosis subsequent to ventilator-induced lung injury

Ferritinophagy mediated by the AMPK/ULK1 pathway is involved in ferroptosis subsequent to ventilator-induced lung injury

  • Respir Res. 2024 Dec 24;25(1):440. doi: 10.1186/s12931-024-03076-7.
Huajin Ou # 1 2 3 4,  Jinyuan Lin # 1 2 3 4,  Liu Ji # 1 2 3 4,  Liu Ye 1 2 3 4,  Maoyao Ling 1 2 3 4,  Xiaoting Liao 1 2 3 4,  Fei Lin 1 2 3 4,  Yuqing Wang 1 2 3 4,  Bijun Luo 2 3 4 5,  Zhaokun Hu 1 2 3 4,  Linghui Pan 6 7 8 9
Affiliations

Affiliations

  • 1 Department of Anesthesiology, Guangxi Medical University Cancer Hospital, He Di Rd No.71, Nanning, 530021, P. R. China.
  • 2 Guangxi Engineering Research Center for Tissue & Organ Injury and Repair Medicine, Nanning, China.
  • 3 Guangxi Health Commission Key Laboratory of Basic Science and Prevention of Perioperative Organ Disfunction, Nanning, China.
  • 4 Guangxi Clinical Research Center for Anesthesiology, Nanning, China.
  • 5 Department of Anesthesiology, The Maternal and Child Health Care Hospital of Guangxi Zhuang Autonomous Region, Nanning, Guangxi, China.
  • 6 Department of Anesthesiology, Guangxi Medical University Cancer Hospital, He Di Rd No.71, Nanning, 530021, P. R. China. panlinghui@outlook.com.
  • 7 Guangxi Engineering Research Center for Tissue & Organ Injury and Repair Medicine, Nanning, China. panlinghui@outlook.com.
  • 8 Guangxi Health Commission Key Laboratory of Basic Science and Prevention of Perioperative Organ Disfunction, Nanning, China. panlinghui@outlook.com.
  • 9 Guangxi Clinical Research Center for Anesthesiology, Nanning, China. panlinghui@outlook.com.
  • # Contributed equally.
PMID: 39719634 DOI: 10.1186/s12931-024-03076-7
Abstract

Mechanical ventilation (MV) remains a cornerstone of critical care; however, its prolonged application can exacerbate lung injury, leading to ventilator-induced lung injury (VILI). Although previous studies have implicated Ferroptosis in the pathogenesis of VILI, the underlying mechanisms remain unclear. This study investigated the roles of ferritinophagy in Ferroptosis subsequent to VILI. Using C57BL/6J mice and MLE-12 cells, we established both in vivo and in vitro models of VILI and cyclic stretching (CS)-induced cellular injury. We assessed lung injury and the biomarkers of Ferroptosis and ferritinophagy, after appropriate pretreatments. This study demonstrated that high tidal volumes (HTV) for 4 h enhanced the sensitivity to Ferroptosis in both models, evidenced by increased intracellular iron levels, lipid peroxidation and cell death, which can be mitigated by ferrostatin-1 treatment. Notably, nuclear receptor coactivator 4 (NCOA4)-mediated ferritinophagy contributed to Ferroptosis in VILI. Inhibition of Autophagy with 3-methyladenine or NCOA4 knockdown decreased intracellular Fe2+ levels and inhibited lipid peroxidation, thereby attenuating CS-induced lung injury. Furthermore, it has also been observed that the AMPK/ULK1 axis can trigger ferritinophagy in VILI. Collectively, our study indicated that MV can induce Ferroptosis by promoting NCOA4-dependent ferritinophagy, which could be a novel therapeutic target for the prevention and treatment of VILI.

Keywords

AMPK-ULK1 axis; Ferritinophagy; Ferroptosis; Ventilation-induced lung injury.

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