Macrophage extracellular traps aggravate iron overload‐related liver ischaemia/reperfusion injury

Shan Wu; Jing Yang; Guoliang Sun; Jingping Hu; Qian Zhang; Jun Cai; Dongdong Yuan; Haobo Li; Ziqing Hei; Weifeng Yao

doi:10.1111/bph.15518

journal article Jun 13, 2021

Macrophage extracellular traps aggravate iron overload‐related liver ischaemia/reperfusion injury

Shan Wu

Jing Yang

Guoliang Sun Jingping Hu Qian Zhang

Jun Cai

Dongdong Yuan Haobo Li

Ziqing Hei Weifeng Yao

British Journal of Pharmacology Vol. 178 No. 18 pp. 3783-3796 · Wiley

View at Publisher Save 10.1111/bph.15518

Abstract

Background and PurposeMacrophages regulate iron homeostasis in the liver and play important role in hepatic ischaemia/reperfusion (I/R) injury. This study investigates the role of macrophages in iron overload‐related hepatocyte damage during liver I/R.Experimental ApproachLiver biopsies from patients undergoing partial hepatectomy with or without hepatic portal occlusion were recruited and markers of hepatocyte cell death and macrophage extracellular traps (METs) were detected. A murine hepatic I/R model was also established in high‐iron diet‐fed mice. Ferrostatin‐1 and deferoxamine were administered to investigate the role of ferroptosis in hepatic I/R injury. The macrophage inhibitor liposome‐encapsulated clodronate was used to investigate the interaction between macrophages and ferroptosis. AML12 hepatocytes and RAW264.7 macrophages were co‐cultured in vitro. An inhibitor of macrophage extracellular traps was used to evaluate the role and mechanism of these traps and ferroptosis in hepatic I/R injury.Key ResultsHepatocyte macrophage extracellular trap formation and ferroptosis were greater in patients who underwent hepatectomy with hepatic portal occlusion and in mice subjected to hepatic I/R. Macrophage extracellular traps increased when macrophages were subjected to hypoxia/reoxygenation and when they were co‐cultured with hepatocytes. Ferroptosis increased and post‐hypoxic hepatocyte survival decreased, which were reversed by inhibition of macrophage extracellular traps. Ferroptosis inhibition attenuated post‐ischaemic liver damage. Moreover, iron overload induced hepatic ferroptosis and exacerbated post‐ischaemic liver damage, which were reversed by the iron chelator.Conclusion and ImplicationsMacrophage extracellular traps are in volved in regulating ferroptosis highlighting the therapeutic potential of macrophage extracellular traps and ferroptosis inhibition in reducing liver I/R injury.

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Metrics

94

Citations

38

References

Details

Published: Jun 13, 2021
Vol/Issue: 178(18)
Pages: 3783-3796
License: View

Authors

S

Shan Wu

Department of Anesthesiology The Third Affiliated Hospital of Sun Yat‐sen University Guangzhou China; Department of Anesthesiology, Beijing Hospital, National Center of Gerontology, Institute of Geriatric Medicine Chinese Academy of Medical Sciences Beijing China

J

Jing Yang