Background:Liver ischemia/reperfusion (I/R) injury is usually caused by hepatic inflow occlusion during liver surgery, and is frequently observed during war wounds and trauma. Hepatocyte ferroptosis plays a critical role in liver I/R injury, however, it remains unclear whether this process is controlled or regulated by members of the DEAD/DExH-box helicase (DDX/DHX) family.Methods:The expression of DDX/DHX family members during liver I/R injury was screened using transcriptome analysis. Hepatocyte-specific Dhx58 knockout mice were constructed, and a partial liver I/R operation was performed. Single-cell RNA sequencing (scRNA-seq) in the liver post I/R suggested enhanced ferroptosis by Dhx58^hep−/−. The mRNAs and proteins associated with DExH-box helicase 58 (DHX58) were screened using RNA immunoprecipitation-sequencing (RIP-seq) and IP-mass spectrometry (IP-MS).Results:Excessive production of reactive oxygen species (ROS) decreased the expression of the interferon (IFN)-stimulated gene Dhx58 in hepatocytes and promoted hepatic ferroptosis, while treatment using IFN-α increased DHX58 expression and prevented ferroptosis during liver I/R injury. Mechanistically, DHX58 with RNA-binding activity constitutively associates with the mRNA of glutathione peroxidase 4 (GPX4), a central ferroptosis suppressor, and recruits the N⁶-methyladenosine (m⁶A) reader YT521-B homology domain containing 2 (YTHDC2) to promote the translation of Gpx4 mRNA in an m⁶A-dependent manner, thus enhancing GPX4 protein levels and preventing hepatic ferroptosis.Conclusions:This study provides mechanistic evidence that IFN-α stimulates DHX58 to promote the translation of m⁶A-modified Gpx4 mRNA, suggesting the potential clinical application of IFN-α in the prevention of hepatic ferroptosis during liver I/R injury.

Ischemia/reperfusion (I/R);DExH-box helicase 58 (DHX58);Glutathione peroxidase 4 (GPX4);N⁶-methyladenosine (m⁶A) modification;YT521-B homology domain containing 2 (YTHDC2)