Abstract
It is essential to further characterize liver injury aimed at developing novel therapeutic approaches. This study investigated the mechanistic basis of genipin against carbon tetrachloride (CCl4)-triggered acute liver injury concerning ferroptosis, a novel discovered modality of regulated cell death. All experiments were performed using hepatotoxic models upon CCl4 exposure in mice and human hepatocytes in vitro. Immunohistochemistry, immunoblotting, molecular docking, RNA-sequencing and ultra-high-performance liquid chromatography-tandem mass spectrometry (UHPLC-MS/MS) were conducted. CCl4 intoxication was manifested with lipid peroxidation-dictated ferroptotic cell death, together with changes in a cascade of ferroptosis-associated events and several regulatory pathways. Both the administration of genipin and ferrostatin-1 (Fer-1) significantly prevented this hepatotoxicity in response to CCl4 intoxication via upregulating GPX4 and xCT (i.e., critical regulators of ferroptosis). RNA-sequencing unraveled that arachidonic acid metabolism was considerably influenced upon genipin treatment. Accordingly, genipin treatment attenuated arachidonate 15-lipoxygenase (ALOX15)-launched lipid peroxidation in terms of UHPLC-MS/MS analysis and inflammation. In vitro, genipin supplementation rescued erastin-induced hepatocellular inviability and lipid ROS accumulation. The siRNA knockdown of GPX4 partially abrogated the protective effects of genipin on erastin-induced cytotoxicity, whereas the cytotoxicity was less severe in the presence of diminished ALOX15 expression in L-O2 cells. In conclusion, our findings uncovered that genipin treatment protects against CCl4-triggered acute liver injury by abrogating hepatocyte ferroptosis, wherein the pharmacological modification of dysregulated GPX4 and ALOX15-launched lipid peroxidation was responsible for underlying medicinal effects as molecular basis.
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The datasets used or analyzed during the current study are available from the corresponding author on reasonable request.
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Conception or design of the work: Xiaofei Fan, Xiaoyu Wang, Yangyang Hui and Chao Sun; Data collection: Tianming Zhao, Lihong Mao, Binxin Cui and Weilong Zhong; Drafting the article and critical revision of the article: Chao Sun; Final ap-proval of the version to be published: all authors.
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Xiaofei Fan, Xiaoyu Wang and Yangyang Hui contributed equally to this work.
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Fan, X., Wang, X., Hui, Y. et al. Genipin protects against acute liver injury by abrogating ferroptosis via modification of GPX4 and ALOX15-launched lipid peroxidation in mice. Apoptosis 28, 1469–1483 (2023). https://doi.org/10.1007/s10495-023-01867-9
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DOI: https://doi.org/10.1007/s10495-023-01867-9