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FUNDC1 interacts with GPx4 to govern hepatic ferroptosis and fibrotic injury through a mitophagy-dependent manner

Authors :
Yaguang Bi
Shuolin Liu
Xing Qin
Miyesaier Abudureyimu
Lu Wang
Rongjun Zou
Amir Ajoolabady
Wenjing Zhang
Hu Peng
Jun Ren
Yingmei Zhang
Source :
Journal of Advanced Research, Vol 55, Iss , Pp 45-60 (2024)
Publication Year :
2024
Publisher :
Elsevier, 2024.

Abstract

Introduction: Liver fibrosis is a life-threatening pathological anomaly which usually evolves into advanced liver cirrhosis and hepatocellular carcinoma although limited therapeutic option is readily available. FUN14 domain containing 1 (FUNDC1) is a mitophagy receptor with little information in liver fibrosis. Objective: This study was designed to examine the role for FUNDC1 in carbon tetrachloride (CCl4)-induced liver injury. Methods: GEO database analysis and subsequent validation of biological processes including western blot, immunofluorescence, and co-immunoprecipitation were applied to clarify the regulatory role of FUNDC1 on mitophagy and ferroptosis. Results: Our data revealed elevated FUNDC1 levels in liver tissues of patients with liver fibrotic injury and CCl4-challenged mice. FUNDC1 deletion protected against CCl4-induced hepatic anomalies in mice. Moreover, FUNDC1 deletion ameliorated CCl4-induced ferroptosis in vivo and in vitro. Mechanically, FUNDC1 interacted with glutathione peroxidase (GPx4), a selenoenzyme to neutralize lipid hydroperoxides and ferroptosis, via its 96–133 amino acid domain to facilitate GPx4 recruitment into mitochondria from cytoplasm. GPx4 entered mitochondria through mitochondrial protein import system-the translocase of outer membrane/translocase of inner membrane (TOM/TIM) complex, prior to degradation of GPx4 mainly through mitophagy along with ROS-induced damaged mitochondria, resulting in hepatocyte ferroptosis. Conclusion: Taken together, our data favored that FUNDC1 promoted hepatocyte injury through GPx4 binding to facilitate its mitochondrial translocation through TOM/TIM complex, where GPx4 was degraded by mitophagy to trigger ferroptosis. Targeting FUNDC1 may be a promising therapeutic approach for liver fibrosis.

Details

Language :
English
ISSN :
20901232
Volume :
55
Issue :
45-60
Database :
Directory of Open Access Journals
Journal :
Journal of Advanced Research
Publication Type :
Academic Journal
Accession number :
edsdoj.2fe01d001a7411dbd62d8473bb71797
Document Type :
article
Full Text :
https://doi.org/10.1016/j.jare.2023.02.012