Article 2026-04-22 under-review v1

Targeting VPS35-ZNT1 Interaction by Engeletin Prevents Zinc Overload and Alleviates Myocardial Ischemia-Reperfusion Injury via Surface ZNT1 Stabilization

J
Junbo Ge Department of Cardiology, Zhongshan Hospital, Fudan University
J
Jian Zhang Department of Cardiology, Zhongshan Hospital, Fudan University
R
Rong Huang Department of Cardiology, Zhongshan Hospital, Fudan University
J
Jiayu Liang Department of Cardiology, Zhongshan Hospital, Fudan University
Y
Yang Gao Department of Cardiology, Zhongshan Hospital, Fudan University
S
Shiyu Hu Department of Cardiology, Zhongshan Hospital, Fudan University
J
Jingpu Wang Department of Cardiology, Zhongshan Hospital, Fudan University
Y
Yiwen Wang Department of Cardiology, Zhongshan Hospital, Fudan University
Y
Yanan Qu Department of Cardiology, Zhongshan Hospital, Fudan University
J
Jinyi Lin Department of Cardiology, Zhongshan Hospital, Fudan University
J
Jucheng Liu Department of Cardiology, Zhongshan Hospital, Fudan University
K
Ke Meng Department of Cardiology, The First Affiliated Hospital of USTC, Division of Life Sciences and Medicine, University of Science and Technology of China
J
Jiatian Cao Department of Cardiology, Zhongshan Hospital, Fudan University
J
Ji'e Yang Department of Cardiology, The First Affiliated Hospital of USTC, Division of Life Sciences and Medicine, University of Science and Technology of China
F
Feng Zhang Department of Cardiology, Zhongshan Hospital, Fudan University

Abstract

Myocardial ischemia-reperfusion (I/R) injury remains a critical clinical challenge, driven by unresolved inflammation and oxidative stress. This study investigated the cardioprotective effects of engeletin (ENG), a flavonoid glycoside, in mitigating myocardial I/R injury through modulation of zinc and redox homeostasis. In a murine I/R model, ENG administration significantly improved cardiac functon(enhanced LVEF and LVFS), reduced infarct size (TTC staining), attenuated apoptosis (BAX, cleaved Caspase3, and TUNEL), and suppressed adverse remodeling (Masson staining). Mechanistically, integrated transcriptomic and metabolomic profiling in bone marrow-derived macrophages (BMDMs) revealed that ENG suppressed oxidative stress pathways while enhancing glutathione metabolism. Limited proteolysis mass spectrometry (LiP-MS) identified VPS35, a retromer complex component, as ENG’s direct target. ENG competitively disrupted the VPS35-ZNT1 interaction, thereby maintaining ZNT1 membrane localization to promote zinc efflux and prevent cytosolic zinc overload—a key driver of NLRP3 inflammasome activation. Molecular dynamics simulations and mutagenesis (GLN566A mutation in VPS35) confirmed that ENG binding stabilized VPS35’s Armadillo domain, blocking ZNT1 internalization. These findings highlighted ENG's dual antioxidative and anti-inflammatory roles via the VPS35-SLC30A1 axis, positioning it as a novel therapeutic agent for I/R injury. The study bridged flavonoid pharmacology with macrophage immunometabolism, offering a translational strategy to improve post-infarct outcomes.

Citation Information

@article{junboge2026,
  title={Targeting VPS35-ZNT1 Interaction by Engeletin Prevents Zinc Overload and Alleviates Myocardial Ischemia-Reperfusion Injury via Surface ZNT1 Stabilization},
  author={Junbo Ge and Jian Zhang and Rong Huang and Jiayu Liang and Yang Gao and Shiyu Hu and Jingpu Wang and Yiwen Wang and Yanan Qu and Jinyi Lin and Jucheng Liu and Ke Meng and Jiatian Cao and Ji'e Yang and Feng Zhang},
  journal={Experimental & Molecular Medicine},
  year={2026},
  doi={https://doi.org/10.21203/rs.3.rs-9229364/v1}
}
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