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• W4387504243 abstract "Hepatoma-derived growth factor (HDGF) overexpression and uncontrolled ROS accumulation are involved in malignant transformation and poor prognosis in various types of cancer. However, the interplay between HDGF and ROS generation has not been elucidated in hepatocellular carcinoma. Here, we first analyzed the profile of HDGF expression and ROS production in newly generated orthotopic hepatomas by ultrasound-guided implantation. In situ superoxide detection showed that HDGF-overexpressing hepatomas had significantly elevated ROS levels compared with adjacent nontumor tissues. Consistently, liver tissues from HDGF-deficient mice exhibited lower ROS fluorescence than those from age- and sex-matched wild-type mice. ROS-detecting fluorescent dyes and flow cytometry revealed that recombinant HDGF stimulated the production of superoxide anion, hydrogen peroxide, and mitochondrial ROS generation in cultured hepatoma cells in a dose-dependent manner. In contrast, the inactive Ser103Ala rHDGF mutant failed to promote ROS generation or oncogenic behaviors. Seahorse metabolic flux assays revealed that rHDGF dose-dependently upregulated bioenergetics through enhanced basal and total oxygen consumption rate (OCR), extracellular acidification rate (ECAR), and oxidative phosphorylation in hepatoma cells. Moreover, antioxidants of NAC and MitoQ treatment significantly inhibited HDGF-mediated cell proliferation and invasive capacity. Genetic silencing of SOD2 augmented the HDGF-induced ROS generation and oncogenic behaviors of hepatoma cells. Finally, genetic knockdown nucleolin (NCL) and antibody neutralization of surface NCL, the HDGF receptor, abolished the HDGF-induced increase in ROS and mitochondrial energetics. In conclusion, this study has demonstrated for the first time that the HDGF/NCL signaling axis induces ROS generation by elevating ROS generation in mitochondria, thereby stimulating liver carcinogenesis." @default.
• W4387504243 created "2023-10-11" @default.
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• W4387504243 date "2023-10-01" @default.
• W4387504243 modified "2023-10-14" @default.
• W4387504243 title "HDGF Stimulates Liver Tumorigenesis by Enhancing Reactive Oxygen Species Generation in Mitochondria" @default.
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• W4387504243 doi "https://doi.org/10.1016/j.jbc.2023.105335" @default.
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