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Downregulation of MCF2L Promoted the Ferroptosis of Hepatocellular Carcinoma Cells through PI3K/mTOR Pathway in a RhoA/Rac1 Dependent Manner

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机构: [1]Guangzhou Med Univ, Dept Clin Lab, Affiliated Hosp 2, Guangzhou, Guangdong, Peoples R China [2]Guangzhou Med Univ, Dept Hlth Examinat, Affiliated Hosp 2, Guangzhou, Guangdong, Peoples R China [3]Southern Med Univ, Dept Business Developement, Zhujiang Hosp, Guangzhou, Guangdong, Peoples R China [4]Guangzhou Univ Chinese Med, Dept Neurol, Affiliated Hosp 2, Guangzhou, Guangdong, Peoples R China [5]Childrens Hosp, Capital Inst Pediat, Dept Intervent Radiol & Vasc Anomalies, Beijing, Peoples R China
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Backgound. Multiple patients with hepatocellular carcinoma (HCC) received sorafenib therapy presented primary or secondary chemoresistance. The underlying mechanisms of chemoresistance are rather vague, ferroptosis is a new kind of cell death, and its discovery provides new opportunities to overcome sorafenib resistance. Therefore, it is essential to investigate the regulators of ferroptosis and implement a corresponding therapy strategy. Methods and Results. The levels of MCF2L were detected by PCR and western blotting assay. The effect of MCF2L on ferroptosis was confirmed by MTT, colony formation assay, Brdu, in vivo animal experiment, and the content of Iron, GSH, ROS, and MDA. The underlying mechanisms were explored by PCR, western blotting, and affinity precipitation assay. Our findings demonstrated that MCF2L is remarkedly upregulated in HCC tissues, and sorafenib can induce the levels of MCF2L, suggesting that MCF2L might function in sorafenib resistance of HCC. Further analysis showed that downregulation of MCF2L enhances HCC cell death induced by sorafenib, and ferroptosis inhibitor can reverse this process. Subsequent experiments showed that downregulation of MCF2L elevates the content of Iron, ROS, and MDA, which are all indicators of ferroptosis. Finally, mechanism analysis showed that MCF2L regulates the PI3K/AKT pathway in a RhoA/Rac1 dependent manner. Conclusions. Our study showed that targeting MCF2L may be a hopeful method to overcome sorafenib-resistance through inducing ferroptosis in HCC.

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大类 | 4 区 医学
小类 | 4 区 生物工程与应用微生物 4 区 遗传学 4 区 医学:研究与实验 4 区 病理学
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Q2 BIOTECHNOLOGY & APPLIED MICROBIOLOGY Q2 PATHOLOGY Q2 GENETICS & HEREDITY Q3 MEDICINE, RESEARCH & EXPERIMENTAL
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第一作者机构: [1]Guangzhou Med Univ, Dept Clin Lab, Affiliated Hosp 2, Guangzhou, Guangdong, Peoples R China
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