Guoliang Huang, Lian Lu, Yuhong You, Jie Li, Kaixiang Zhang
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引用次数: 0
Abstract
Autophagy-dependent ferroptosis and glycolysis play a significant role in tumor development. α-Enolase (ENO1), a glycolytic enzyme, has been demonstrated to function as a crucial modulator in breast cancer (BC). However, the specific mechanism by which ENO1 influences the ferroptosis and glycolysis of BC remains unclear. qRT-PCR, along with western blot analysis was applied to investigate ENO1 and cystatin SN (CST1) expression in BC cells. Glycolysis level was measured by extracellular acidification rate (ECAR), lactate production, glucose consumption, and western blot analysis. Ferroptosis was evaluated by iron and lipid peroxidation assay, DCFH-DA staining, and western blot analysis. Immunofluorescence, together with western blot analysis was adopted for assessing cell autophagy and mTOR signaling pathway. Cell apoptosis and Ki67 level were measured by TUNEL and immunohistochemistry, respectively. ENO1 had abundant existence in BC cell lines. ENO1 silencing inhibited glycolysis but promoted ferroptosis and autophagy. In addition, autophagy inhibitor 3-MA reversed the impacts of ENO1 silencing on glycolysis and ferroptosis. Meanwhile, mTOR activator MHY1485 demonstrated opposing effects on autophagy. Moreover, CST1 could be extensively found in BC cell lines, and its overexpression reversed the effects of ENO1 silencing on glycolysis and ferroptosis. In vivo experiments illustrated that ENO1 deletion suppressed BC tumor growth, increased the apoptosis rate, restrained cell proliferation, and glycolysis, but promoted ferroptosis and autophagy, as well as reducing CST1 and mTOR signaling. To sum up, ENO1 silencing mediated a utophagy-dependent ferroptosis and glycolysis in BC cells by regulating CST1.
自噬依赖性铁蛋白沉积和糖酵解在肿瘤发生发展中起着重要作用。α-烯醇化酶(ENO1)是一种糖酵解酶,已被证实在乳腺癌(BC)中发挥着重要的调节作用。qRT-PCR和Western印迹分析被用来研究ENO1和胱抑素SN(CST1)在乳腺癌细胞中的表达。糖酵解水平通过细胞外酸化率(ECAR)、乳酸生成、葡萄糖消耗和 Western 印迹分析进行测量。通过铁和脂质过氧化测定、DCFH-DA 染色和 Western 印迹分析评估铁变态反应。免疫荧光和 Western 印迹分析用于评估细胞自噬和 mTOR 信号通路。细胞凋亡和Ki67水平分别通过TUNEL和免疫组化进行检测。ENO1在BC细胞系中大量存在。沉默ENO1可抑制糖酵解,但促进铁突变和自噬。此外,自噬抑制剂3-MA能逆转ENO1沉默对糖酵解和铁突变的影响。同时,mTOR 激活剂 MHY1485 对自噬的影响则相反。此外,CST1广泛存在于BC细胞系中,其过表达可逆转ENO1沉默对糖酵解和铁突变的影响。体内实验表明,ENO1缺失抑制了BC肿瘤的生长,增加了细胞凋亡率,抑制了细胞增殖和糖酵解,但促进了铁代谢和自噬,并减少了CST1和mTOR信号传导。综上所述,ENO1沉默通过调节CST1介导了依赖于吞噬细胞的铁代谢和糖酵解。
期刊介绍:
Drug Development Research focuses on research topics related to the discovery and development of new therapeutic entities. The journal publishes original research articles on medicinal chemistry, pharmacology, biotechnology and biopharmaceuticals, toxicology, and drug delivery, formulation, and pharmacokinetics. The journal welcomes manuscripts on new compounds and technologies in all areas focused on human therapeutics, as well as global management, health care policy, and regulatory issues involving the drug discovery and development process. In addition to full-length articles, Drug Development Research publishes Brief Reports on important and timely new research findings, as well as in-depth review articles. The journal also features periodic special thematic issues devoted to specific compound classes, new technologies, and broad aspects of drug discovery and development.