水疱性口炎病毒基质蛋白靶向线粒体,重编程葡萄糖代谢,并使脑胶质瘤对 2-脱氧葡萄糖敏感。

Matrix Protein of Vesicular Stomatitis Virus Targets the Mitochondria, Reprograms Glucose Metabolism, and Sensitizes to 2-Deoxyglucose in Glioblastoma.

机构信息

Department of Abdominal Oncology, Sichuan Clinical Research Center for Cancer, Sichuan Cancer Hospital & Institute, Sichuan Cancer Center, Affiliated Cancer Hospital of University of Electronic Science and Technology of China, Chengdu, China.

Department of Oncology, LuXian People's Hospital, Luzhou, China.

出版信息

Hum Gene Ther. 2024 Oct;35(19-20):838-854. doi: 10.1089/hum.2024.002. Epub 2024 Aug 2.

Abstract

A potential therapeutic approach for cancer treatment is target oxidative phosphorylation and glycolysis simultaneously. The matrix protein of vesicular stomatitis virus (VSV MP) can target the surface of mitochondria, causing morphological changes that may be associated with mitochondrial dysfunction and oxidative phosphorylation inhibition. Previous research has shown that mitochondrial abnormalities can direct glucose metabolism toward glycolysis. Thus, after treatment with VSV MP, glycolysis inhibition is necessary to completely block glucose metabolism and eradicate cancer. Here, to inhibit glycolysis, the 2-deoxy-D-glucose (2-DG), a synthetic glucose analog was used to combine with VSV MP to treat cancer. This study aims to determine how VSV MP affects the glucose bioenergetic metabolism of cancer cells and to evaluate the synergistic effect of 2-DG when combined with VSV. Our results indicated that in U87 and C6 glioblastoma cell lines, VSV MP caused mitochondrial membrane potential loss, cytochrome c release, and glucose bioenergetics metabolism reprogramming. When combined with 2-DG, VSV MP synergistically aggravated cell viability, apoptosis, and G2/M phase arrest. Meanwhile, the combination therapy exacerbated ATP depletion, activated AMPK, and inhibited mammalian target of rapamycin signaling pathways. In addition, 2-DG treatment alone induced autophagy in glioblastoma cells; however, VSV MP inhibited the autophagy induced by 2-DG in combined treatment and finally contributed to the enhanced cytotoxic effect of the combination strategy in U87 and C6 cancer cells. In the orthotopic U87 glioblastoma model and subcutaneous C6 glioblastoma model, the combined treatment led to significant tumor regression and prolonged survival. A potent therapeutic approach for treating glioblastoma may be found in the combination of VSV MP and glycolytic inhibitors.

摘要

一种潜在的癌症治疗方法是同时靶向氧化磷酸化和糖酵解。水疱性口炎病毒(VSV)基质蛋白(VSV MP)可以靶向线粒体表面,引起形态变化,可能与线粒体功能障碍和氧化磷酸化抑制有关。先前的研究表明,线粒体异常可以使葡萄糖代谢转向糖酵解。因此,在用 VSV MP 治疗后,需要抑制糖酵解以完全阻断葡萄糖代谢并根除癌症。在这里,为了抑制糖酵解,使用 2-脱氧-D-葡萄糖(2-DG),一种合成的葡萄糖类似物,与 VSV MP 结合来治疗癌症。本研究旨在确定 VSV MP 如何影响癌细胞的葡萄糖生物能量代谢,并评估 2-DG 与 VSV 联合使用的协同作用。我们的结果表明,在 U87 和 C6 神经胶质瘤细胞系中,VSV MP 导致线粒体膜电位丧失、细胞色素 c 释放和葡萄糖生物能量代谢重编程。与 2-DG 联合使用时,VSV MP 协同加重细胞活力、凋亡和 G2/M 期阻滞。同时,联合治疗加剧了 ATP 耗竭,激活了 AMPK,并抑制了哺乳动物雷帕霉素靶蛋白信号通路。此外,2-DG 单独处理诱导神经胶质瘤细胞自噬;然而,VSV MP 抑制了联合治疗中 2-DG 诱导的自噬,最终有助于增强联合治疗策略在 U87 和 C6 癌细胞中的细胞毒性作用。在原位 U87 神经胶质瘤模型和皮下 C6 神经胶质瘤模型中,联合治疗导致肿瘤明显消退和生存期延长。VSV MP 与糖酵解抑制剂的联合治疗可能为治疗神经胶质瘤提供一种有效的治疗方法。

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