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系统Xc-在口腔状细胞癌的葡萄糖枯竭下加剧了代谢压力
Miao Wang1,2, Bo Li1, Wanrong Meng1,2
1State Key Laboratory of Oral Diseases & National Clinical Research Center for Oral Diseases, West China Hospital of Stomatology, Sichuan University, Chengdu, Sichuan, China.
Oral diseases
|October 19, 2023
概括
葡萄糖耗尽会通过Xc系统 (一种谷氨酸/氨酸反载体) 触发口腔状细胞癌 (OSCC) 中的细胞死亡. 这一发现支持葡萄糖饥饿疗法作为OSCC的治疗策略.
科学领域:
- 细胞的新陈代谢
- 癌症生物学 癌症生物学
- 生物化学 生物化学
背景情况:
- 新出现的证据将葡萄糖枯竭 (GD) 诱导的细胞死亡与Xc系统 - - 一种谷氨酸/氨酸反载体联系起来.
- 在GD诱导的细胞死亡中,系统Xc-的确切机制仍在争论中.
- 系统Xc-是广泛研究在ferroptosis的背景下.
研究的目的:
- 确认系统Xc-和口腔状细胞癌 (OSCC) 中GD诱导的细胞死亡之间的相关性.
- 阐明GD诱导的细胞死亡中Xc系统的潜在分子机制.
- 探索OSCC中准系统Xc-的治疗潜力.
主要方法:
- 定量PCR (qPCR) 和西式斑点检测用于评估xCT和CD98表达.
- 细胞活力测试用于测量在葡萄糖戒断下OSCC存活率.
- 路西法酶报告员和ChIP测试以确定调节SLC7A11.11的转录因子.
- 代谢学分析代谢变化.
- 海马测定线粒体功能和ATP生产.
- NADP+/NADPH套件用于测量氧化还原动力学.
主要成果:
- 系统Xc-通过增加谷氨酸消耗来促进OSCC中GD诱导的细胞死亡,导致NADPH耗尽和三碳酸 (TCA) 循环阻塞.
- 葡萄糖耗尽引起的xCT上调受p-eIF2α/ATF4信号轴的调节.
- 过度表达Xc系统- 损害OSCC细胞在葡萄糖贫乏条件下的代谢灵活性.
结论:
- 系统Xc-在OSCC中,在葡萄糖耗尽期间,在调解细胞死亡方面发挥着关键作用.
- 准系统Xc-或利用葡萄糖剥夺是OSCC的可行的治疗策略.
- 葡萄糖饥饿疗法通过损害其代谢适应性来消除OSCC细胞的有效性.
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