氨基酸剥夺通过NRF2下调来诱导TXNIP的表达
Se Hee Ahn1,2, Se-Kyeong Jang1, Yu Jin Kim1,2
1Division of Fusion Radiology Research, Korea Institute of Radiological & Medical Sciences, Seoul, Republic of Korea.
IUBMB life
|December 6, 2023
概括
氨基酸的限制,特别是阿尔金因,谷氨酸,氨酸和氨酸的限制,增加了肺癌细胞中硫素相互作用蛋白 (TXNIP) 的表达. 这种增加与氧化应激和NRF2下调有关,这表明了新的癌症治疗点.
科学领域:
- 生物化学 生物化学
- 分子生物学分子生物学
- 在瘤学瘤学.
背景情况:
- 铁素相互作用蛋白 (TXNIP) 涉及各种疾病,包括癌症和糖尿病,对氧化应激很敏感.
- TXNIP是一个潜在的治疗标,但在氨基酸受限条件下其调节仍然不清楚.
研究的目的:
- 在非小细胞肺癌 (NSCLC) 细胞中,在氨基酸 (AA) 限制条件下研究TXNIP表达的调节.
- 探索氧化应激和关键转录因子在AA缺乏引起的TXNIP表达中的作用.
主要方法:
- 在各种AA剥夺条件下培养NSCLC细胞.
- 评估了TXNIP表达水平.
- 研究了核因子红色素2相关因子2 (NRF2) 和激活转录因子4 (ATF4) 的参与.
- 利用N-乙-l-氨酸 (NAC) 来评估活性氧物种 (ROS) 的作用.
主要成果:
- 缺少AA,特别是氨酸,谷氨酸,氨酸和氨酸,在NSCLC细胞中显著促进了TXNIP表达.
- 增加的TXNIP表达与NRF2下调相关,但不是ATF4激活.
- 在缺乏AA的细胞中,NAC治疗抑制了TXNIP的表达,这表明ROS的中介作用.
结论:
- 缺少AA诱导NSCLC细胞中的TXNIP表达,由ROS生产和NRF2下调调节介导.
- 调节TXNIP与AA新陈代谢的氧化还原稳态有关.
- 限制AA为癌症治疗提供了一个潜在的治疗策略.
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