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通过肝细胞癌细胞的DNA- PKcs/ ATM/ ATR通路干预与5- 甲的协同作用

Han Wang1, Huaxia Xie1, Yuan Lin1

  • 1College of Basic Medicine and Forensic Medicine, Henan University of Science and Technology, Luoyang 471023, China.

Acta biochimica et biophysica Sinica
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概括

通过增加活性氧物种 (ROS) 和调节DNA修复通路,L-Arg和5-FU的组合会诱导肝癌细胞的DNA损伤和亡. 这种协同效应导致细胞循环停止和细胞死亡,提供了潜在的治疗策略.

关键词:
5 - 甲修复DNA损伤亚氨酸可诱导的氧化合成酶氧化

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科学领域:

  • 分子生物学
  • 癌症研究
  • 生物化学

背景情况:

  • 修复DNA损伤对于细胞完整性至关重要.
  • 肝细胞癌 (HCC) 仍然是一个重大的健康挑战.
  • 了解DNA修复和化疗之间的相互作用至关重要.

研究的目的:

  • 研究L-阿尔金因 (L-Arg) 和5-甲 (5-FU) 对肝细胞癌 (HCC) 细胞的协同作用.
  • 阐明涉及DNA损伤,氧化应激和修复途径的潜在分子机制.
  • 在相关的临床前癌症模型中验证发现.

主要方法:

  • 对HCC细胞进行L-Arg和5-FU的联合治疗.
  • 细胞增殖的评估,细胞灭亡标志物 (Bax/Bcl-2,卡斯帕斯,PARP裂变,p53酸化).
  • 对DNA损伤标记 (γ-H2AX),细胞周期进展 (G2/M停止) 和信号通路 (iNOS,NO,ROS,DNA-PKcs,ATM,ATR,PI3K/AKT) 的分析.

主要成果:

  • L-Arg和5-FU组合显著抑制细胞增殖和诱导细胞亡.
  • 这由增加的氧化 (NO) 生产,反应性氧物种 (ROS) 积累和随后的DNA损伤 (γ- H2AX) 促成.
  • 该疗法通过降低DNA- PKcs和PI3K/ AKT的调节DNA修复途径,同时增强ATM/ ATR信号传递,导致G2/ M的停止和亡.

结论:

  • L-Arg和5-FU协同诱导氧化应激和DNA损伤,引发HCC细胞的亡.
  • 双重调节DNA修复通路 (PI3K/AKT/DNA-PKcs抑制和ATM/ATR激活) 是一个关键机制.
  • 这些实验室和大鼠肝癌模型的研究结果表明HCC是一种有前途的治疗策略.