硫化纳米集群触发DNA损伤,并诱导非小细胞肺腺癌细胞的细胞周期停止
María M Figueroa Rosado1, Kevin Muñoz Forti1, Patricia Rodríguez-Rodríguez1
1Department of Biology, University of Puerto Rico, Ponce 00732, Puerto Rico.
International journal of molecular sciences
|February 26, 2025
概括
硫化 (CaS) 纳米集群通过增加氧化应激和DNA损伤,在非小细胞肺癌 (NSCLC) 中选择性诱导细胞死亡. 这种有针对性的方法节省了健康的肺细胞,为肺癌治疗提供了一个有希望的新途径.
科学领域:
- 生物医学工程 生物医学工程
- 纳米技术纳米技术
- 在瘤学瘤学.
背景情况:
- 肺癌是全球癌症相关死亡的主要原因.
- 硫化 (CaS) 纳米结构在临床前癌症模型中显示出治疗潜力.
- 针对肺癌细胞的CaS纳米集群的选择性机制尚未完全理解.
研究的目的:
- 阐明CaS纳米集团在非小细胞肺癌 (NSCLC) 细胞中诱导细胞毒性的分子机制.
- 为了比较CaS纳米团对NSCLC细胞和健康肺纤维细胞的影响.
- 研究CaS纳米团在DNA损伤,细胞循环,氧化应激和修复途径中的作用.
主要方法:
- 研究了DNA损伤,细胞周期进展,氧化应激标志物和细胞修复机制.
- 利用NSCLC细胞和健康的肺纤维细胞进行比较分析.
- 在酸性微环境中分析了CaS纳米集团的pH依赖效应.
主要成果:
- 在酸性瘤微环境中,CaS纳米集群分解为Ca2+和H2S,增加细胞内.
- 升高的水平会引发氧化应激,并抑制NSCLC细胞中的DNA修复.
- 在没有影响健康细胞的情况下,CaS纳米团可选择性地在G0-G1和S阶段捕获NSCLC细胞.
- 选择性细胞毒性是由Ca2+和ROS增加的介导,导致DNA双链断裂.
结论:
- CaS纳米集群对NSCLC细胞表现出pH依赖的选择性细胞毒性.
- 这些纳米集群破坏了基因组的稳定性,并诱导细胞循环停止,可能导致细胞死亡.
- 酸纳米集群代表了肺癌的新治疗策略,最大限度地减少对健康组织的损害.
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