基于G-quadruplex的人工跨膜通道通过扰乱离子恒温来诱导癌细胞亡
Shuangna Liu1, Wanyu Xu1, Jing Zheng1
1College of Biology, College of Chemistry and Chemical Engineering, State Key Laboratory of Chemo/Biosensing and Chemometrics, Hunan University, Changsha, 410082, P. R. China.
研究人员开发了胆固醇标记的G-四重复频道,通过控制离子 (K+) 运输来诱导癌细胞死亡. 这种新的方法显示了未来抗癌疗法的前景,通过选择性向癌细胞.
科学领域:
- 生物物理化学 生物物理化学
- 纳米技术 纳米技术
- 分子瘤学分子瘤学
背景情况:
- 跨膜离子运输对细胞功能至关重要,并与癌症有关.
- 向离子稳态提供了癌症治疗的潜在策略.
- G-四重复结构显示出开发新型分子工具的前景.
研究的目的:
- 设计基于G-quadruplex的特异性跨膜通道.
- 为了研究这些通道在通过K+流动诱导癌细胞亡中的潜力.
- 评估开发的道的体内抗癌疗效和毒性.
主要方法:
- 设计和合成通过胆固醇标签固定在膜上的脂友性G-四重复合物 (Ch2-Para3).
- 光传输测定以确定离子传输活性和选择性 (K+/Na+).
- 在体外和体内研究评估癌细胞亡,线粒体膜潜力,细胞染色体c释放,活性氧物种 (ROS) 生产,酶激活和抗瘤作用.
主要成果:
- Ch2-Para3 G四重复体表现出高的K+运输活性 (EC50 = 10.9 × 10-6 m) 和选择性 (K+/Na+比为84).
- 通过K+流出,Ch2-Para3诱导癌细胞亡,由线粒体功能和亡标记物的变化证实.
- 脂性G-四重复体在体内显示出显著的抗瘤活性,没有可观察到的全身毒性.
结论:
- 脂性G-四重复体可以作为选择性的人工跨膜通道发挥作用.
- 通过这些通道介导的K+流量有效地诱导癌细胞亡.
- 这种基于DNA的道策略为开发新型抗癌疗法提供了有前途的途径.
更多相关视频
13:20Detection of Mitochondria Membrane Potential to Study CLIC4 Knockdown-induced HN4 Cell Apoptosis In Vitro
Published on: July 17, 2018
19:44Enhancement of Apoptotic and Autophagic Induction by a Novel Synthetic C-1 Analogue of 7-deoxypancratistatin in Human Breast Adenocarcinoma and Neuroblastoma Cells with Tamoxifen
Published on: May 30, 2012
相关概念视频
The Intrinsic Apoptotic Pathway
Non-gated Ion Channels
Compared to the gated ion channels, the non-gated channels, also known as leakage or passive channels, have no gating mechanism....
Mechanically-gated Ion Channels
Electron Transport Chain: Complex I and II
ROS generation is regulated and maintained at moderate levels necessary...
Voltage-gated Ion Channels
Generally, all voltage-gated ion channels have a 'voltage-sensing domain' that spans the lipid bilayer. The charged residues in the sensor move in response to the membrane potential changes that open the channel allowing ions movement. There are several...
Aquaporins
