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Giorgia Chinigò¹, Carlotta Pontremoli², Francesca Bianco³

¹University of Torino, Department of Life Sciences and Systems Biology, Via Accademia Albertina 13, 10123 Turin, Italy.

Biochimica et biophysica acta. Molecular cell research

|September 1, 2025

概括

新的正方体光敏感剂增强光动力疗法 (PDT) 的疗效. 通过调节和ROS信号通路,提高癌症治疗潜力.

科学领域:

生物化学
摄影化学
细胞生物学

背景情况:

光动力疗法 (PDT) 是FDA批准的癌症治疗方法.
开发新型光敏感剂对于提高PDT效率和尽量减少副作用至关重要.
了解PS光激活信号通路可以优化治疗结果.

研究的目的:

合成和评估用于PDT的修饰印氨酸环的二氨酸 (SQ) 衍生物.
调查这些SQs关于光毒性和细胞内信号的结构-活性关系.
阐明 (Ca2+) 和活性氧物种 (ROS) 在SQ中介光毒性中的作用.

主要方法:

一系列SQ衍生物的合成,具有不同的印度林环修饰.
通过体外测定对光毒性活动的评估.
测量光诱导的细胞质Ca2+信号和ROS生成.
在细胞区 (内质网膜和线粒体) 内的SQ定位研究.

主要成果:

不被替代的SQ显示光毒性,由 (Br-SQ-C4) 或硫 (SQ-S-C4) 修饰增强.
光毒性与Ca2+信号和ROS生成具有正相关性.
Br-SQ-C4局部化到ER,诱导Ca2+释放和随后的ROS生成.
SQ-S-C4局部化到线粒体,导致基础Ca2+/ROS动态的扰动.

结论:

SQ衍生品对PDT具有有前途的光毒性.
细胞内Ca2+和ROS信号通路的取代剂依赖调节导致光毒性.
这些发现为SQ介导的信号提供了洞察力,指导了更有效的PDT药物的开发.

关键词:

2+) 信号光动力疗法光毒性其他信号传输红

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