一种对酸还原酶有反应性的光激活光敏感剂,用于溶酶体成像和光动力疗法
Jinhui Wang1, Ruxin Li1, Han Ouyang1
1Institute of Drug Discovery Technology, Ningbo University, Ningbo, 315211, China.
Talanta
|May 18, 2024
概括
一种新型的探测器M-TPE-P,可以有效地检测 lysosomes 中的缺氧生物标志物缩酶 (NTR). 它显示了通过反应性氧物种生成作为癌症治疗的光敏剂的潜力.
科学领域:
- 生物医学工程 生物医学工程
- 化学生物学 化学生物学
- 分子成像学分子成像学
背景情况:
- 酸还原酶 (NTR) 是瘤缺氧的一个关键生物标志物.
- 溶解体功能障碍与各种疾病有关.
- 为疾病评估开发有针对性的探针至关重要.
研究的目的:
- 设计和合成一个由NTR触发的溶酶体准探头 (M-TPE-P).
- 评估M-TPE-P作为癌症治疗的潜在光敏剂.
- 评估探针在检测NTR及其溶酶体向特异性的有效性.
主要方法:
- 基于四乙烯的探头M-TPE-P合成.
- 密度函数理论 (DFT) 对光物理性质的计算.
- 进行对接研究,以评估M-TPE-P对NTR的亲和力.
- 在体外测定选择性,灵敏度和检测极限.
- 细胞成像和局部化研究用于溶酶体向.
- 评估反应性氧物种 (ROS) 生产和光动力疗法 (PDT) 效应.
主要成果:
- M-TPE-P表现出一个狭窄的单元-三元能量差距,表明有效的光敏化.
- 在广泛的pH范围 (kcat/Km = 2.18 × 10^4 M^-1 s^-1) 中对NTR检测具有很高的选择性和灵敏性.
- 在80%的PBS/DMSO中,低检测极限为53.6 ng/mL.
- 成功的细胞内NTR跟踪与绿色光和优秀的溶酶体向特异性.
- 有效的ROS生成和显著的PDT对NIR照射的影响.
结论:
- M-TPE-P是一种高度选择性和敏感的探针用于NTR检测,具有特定的溶酶体向.
- 探测器的光物理特性和产生ROS的能力将其定位为癌症光动力学治疗的有希望的候选者.
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