一个双锁ESIPT-AIE光探测器检测了具有高度匹配响应动力学的雌激酶
Zhuo Ye1, Yiting Yang1, Yuqi Wang1
1Key Laboratory of Green Chemical Media and Reactions, Ministry of Education; Henan International Joint Laboratory of Smart Molecules and Identification and Diagnostic Functions; School of Chemistry and Chemical Engineering, Henan Normal University, Xinxiang, Henan 453007, P.R. China.
Analytical chemistry
|February 25, 2025
概括
一种新型的双锁光探针 (ESIPT-AIE) 通过匹配酶动力学来准确检测酶活性,从而提高疾病研究的成像准确性.
科学领域:
- 生物化学 生物化学
- 分子生物学分子生物学
- 化学生物学 化学生物学
背景情况:
- 水溶酶在生物过程中至关重要;它们的功能障碍与人类疾病有关.
- 在现场光检测提供了酶活性的时空分析,但在成像准确性方面存在局限性.
- 目前的方法往往只捕捉特定的酶探针相互作用阶段,从而导致低于最佳的结果.
研究的目的:
- 开发一种先进的可激活光探针,用于准确检测酶活性.
- 通过考虑整个酶反应动力学来解决当前方法的局限性.
- 为了创建具有增强特异性和减少背景噪声的探测器,以获得可靠的成像.
主要方法:
- 开发一个双锁激发状态内分子质子转移-聚合诱导发射 (ESIPT-AIE) 光探测器 (Br-3N-2Et).
- 通过增强的反应前识别和减少基底光,验证探头的机制.
- 评估探针的亲和力,结合动力学和斯托克斯转移通过与酶催化位点的相互作用.
- 用于快速信号增强和现场成像的双发射机制的演示.
主要成果:
- Br-3N-2Et探头表现出基底光减少 (Φ = 0.0183) 和增加对干扰的抗性.
- 观察到对酶催化位点的增强亲和力和显著的斯托克斯转移 (188 nm).
- 通过ESIPT-AIE机制实现了132.2倍的现场光信号增强.
- 在HepG2细胞和子宫内膜癌组织中实现了酶活性区域差异检测.
结论:
- 开发的双锁ESIPT-AIE探头通过涵盖整个酶反应,准确监测酶活性.
- 与现有方法相比,这种探测器提供了更好的成像准确性和可靠性.
- 这些发现为在复杂的生物系统中用于酶传感的集成多机制平台铺平了道路.
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