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Rational Design, Synthesis of Fluorescence Probes for Quantitative Detection of Amyloid-β in Alzheimer’s Disease Based on Rhodamine-Metal Complex
Analytical Chemistry ( IF 6.7 ) Pub Date : 2022-08-17 , DOI: 10.1021/acs.analchem.2c01911
Jingjing Xiang 1 , Chunbai Xiang 1 , Lihua Zhou 2 , Mengsi Sun 3 , Lixiong Feng 2 , Chuangjun Liu 4 , Lintao Cai 1 , Ping Gong 1
Affiliation  

The efficient detection and monitoring of amyloid-β plaques (Aβ42) can greatly promote the diagnosis and therapy of Alzheimer’s disease (AD). Fluorescence imaging is a promising method for this, but the accurate determination of Aβ42 still remains a challenge. The development of a reliable fluorescent probe to detect Aβ42 is essential. Herein, we report a rational design strategy for Aβ42 fluorescence probes based on rhodamine-copper complexes, Rho1-Cu–Rho4-Cu, among them Rho4-Cu exhibits the best performance including high sensitivity (detection limit = 24 nM), high affinity (Kd = 23.4 nM), and high selectivity; hence, Rho4-Cu is selected for imaging Aβ42 in AD mice, and the results showed that this probe can differentiate normal mice and AD mice effectively.

中文翻译:

基于罗丹明金属络合物的阿尔茨海默病中β-淀粉样蛋白定量检测荧光探针的合理设计、合成

β-淀粉样蛋白斑块(Aβ42)的高效检测和监测可以极大地促进阿尔茨海默病(AD)的诊断和治疗。荧光成像是一种很有前途的方法,但准确测定 Aβ42 仍然是一个挑战。开发可靠的荧光探针来检测 Aβ42 至关重要。在此,我们报告了基于罗丹明-铜络合物 Rho1-Cu-Rho4-Cu 的 Aβ42 荧光探针的合理设计策略,其中 Rho4-Cu 表现出最佳性能,包括高灵敏度(检测限 = 24 nM)、高亲和力(K d = 23.4 nM),选择性高;因此,选择Rho4-Cu对AD小鼠的Aβ42进行成像,结果表明该探针可以有效区分正常小鼠和AD小鼠。
更新日期:2022-08-17
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