一个硫原子增强的策略,用于可溶和不可溶的粉样β物种的NIR成像
Xiaolei Zhao1, Zhirong Zhu2, Yiwei Wang3
1School of Chemical Engineering and Materials, Changzhou Institute of Technology, Changzhou, 213032, China; State Key Laboratory of Coordination Chemistry, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing, 210093, China.
Talanta
|January 20, 2026
概括
研究人员开发了一种新的光探针 (F-BSTH-NM),该探针准可溶性粉样蛋白-β (Aβ) 寡合体,这是早期阿尔茨海默病 (AD) 的关键驱动因素. 这种探测器可以为潜在的早期阿尔茨海默病诊断提供增强的成像.
科学领域:
- 神经科学是一个神经科学.
- 化学 化学 化学
- 医疗成像医学成像
背景情况:
- 可溶性粉样β (Aβ) 寡合体是早期阿尔茨海默病 (AD) 神经毒性的关键驱动因素.
- 针对可溶性Aβ寡合体的有效成像探针的开发是有限的,阻碍了早期AD诊断.
- 需要新的分子设计原则来增强探针结合亲和力和Aβ物种的特异性.
研究的目的:
- 设计一种光强度放大探针,用于选择性成像可溶性Aβ寡合体.
- 研究一种硫原子杂交策略,以增强探针与Aβ物种的结合.
- 评估探针在体内对区分阿尔茨海默病模型的有效性.
主要方法:
- 设计了一个D-π-A探头 (F-BSTH-NM) 结合了硫原子混合和一个非平面色谱.
- 为近红外 (NIR) 辐射优化π桥和电子捐赠组,并改进了可准性.
- 在AD小鼠模型中使用光启动比率,脂性,血脑屏障 (BBB) 透和体内/体外成像来评估探针性能.
主要成果:
- 工程设计的F-BSTH-NM探测器具有91倍的光放大和与Aβ物种结合时的NIR发射,特别是寡合物.
- 探测器表现出有利的脂友性 (cLogP = 2.61) 和有效的BBB透.
- 在体内NIR成像成功地将转基因AD小鼠与对照小鼠区分开来;ex vivo分析显示与斑块和寡合体共定位.
结论:
- 硫原子混合化是一种有效的策略,可以增强探针与可溶性Aβ寡合体的结合.
- 理性设计的F-BSTH-NM探头显示出作为早期阿尔茨海默病诊断的成像工具的潜力.
- 探测器能够检测斑块核和富含寡合体的外围,这有助于病理解剖.
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