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pH/粘度可激活的NIR光探针通过接受器工程用于高对比度生物成像的黑米染料
Da Feng1, Li Guo1, Yihan Zhao1
1Key Laboratory of Synthetic and Natural Functional Molecule Chemistry of Ministry of Education, Key Lab of Modern Separation Science in Shaanxi Province, College of Chemistry and Materials Science, Northwest University, Xi'an, Shaanxi 710127, P. R. China.
Analytical chemistry
|February 15, 2025
概括
新的近红外光探测器可以实时监测 lysosomal 环境. 这些探针克服了选择性问题,使得急性胃炎等疾病的准确诊断成为可能.
科学领域:
- 生物化学 生物化学
- 细胞生物学 细胞生物学
- 医疗成像医学成像
背景情况:
- 对溶解体微环境的监测对于理解器官相互作用和疾病至关重要.
- 在复杂的细胞环境中,使用基于morpholine的染料的传统探针面临选择性问题和错误阳性.
- 半氨酸染料 (HD) 在肝脏等器官中经常表现出非特异性的光,这是由于不合适的pKa值.
研究的目的:
- 开发具有增强选择性和灵敏性的新型溶解体向近红外 (NIR) 光探针.
- 创建可通过pH值和粘度变化激活的探针,以改善细胞成像.
- 为了实时地在现场诊断与溶酶体功能障碍相关的疾病.
主要方法:
- 合成了新的NIR光探针,通过将纳夫他胺染料与半氨酸染料结合在一起.
- 在不同的pH值和粘度条件下研究探头的行为.
- 评估了用于细胞成像和现场疾病诊断的探针性能,重点是信号与背景比率 (SBR).
主要成果:
- 开发了可通过pH/粘度激活的针对溶酶体的NIR探针.
- 探测器在生理pH下显示最小的光,在酸性条件下显示微弱的光.
- 病态组织中的异常粘度引发了大量的光激活.
- NpCy-4探测器显示出用于细胞成像的优越SBR.
- 证明了急性胃炎的有效实时现场诊断.
结论:
- 新型纳夫他胺 - 氨酸探针为溶酶体微环境监测提供了更好的选择性和灵敏性.
- NpCy-4是先进的细胞成像和急性胃炎的现场诊断的一个有前途的工具.
- 这些探针解决了传统光染料的局限性,为更准确的疾病诊断铺平了道路.
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