基于烯的新型化学发光聚合物纳米粒子,用于高选择性地检测超氧化离子在体内
Qi Guo1, Yang Feng1, Hongjie Song2
1Analytical & Testing Center, Sichuan University, Chengdu, Sichuan 610064, China.
Analytical chemistry
|October 2, 2023
概括
一个新的基于烯的化学发光探针,SH-PDI聚合物,检测超氧化离子 (O2•−) 和其他反应性氧物种. 纳米粒子 (SPPS NPs) 为生物系统中的O2•−检测和成像提供了增强的灵敏度和选择性.
科学领域:
- 生物医学工程 生物医学工程
- 分析化学 分析化学
- 材料科学 材料科学 材料科学
背景情况:
- 超氧化 (O2•−) 是一种具有复杂生物作用的关键反应性氧物种.
- 在体内确定O2•−对于理解其生物功能至关重要.
- 现有的检测方法可能缺乏O2•−的特异性或灵敏性.
研究的目的:
- 开发一种新型的化学发光 (CL) 探针,用于敏感和选择性检测超氧化物离子 (O2•−).
- 创建一种水溶性纳米粒子系统,以提高CL探头的性能.
- 展示开发的探针在体外和体内O2•−的成像中的应用.
主要方法:
- 一个基于烯的化学发光探针 (SH-PDI聚合物) 的合成.
- 纳米沉使用烯终结聚 ((styrene-co-maleic anhydride) 来形成水溶性纳米颗粒 (SPPS NP).
- 在体外对CL特性,选择性和检测极限的评估.
- 在LPS诱导的急性炎症和药物诱导的急性损伤 (AKI) 鼠标模型中,用于成像O2•−的SPPSNP的应用.
主要成果:
- 该SH-PDI聚合物表现出化学发光,以响应O2•−.
- 与聚合物相比,SPPS NPs显示了较强的CL强度和对O2•−的选择性.
- 对于CL成像,CL发射波长 (580和710纳米) 是适合的.
- 在pH 7.0.0下,SPPS NPs在体外获得了8.2 × 10−8 M的O2•−检测极限.
- 在急性炎症和AKI的小鼠模型中成功对O2•−进行体内成像.
结论:
- SPPS NPs代表了一种有前途的化学发光探针,用于敏感和选择性检测O2•−.
- 开发的纳米粒子系统可在复杂的生物环境中进行O2•−成像.
- 这种方法有可能用于诊断和监测与氧化应激相关的疾病.
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