Targeted multimodal theranostics via biorecognition controlled aggregation of metallic nanoparticle composites.

Targeted multimodal theranostics via biorecognition controlled aggregation of metallic nanoparticle composites.
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通过生物识别控制金属纳米粒子复合材料聚集的靶向多模式治疗诊断

DOI:
10.1039/c6sc01463a
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发表时间:
2016-07-01
期刊:
影响因子:
8.4
通讯作者:
Tian H
Tian H
中科院分区:
化学1区
文献类型:
--
作者:
Hu XL;Zang Y;Li J;Chen GR;James TD;He XP;Tian H

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我们表明,两种不同的机制,FRET和MEF,金属纳米粒子可以通过配体-受体相互作用进行微调,产生具有增强的ROS产生的纳米复合材料,用于靶向成像和多模式治疗。我们开发了一种金属纳米颗粒的治疗诊断纳米复合材料,该纳米复合材料使用两种不同的荧光机制:Förster共振能量转移(FRET)和由配体-受体相互作用控制的金属增强荧光(MEF)。荧光团标记的糖配体的环糊精封端的金纳米颗粒的超分子组装产生了纳米复合材料,由于FRET从荧光团到近端颗粒的淬灭荧光。随后,与选择性蛋白质受体的相互作用导致复合物的聚集,通过MEF将荧光从远端金属颗粒重新激活为封装在聚集体中的荧光团。聚集还导致复合物的吸光度红移,从而增强红光照射下活性氧物质(ROS)的产生。我们的纳米复合材料已被证明适用于靶向癌细胞成像以及使用复合材料的光动力学和药物递送特性的多模式治疗。
We show that two distinct mechanisms, FRET and MEF, of metallic nanoparticles can be finely tuned by a ligand–receptor interaction, producing a nanocomposite with an enhanced ROS production for targeted imaging and multimodal therapy. We have developed a theranostic nanocomposite of metallic nanoparticles that uses two distinct fluorescence mechanisms: Förster Resonance Energy Transfer (FRET) and Metal-Enhanced Fluorescence (MEF) controlled by ligand–receptor interaction. Supramolecular assembly of the fluorophore-labeled glycoligands to cyclodextrin-capped gold nanoparticles produces a nanocomposite with a quenched fluorescence due to FRET from the fluorophore to the proximal particle. Subsequently, interaction with a selective protein receptor leads to an aggregation of the composite, reactivating the fluorescence by MEF from the distal metallic particles to fluorophores encapsulated in the aggregates. The aggregation also causes a red-shift in absorbance of the composite, thereby enhancing the production of reactive oxygen species (ROS) on red-light irradiation. Our nanocomposite has proven suitable for targeted cancer cell imaging as well as multimode therapy using both the photodynamic and drug delivery properties of the composite.
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