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首页> 外文期刊>Biomaterials Science >NIR-emitting semiconducting polymer nanoparticles for in vivo two-photon vascular imaging
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NIR-emitting semiconducting polymer nanoparticles for in vivo two-photon vascular imaging

机译:用于体内二光子血管成像的NIR-发射半导体聚合物纳米颗粒

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摘要

Two-photon fluorescence (TPF) imaging holds great promise for real-time monitoring of cerebral ischemia-reperfusion injury, which is important for the clinical diagnosis of stroke. However, biocompatible and photostable NIR-emitting probes for TPF imaging of ischemic stroke are lacking. Herein, we report the first NIR-emitting TPF probe (named NESPN) prepared using semiconducting polymers for TPF imaging of cerebral ischemia. By virtue of its excellent biocompatibility with the nervous system and bright fluorescence NIR emission, NESPN enables the real-time imaging of mouse brain vasculature with micrometer-scale spatial resolution, realizing clear visualization of ultrafine capillaries (similar to 3.16 mu m). Moreover, NESPN can be utilized in the dynamic monitoring of cerebral blood flow velocity. Microangiography using NESPN was successfully used to indicate the openness of the penumbra area in the mouse brain stroke model. More importantly, this technique allows us to continuously monitor the whole process of ischemic stroke and subsequent reperfusion. This work provides a new and versatile tool for vascular research and diagnosis of vascular diseases.
机译:双光子荧光(TPF)成像对脑缺血再灌注损伤的实时监测具有很大的承诺,这对于中风的临床诊断至关重要。然而,缺乏用于TPF成像的生物相容性和可光稳定的鼻发射探针。在此,我们报告使用半导体聚合物制备的第一个NIR-发射TPF探针(命名NESPN)用于TPF成像的脑缺血。由于其具有优异的生物相容性与神经系统和明亮的荧光NIR排放,NESPN使小鼠脑脉管系统具有微小尺度空间分辨率的实时成像,实现了超细毛细血管的清晰可视化(类似于3.16μm)。此外,NESPN可以用于脑血流速度的动态监测。使用NESPN的微观造影成功地用于表示小鼠脑卒中模型中的PENUMBRA区域的开放性。更重要的是,这种技术使我们能够连续监测缺血性卒中的整个过程和随后的再灌注。这项工作为血管研究和血管疾病的血管研究和诊断提供了一种新的和多功能的工具。

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