Semiconducting polymer nanoparticles as photoacoustic molecular imaging probes in living mice.

Semiconducting polymer nanoparticles as photoacoustic molecular imaging probes in living mice.
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DOI:
10.1038/nnano.2013.302
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发表时间:
2014-03
影响因子:
38.3
通讯作者:
--
中科院分区:
材料科学1区
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--
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光声(PA)成像具有很好的组织穿透性和良好的空间分辨率,在分子水平上对生理学和病理学的可视化有很大的希望。为了充分利用这一潜力,PA分子成像探针必须开发。在此,我们介绍了近红外(NIR)光吸收半导体聚合物纳米粒子(SPN)作为一类新的造影剂PA分子成像。SPN可以产生比常用的单壁碳纳米管和金纳米棒更强的信号,允许在低系统注射质量下在活体小鼠中进行全身淋巴结PA映射。此外,SPNs具有高的结构灵活性,窄PA光谱分布,和强大的抗光降解和氧化,这使得开发的第一个近红外比率PA探针在体内实时成像的活性氧物种的许多疾病的重要化学介质。这些结果表明,SPNs是一个理想的纳米平台,用于开发PA分子探针。
Photoacoustic (PA) imaging holds great promise for the visualization of physiology and pathology at the molecular level with deep tissue penetration and fine spatial resolution. To fully utilize this potential, PA molecular imaging probes have to be developed. Herein we introduce near infrared (NIR) light absorbing semiconducting polymer nanoparticles (SPNs) as a new class of contrast agents for PA molecular imaging. SPNs can produce stronger signal than commonly used single-wall carbon nanotubes and gold nanorods on a per mass basis, permitting whole-body lymph node PA mapping in living mice at a low systematic injection mass. Furthermore, SPNs possess high structural flexibility, narrow PA spectral profiles, and strong resistance to photodegradation and oxidation, which enables development of the first NIR ratiometric PA probe for in vivo real-time imaging of reactive oxygen species—vital chemical mediators of many diseases. These results demonstrate SPNs an ideal nanoplatform for developing PA molecular probes.
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