In Vivo Dual-Modality Fluorescence and Magnetic Resonance Imaging-Guided Lymph Node Mapping with Good Biocompatibility Manganese Oxide Nanoparticles.

In Vivo Dual-Modality Fluorescence and Magnetic Resonance Imaging-Guided Lymph Node Mapping with Good Biocompatibility Manganese Oxide Nanoparticles.
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具有良好生物相容性的氧化锰纳米颗粒的体内双模态荧光和磁共振成像引导淋巴结定位

DOI:
10.3390/molecules22122208
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发表时间:
2017-12-12
期刊:
Molecules (Basel, Switzerland)
影响因子:
--
通讯作者:
Chen X
Chen X
中科院分区:
其他
文献类型:
--
作者:
Zhan Y;Zhan W;Li H;Xu X;Cao X;Zhu S;Liang J;Chen X

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多功能氧化锰纳米颗粒(NPs)具有令人印象深刻的增强T1对比度的能力,在生物医学诊断中显示出巨大的前景。本文中,我们开发了一种基于聚乙二醇(PEG)涂覆的氧化锰纳米颗粒与有机染料(Cy7.5)缀合的双模态成像剂系统,其用作荧光成像(FI)剂以及磁共振成像(MRI)成像剂。所形成的Mn 3 O 4 @ PEG-Cy 7.5纳米颗粒具有约10 nm的尺寸,在不同的生理介质中表现出良好的胶体稳定性。已对非侵入性评估生物分布模式和体内双模态成像引导淋巴结标测的可行性的系列FI和MRI研究进行了研究。此外,组织学和生物化学分析显示,即使在体内剂量为20 mg/kg时,毒性也较低。由于Mn 3 O 4 @ PEG-Cy 7.5 NPs表现出理想的成像剂特性和良好的生物相容性,因此这项工作提供了一个基于氧化锰NPs的稳健、安全和准确的诊断平台,用于肿瘤转移诊断。
Multifunctional manganese oxide nanoparticles (NPs) with impressive enhanced T1 contrast ability show great promise in biomedical diagnosis. Herein, we developed a dual-modality imaging agent system based on polyethylene glycol (PEG)-coated manganese oxide NPs conjugated with organic dye (Cy7.5), which functions as a fluorescence imaging (FI) agent as well as a magnetic resonance imaging (MRI) imaging agent. The formed Mn3O4@PEG-Cy7.5 NPs with the size of ~10 nm exhibit good colloidal stability in different physiological media. Serial FI and MRI studies that non-invasively assessed the bio-distribution pattern and the feasibility for in vivo dual-modality imaging-guided lymph node mapping have been investigated. In addition, histological and biochemical analyses exhibited low toxicity even at a dose of 20 mg/kg in vivo. Since Mn3O4@PEG-Cy7.5 NPs exhibited desirable properties as imaging agents and good biocompatibility, this work offers a robust, safe, and accurate diagnostic platform based on manganese oxide NPs for tumor metastasis diagnosis.
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