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Tracking of Transplanted Human Mesenchymal Stem Cells in Living Mice using Near-Infra red Ag_2S Quantum Dots

机译:使用近红外Ag_2S量子点追踪活体小鼠中移植的人间充质干细胞

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摘要

Stem cell therapeutics has emerged as a novel regenerative therapy for tissue repair in the last decade. However, dynamically tracking the transplanted stem cells in vivo remains a grand challenge for stem cell-based regeneration medicine in full understanding the function and the fate of the stem cells. Herein, Ag_2S quantum dots (QDs) in the second near-infrared window (NIR-Ⅱ, 1.0-1.4 Jim) are employed for dynamically tracking of human mesenchymal stem cells (hMSCs) in vivo with high sensitivity and high spatial and temporal resolution. As few as 1000 Ag_2S QDs-labeled hMSCs are detectable in vivo and their fluorescence intensity can maintain up to 30 days. The in situ translocation and dynamic distribution of transplanted hMSCs in the lung and liver can be monitored up to 14 days with a temporal resolution of 100 ms. The in vivo high-resolution imaging indicates the heparin-facilitated translocation of hMSCs from lung to liver as well as the long-term retention of hMSCs in the liver contribute to the treatment of liver failure. The novel NIR-II imaging offers a possibility of tracking stem cells in living animals with both high spatial and temporal resolution, and encourages the future clinical applications in imaging-guided cell therapies.
机译:在过去的十年中,干细胞疗法已成为一种用于组织修复的新型再生疗法。然而,在充分了解干细胞的功能和命运的基础上,在体内动态跟踪移植的干细胞仍然是基于干细胞的再生医学面临的巨大挑战。在本文中,第二近红外窗口(NIR-Ⅱ,1.0-1.4 Jim)中的Ag_2S量子点(QDs)用于以高灵敏度和高时空分辨率动态跟踪体内人间充质干细胞(hMSCs)。在体内可检测到多达1000个Ag_2S QDs标记的hMSC,它们的荧光强度可以维持长达30天。移植的hMSC在肺和肝中的原位易位和动态分布最多可以监测14天,时间分辨率为100 ms。体内高分辨率成像表明肝素促进了hMSC从肺向肝的移位,以及hMSC在肝中的长期保留有助于治疗肝衰竭。新颖的NIR-II成像技术提供了以高时空分辨率追踪活体动物干细胞的可能性,并鼓励了在成像指导的细胞疗法中的未来临床应用。

著录项

  • 来源
    《Advanced Functional Materials》 |2014年第17期|2481-2488|共8页
  • 作者单位

    Suzhou Key Laboratory of Nanobiomedical Characterization Division of Nanobiomedicine and i-Lab Suzhou Institute of Nano-Tech and Nano-Bionics Chinese Academy of Sciences Suzhou, 215123, China;

    Suzhou Key Laboratory of Nanobiomedical Characterization Division of Nanobiomedicine and i-Lab Suzhou Institute of Nano-Tech and Nano-Bionics Chinese Academy of Sciences Suzhou, 215123, China;

    Suzhou Key Laboratory of Nanobiomedical Characterization Division of Nanobiomedicine and i-Lab Suzhou Institute of Nano-Tech and Nano-Bionics Chinese Academy of Sciences Suzhou, 215123, China;

    Suzhou Key Laboratory of Nanobiomedical Characterization Division of Nanobiomedicine and i-Lab Suzhou Institute of Nano-Tech and Nano-Bionics Chinese Academy of Sciences Suzhou, 215123, China;

    Suzhou Key Laboratory of Nanobiomedical Characterization Division of Nanobiomedicine and i-Lab Suzhou Institute of Nano-Tech and Nano-Bionics Chinese Academy of Sciences Suzhou, 215123, China;

    Suzhou Key Laboratory of Nanobiomedical Characterization Division of Nanobiomedicine and i-Lab Suzhou Institute of Nano-Tech and Nano-Bionics Chinese Academy of Sciences Suzhou, 215123, China;

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