QUANTUM DOT LABELED STEM CELLS FOR USE IN CARDIAC REPAIR
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    发明申请
    QUANTUM DOT LABELED STEM CELLS FOR USE IN CARDIAC REPAIR 审中-公开
    量子标签干细胞用于心脏修复

    公开(公告)号:US20100158805A1

    公开(公告)日:2010-06-24

    申请号:US12532780

    申请日:2008-03-21

    摘要: The present invention provides methods and compositions relating to the labeling of target cells with quantum dots (QDs). Specifically, a delivery system is disclosed based on the use of negatively charged QDs for delivery of a tracking fluorescent signal into the cytosol of target cells via a passive endocytosis-mediated delivery process. In a specific embodiment of the invention the target cell is a stem cell, preferably a mesenchymal stem cell (MSC). Such labeled MSCs provide a means for tracking the distribution and fate of MSCs that have been administered to a subject to promote cardiac repair. The invention is based on the discovery that MSCs can be tracked in vitro for up to at least 6 weeks. Additionally, QDs delivered in vivo can be tracked for up to at least 8 weeks, thereby permitting for the first time, the complete 3-D reconstruction of the locations of all MSCs following administration into a host.

    摘要翻译: 本发明提供了关于用量子点(QD)标记靶细胞的方法和组合物。 具体地,基于使用带负电荷的量子点,通过被动内吞作用介导的递送过程将跟踪荧光信号传递到靶细胞的胞质溶胶中,公开了递送系统。 在本发明的具体实施方案中,靶细胞是干细胞,优选间充质干细胞(MSC)。 这些标记的MSC提供了跟踪已经施用于受试者以促进心脏修复的MSC的分布和命运的手段。 本发明基于这样的发现,MSC可以在体外追踪长达至少6周。 另外,在体内交付的量测数据可以跟踪至少8周,从而允许在管理到主机之后,所有MSC的位置的完整三维重构。