Efficient Delivery of Quantum Dots into the Cytosol of Cells Using Cell-Penetrating Poly(disulfide)s.

Efficient Delivery of Quantum Dots into the Cytosol of Cells Using Cell-Penetrating Poly(disulfide)s.
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DOI:
10.1021/jacs.7b02952
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发表时间:
2017-08-02
影响因子:
15
通讯作者:
Gonzalez-Gaitan M
Gonzalez-Gaitan M
中科院分区:
化学1区
文献类型:
--
作者:
Derivery E;Bartolami E;Matile S;Gonzalez-Gaitan M

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量子点(QD)是一种非常明亮、光稳定的纳米粒子,广泛用于体外研究单分子动力学。然而,使用量子点在体内研究单分子动力学是受损的缺乏一个有效的方式来化学传递到细胞的胞质溶胶。事实上,目前的方法(例如使用细胞穿透肽)提供非常低的产率:QD停留在质膜上或被捕获在内体中。在这里,我们介绍了一种基于细胞穿透聚(二硫化物)的技术,解决了这个问题:我们每个细胞提供约70个量子点,90%似乎在胞质溶胶中自由扩散。此外,这些QD可以被功能化,例如携带GFP或抗GFP纳米抗体。因此,我们的技术为细胞和活体动物中的单分子成像铺平了道路,从而可以探测胞质溶胶的生物物理特性。
Quantum dots (QDs) are extremely bright, photostable, nanometer particles broadly used to investigate single molecule dynamics in vitro. However, the use of QDs in vivo to investigate single molecule dynamics is impaired by the absence of an efficient way to chemically deliver them into the cytosol of cells. Indeed, current methods (using cell-penetrating peptides for instance) provide very low yields: QDs stay at the plasma membrane or are trapped in endosomes. Here, we introduce a technology based on cell-penetrating poly(disulfide)s that solves this problem: we deliver about 70 QDs per cell, and 90% appear to freely diffuse in the cytosol. Furthermore, these QDs can be functionalized, carrying GFP or anti-GFP nanobodies for instance. Our technology thus paves the way toward single molecule imaging in cells and living animals, allowing to probe biophysical properties of the cytosol.
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