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Type: Journal article
Title: Cytoplasmic delivery of quantum dots via microelectrophoresis technique
Author: Han, M.
Zhao, J.
Fabian, J.M.
Evans, S.
Mustafa, S.
Ruan, Y.
Wiederman, S.
Ebendorff-Heidepriem, H.
Citation: Electrophoresis, 2021; 42(11):1247-1254
Publisher: Wiley
Issue Date: 2021
ISSN: 0173-0835
Statement of
Mengke Han, Jiangbo Zhao, Joseph Mahandas Fabian, Samuel Evans Sanam Mustafa, Yinlan Ruan, Steven Wiederman, Heike Ebendorff-Heidepriem
Abstract: Nanoparticles with specific properties and functions have been developed for various biomedical research applications, such as in vivo and in vitro sensors, imaging agents and delivery vehicles of therapeutics. The development of an effective delivery method of nanoparticles into the intracellular environment is challenging and success in this endeavor would be beneficial to many biological studies. Here, the well-established microelectrophoresis technique was applied for the first time to deliver nanoparticles into living cells. An optimal protocol was explored to prepare semiconductive quantum dots suspensions having high monodispersity with average hydrodynamic diameter of 13.2-35.0 nm. Micropipettes were fabricated to have inner tip diameters of approx. 200 nm that are larger than quantum dots for ejection but less than 500 nm to minimize damage to the cell membrane. We demonstrated the successful delivery of quantum dots via small electrical currents (-0.2 nA) through micropipettes into the cytoplasm of living human embryonic kidney cells (roughly 20-30 μm in length) using microelectrophoresis technique. This method is promising as a simple and general strategy for delivering a variety of nanoparticles into the cellular environment. This article is protected by copyright. All rights reserved.
Keywords: Biosensor
Intracellular delivery
Quantum dots
Description: First published: 02 March 2021
Rights: © 2021 Wiley-VCH GmbH
DOI: 10.1002/elps.202000388
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Physics publications

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