4.5 Review

Methods for Intracellular Delivery of Quantum Dots

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TOPICS IN CURRENT CHEMISTRY
卷 379, 期 1, 页码 -

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SPRINGER INT PUBL AG
DOI: 10.1007/s41061-020-00313-7

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Semiconductor nanocrystals; Electroporation; Microinjection; Cell-penetrating peptides; Liposomes; Intracellular labeling

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This review explores various methods for intracellular delivery of quantum dots, including electroporation, microinjection, cell-penetrating peptides, molecular coatings, and liposomes. Despite the advantageous features of QDs, overcoming delivery barriers is necessary to fully utilize their potential as fluorescent probes.
Quantum dots (QDs) have attracted considerable attention as fluorescent probes for life sciences. The advantages of using QDs in fluorescence-based studies include high brilliance, a narrow emission band allowing multicolor labeling, a chemically active surface for conjugation, and especially, high photostability. Despite these advantageous features, the size of the QDs prevents their free transport across the plasma membrane, limiting their use for specific labeling of intracellular structures. Over the years, various methods have been evaluated to overcome this issue to explore the full potential of the QDs. Thus, in this review, we focused our attention on physical and biochemical QD delivery methods-electroporation, microinjection, cell-penetrating peptides, molecular coatings, and liposomes-discussing the benefits and drawbacks of each strategy, as well as presenting recent studies in the field. We hope that this review can be a useful reference source for researches that already work or intend to work in this area.Graphic AbstractStrategies for the intracellular delivery of quantum dots discussed in this review (electroporation, microinjection, cell-penetrating peptides, molecular coatings, and liposomes).

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