Light-sheet microscopy as a tool to understanding the behaviour of Polyion complex micelles for drug delivery

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Journal Article
Chemical Communications, 2018, 54 (89), pp. 12618 - 12621
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© The Royal Society of Chemistry. Polyelectrolyte-protein complexes are widely used to deliver therapeutic proteins. Here, we present a method for imaging the release of drugs from polyion complex (PIC) micelles in 3D tumour spheroids using light-sheet microscopy. A negatively charged block copolymer was condensed with a positively charged model drug, hen egg white lysozyme (HEWL) by electrostatic interaction. We were able to observe the distribution of polymer and protein within the entire tumour spheroid, showing that the protein was released from the polyelectrolyte complex upon cell internalization at the peripheral cell layer of the spheroid.
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