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Simultaneous Exposure of Different Nanoparticles Influences Cell Uptake

Groningen Research Institute of Pharmacy, University of Groningen, Antonius Deusinglaan 1, 9713 AV Groningen, The Netherlands
Author to whom correspondence should be addressed.
Academic Editor: Ki Young Choi
Pharmaceutics 2022, 14(1), 136;
Received: 30 September 2021 / Revised: 23 December 2021 / Accepted: 1 January 2022 / Published: 6 January 2022
(This article belongs to the Collection Drug Delivery in The Netherlands)
Drug delivery using nano-sized carriers holds tremendous potential for curing a range of diseases. The internalisation of nanoparticles by cells, however, remains poorly understood, restricting the possibility for optimising entrance into target cells, avoiding off-target cells and evading clearance. The majority of nanoparticle cell uptake studies have been performed in the presence of only the particle of interest; here, we instead report measurements of uptake when the cells are exposed to two different types of nanoparticles at the same time. We used carboxylated polystyrene nanoparticles of two different sizes as a model system and exposed them to HeLa cells in the presence of a biomolecular corona. Using flow cytometry, we quantify the uptake at both average and individual cell level. Consistent with previous literature, we show that uptake of the larger particles is impeded in the presence of competing smaller particles and, conversely, that uptake of the smaller particles is promoted by competing larger particles. While the mechanism(s) underlying these observations remain(s) undetermined, we are partly able to restrain the likely possibilities. In the future, these effects could conceivably be used to enhance uptake of nano-sized particles used for drug delivery, by administering two different types of particles at the same time. View Full-Text
Keywords: nanomedicine; endocytosis; synergy; antagonism; flow cytometry nanomedicine; endocytosis; synergy; antagonism; flow cytometry
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MDPI and ACS Style

de Boer, I.; Richards, C.J.; Åberg, C. Simultaneous Exposure of Different Nanoparticles Influences Cell Uptake. Pharmaceutics 2022, 14, 136.

AMA Style

de Boer I, Richards CJ, Åberg C. Simultaneous Exposure of Different Nanoparticles Influences Cell Uptake. Pharmaceutics. 2022; 14(1):136.

Chicago/Turabian Style

de Boer, Isa, Ceri J. Richards, and Christoffer Åberg. 2022. "Simultaneous Exposure of Different Nanoparticles Influences Cell Uptake" Pharmaceutics 14, no. 1: 136.

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