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- W2893799637 abstract "The delivery of therapeutics to the brain is greatly hampered by the blood-brain barrier (BBB). The use of nanoparticles that can cross the BBB via the process of receptor-mediated transcytosis at blood-brain barrier endothelial cells seems a promising strategy to transport therapeutics into the brain. To screen for suitable nanocarriers, and to study the process of transcytosis, a cultured polarized monolayer of brain microvascular endothelial cells on an extracellular matrix-coated porous membrane filter is widely used as an in vitro BBB model. However, due to the adhesion of numerous types of nanoparticles to the membrane filter and within the filter pores, such a model is unsuitable for the quantification of transendothelial delivery of nanoparticles. Hence, there is a pressing need for a filter-free in vitro BBB model. Ideally, the model is inexpensive and easy to use, in order to allow for its wide use in nanomedicine and biology laboratories around the world. Here, we developed a filter-free in vitro BBB model that consists of a collagen gel covered with a monolayer of brain microvascular endothelial (hCMEC/D3) cells. The paracellular leakage of differently sized dextrans and the transcellular transport of LDL were measured to demonstrate the validity of the filter-free model. Finally, the transendothelial delivery of fluorescently-labelled PEG-P(CL-g-TMC) polymersomes that were functionalized with GM1-targeting peptides was assessed by fluorescence spectroscopy measurement of the luminal, cellular, and abluminal parts of the filter-free BBB model. Our data confirm the effectiveness of the G23 peptide to mediate transport of polymersomes across the BBB and the suitability of this filter-free in vitro model for quantification of nanoparticle transcytosis." @default.
- W2893799637 created "2018-10-05" @default.
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- W2893799637 date "2018-11-01" @default.
- W2893799637 modified "2023-10-10" @default.
- W2893799637 title "A filter-free blood-brain barrier model to quantitatively study transendothelial delivery of nanoparticles by fluorescence spectroscopy" @default.
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- W2893799637 doi "https://doi.org/10.1016/j.jconrel.2018.09.015" @default.
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