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- W2955074241 abstract "Developing nanocarriers that accumulate in targeted organs and are harmlessly eliminated still remains a big challenge. Nanoparticles (NP) biodistribution is governed by their size, composition, surface charge and coverage. The current thinking in bionanotechnology is that renal clearance is limited by glomerular basement membrane pore size (≈6 nm), although there is a growing evidence that NP exceeding the threshold can also be excreted with urine. Here we compare biodistribution of PEGylated 140 nm iron oxide cubes and clusters with a special focus on renal accumulation and excretion. Atomic emission spectroscopy, fluorescent microscopy and magnetic resonance imaging revealed rapid and transient accumulation of magnetic NP in kidney. Using intravital microscopy we tracked in real time NP translocation from peritubular capillaries to basal compartment of tubular cells and subsequent excretion to the lumen within 60 min after systemic administration. Transmission electron microscopy revealed persistence of intact full-sized NP in urine 2 h post injection. The results suggest that translocation through peritubular endothelium to tubular epithelial cells is an alternative mechanism of renal clearance enabling excretion of NP above glomerular cut-off size." @default.
- W2955074241 created "2019-07-12" @default.
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- W2955074241 date "2019-08-01" @default.
- W2955074241 modified "2023-10-14" @default.
- W2955074241 title "Intravital microscopy reveals a novel mechanism of nanoparticles excretion in kidney" @default.
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- W2955074241 doi "https://doi.org/10.1016/j.jconrel.2019.06.026" @default.
- W2955074241 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/31247280" @default.
- W2955074241 hasPublicationYear "2019" @default.
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