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- W2011139878 abstract "Diffusion within the extracellular space (ECS) of the brain is necessary for chemical signaling and for neurons and glia to access nutrients and therapeutics; however, the width of the ECS in living tissue remains unknown. We used integrative optical imaging to show that dextrans and water-soluble quantum dots with Stokes–Einstein diameters as large as 35 nm diffuse within the ECS of adult rat neocortex in vivo . Modeling the ECS as fluid-filled “pores” predicts a normal width of 38–64 nm, at least 2-fold greater than estimates from EM of fixed tissue. ECS width falls below 10 nm after terminal ischemia, a likely explanation for the small ECS visualized in electron micrographs. Our results will improve modeling of neurotransmitter spread after spillover and ectopic release and establish size limits for diffusion of drug delivery vectors such as viruses, liposomes, and nanoparticles in brain ECS." @default.
- W2011139878 created "2016-06-24" @default.
- W2011139878 creator A5004323167 @default.
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- W2011139878 date "2006-04-04" @default.
- W2011139878 modified "2023-10-11" @default.
- W2011139878 title "<i>In vivo</i> diffusion analysis with quantum dots and dextrans predicts the width of brain extracellular space" @default.
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- W2011139878 doi "https://doi.org/10.1073/pnas.0509425103" @default.
- W2011139878 hasPubMedCentralId "https://www.ncbi.nlm.nih.gov/pmc/articles/1459394" @default.
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