articleACS NanoSep 3, 2019GREEN OA

Tumor-Derived Extracellular Vesicles Breach the Intact Blood–Brain Barrier via Transcytosis

Boston Children's Hospital · Harvard University · +5 more institutions

PubMed
Indexed incrossrefpubmed

Abstract

The restrictive nature of the blood–brain barrier (BBB) creates a major challenge for brain drug delivery with current nanomedicines lacking the ability to cross the BBB. Extracellular vesicles (EVs) have been shown to contribute to the progression of a variety of brain diseases including metastatic brain cancer and have been suggested as promising therapeutics and drug delivery vehicles. However, the ability of native tumor-derived EVs to breach the BBB and the mechanism(s) involved in this process remain unknown. Here, we demonstrate that tumor-derived EVs can breach the intact BBB in vivo, and by using state-of-the-art in vitro and in vivo models of the BBB, we have identified transcytosis as the mechanism…

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