title: Transfer of ultrasmall iron oxide nanoparticles from human brain-derived endothelial cells to human glioblastoma cells.
abstract: Nanoparticles (NPs) are being used or explored for the development of biomedical applications in diagnosis and therapy, including imaging and drug delivery. Therefore, reliable tools are needed to study the behavior of NPs in biological environment, in particular the transport of NPs across biological barriers, including the blood-brain tumor barrier (BBTB), a challenging question. Previous studies have addressed the translocation of NPs of various compositions across cell layers, mostly using only one type of cells. Using a coculture model of the human BBTB, consisting in human cerebral endothelial cells preloaded with ultrasmall superparamagnetic iron oxide nanoparticles (USPIO NPs) and unloaded human glioblastoma cells grown on each side of newly developed ultrathin permeable silicon nitride supports as a model of the human BBTB, we demonstrate for the first time the transfer of USPIO NPs from human brain-derived endothelial cells to glioblastoma cells. The reduced thickness of the permeable mechanical support compares better than commercially available polymeric supports to the thickness of the basement membrane of the cerebral vascular system. These results are the first report supporting the possibility that USPIO NPs could be directly transferred from endothelial cells to glioblastoma cells across a BBTB. Thus, the use of such ultrathin porous supports provides a new in vitro approach to study the delivery of nanotherapeutics to brain cancers. Our results also suggest a novel possibility for nanoparticles to deliver therapeutics to the brain using endothelial to neural cells transfer.
authors.affiliation: Centre Hospitalier Universitaire Vaudois (CHUV) and University of Lausanne (UNIL), Lausanne, Switzerland.
authors.forename: Blanka
authors.initials: B
authors.lastname: Halamoda Kenzaoui
authors.forename: Silvia
authors.initials: S
authors.lastname: Angeloni
authors.forename: Thomas
authors.initials: T
authors.lastname: Overstolz
authors.forename: Philippe
authors.initials: P
authors.lastname: Niedermann
authors.forename: Catherine
authors.initials: C
authors.lastname: Chapuis Bernasconi
authors.forename: Martha
authors.initials: M
authors.lastname: Liley
authors.forename: Lucienne
authors.initials: L
authors.lastname: Juillerat-Jeanneret
mesh_terms: D001692:Biological Transport; D001812:Blood-Brain Barrier / Q000378:metabolism*; D001921:Brain / Q000166:cytology* / Q000378:metabolism*; D045744:Cell Line, Tumor; D002470:Cell Survival / Q000187:drug effects; D018920:Coculture Techniques; D004247:DNA / Q000378:metabolism; D042783:Endothelial Cells / Q000737:chemistry / Q000166:cytology / Q000378:metabolism*; D052203:Ferrosoferric Oxide / Q000008:administration & dosage / Q000737:chemistry / Q000493:pharmacokinetics*; D005909:Glioblastoma / Q000737:chemistry / Q000378:metabolism*; D006801:Humans; D058185:Magnetite Nanoparticles / Q000008:administration & dosage / Q000737:chemistry*; D008954:Models, Biological; D017655:Silicon Compounds
chemical_list: D058185:Magnetite Nanoparticles; D017655:Silicon Compounds; D004247:DNA; C032734:silicon nitride; D052203:Ferrosoferric Oxide