title: Perfluorocarbon-Loaded Lipid Nanocapsules to Assess the Dependence of U87-Human Glioblastoma Tumor pO2 on In Vitro Expansion Conditions.
abstract: Growing tumor cell lines, such as U87-MG glioma cells, under mild hypoxia (3% O2) leads to a ca. 40% reduction in growth rate once implanted in the brain of nude mice, as compared to normoxia (21% O2) grown cells, wherein the former over-express HIF-1 and VEGF-A. Despite developing differently, the tumors have similar: blood perfusion, oxygen consumption, and vascular surface area parameters, whereas the number of blood vessels is nearly doubled in the tumor arising from normoxia cultured cells. Interestingly, tumor oxygen tension, measured using 19F-oximetry, showed that the normoxia grown cells led to tumors characterized by mild hypoxic environment (approximately 4%) conditions, whilst the hypoxia grown cells led to tumors characterized by physioxic environment (approximately 6%) conditions. This reversal in oxygen concentration may be responsible for the apparent paradoxical growth profiles.
authors: INSERM U 1066, 'Micro et Nanomédecines biomimétiques - MINT', Angers, France.|Université Angers, UMR-S1066, Angers, France.
authors: Laurent
authors: L
authors: Lemaire
authors: INSERM U 1066, 'Micro et Nanomédecines biomimétiques - MINT', Angers, France.|Université Angers, UMR-S1066, Angers, France.
authors: Janske
authors: J
authors: Nel
authors: PRIMEX-IRM, Université d'Angers, Angers, France.
authors: Florence
authors: F
authors: Franconi
authors: INSERM U 1066, 'Micro et Nanomédecines biomimétiques - MINT', Angers, France.|Université Angers, UMR-S1066, Angers, France.
authors: Guillaume
authors: G
authors: Bastiat
authors: INSERM U 1066, 'Micro et Nanomédecines biomimétiques - MINT', Angers, France.|Université Angers, UMR-S1066, Angers, France.
authors: Patrick
authors: P
authors: Saulnier
mesh_terms: D000818:Animals; D001272:Atmosphere / Q000737:chemistry; D001808:Blood Vessels / Q000187:drug effects / Q000503:physiopathology; D001932:Brain Neoplasms / Q000378:metabolism / Q000473:pathology; D045744:Cell Line, Tumor; D049109:Cell Proliferation / Q000187:drug effects; D005260:Female; D005466:Fluorocarbons / Q000737:chemistry*; D005909:Glioblastoma / Q000098:blood supply / Q000000981:diagnostic imaging / Q000378:metabolism* / Q000473:pathology*; D006801:Humans; D008055:Lipids / Q000737:chemistry*; D051379:Mice; D053769:Nanocapsules / Q000737:chemistry*; D010100:Oxygen / Q000378:metabolism* / Q000494:pharmacology
chemical_list: D005466:Fluorocarbons; D008055:Lipids; D053769:Nanocapsules; D010100:Oxygen